AU2003213468A1 - Dishwasher/Glasswasher and Method of Washing - Google Patents

Description

S&F Ref: 643038

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: Bracton Industries (NSW) Pty Limited 50 Chard Road Brookvale New South Wales 2100 Australia Michael Jeffrey Hunter Spruson Ferguson St Martins Tower Level 31 Market Street Sydney NSW 2000 (CCN 3710000177) Dishwasher/Glasswasher and Method of Washing ASSOCIATED PROVISIONAL APPLICATION DETAILS [33] Country [31] Applic. No(s) AU 2002950203 [32] Application Date 16 Jul 2002 The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5815c DISHWASHER/GLASSWASHER AND METHOD OF WASHING Technical Field The present invention relates to an automatic dishwasher/glasswasher. More particularly, the invention relates to an automatic dishwasher/glasswasher for cleaning objects such as glasses and the like, and to a method of washing such objects.

Background of the Invention Glassware and crockery are frequently cleaned using bleach in soaking tubs. Such chemicals are hazardous, the labour content is high and the results are poor. Many of the currently commercially available glasswashers do not remove all the debris. Handwashing 1o or soaking is frequently required. Further, glasswashers are not generally adapted to function as dishwashers and vice versa. Current glasswashers and/or dishwashers have no means of disconnecting detergent pumps or venturis so that an alternate cleaning substance or solution may be used. Many of the current glasswashers and/or dishwashers in use have mould and fungus growing due to the incubating effect within the washers.

Current dishwashers/glasswashers when activated do not compensate for diluting the wash tank water when an additional cold rinse cycle is selected.

Object of the Invention It is an object of the present invention to overcome or substantially ameliorate at least one of the disadvantages of the currently available machines.

Summary of the Invention According to a first aspect of the present invention, there is provided a dishwasher/glasswasher, comprising: a chamber for holding a plurality of objects to be washed, the chamber defining a sump in a lower region for collecting washing liquid; a removable rack for locating objects in the chamber in spaced relationship from one another and for removing them therefrom after they have been washed; means for spraying a liquid onto the objects when they are located on the rack; means fluidly connecting the means for spraying a liquid to a supply of cleaning liquid and rinsing liquid; a circulating pump fluidly coupled to the sump for circulating liquid from the sump to the means for spraying a liquid; 2 means for removing liquid from the sump said means for removing being fluidly coupled to the sump; means for heating the cleaning liquid and/or the rinsing liquid, if required; means for injecting a detergent suitable for washing glassware into the cleaning liquid which detergent is soluble in the cleaning liquid and forms a washing liquid in combination therewith; and control means comprising: a selector permitting an operator to select an operating cycle from a group consisting of a dishwashing cycle and a glasswashing cycle; and a control circuit electrically coupled to the selector adapted to start the operating cycle after selection by operation of the selector.

In a particular embodiment there is provided a dishwasher/glasswasher, comprising: a chamber for holding a plurality of objects to be washed, the chamber defining a sump in a lower region for collecting washing liquid; a removable rack for locating objects in the chamber in spaced relationship from one another and for removing them therefrom after they have been washed; at least one rotating arm of tubular construction disposed in the chamber comprising means for spraying a liquid onto the objects when they are located on the rack; means fluidly connecting the rotating wash arm to a supply of cleaning liquid and rinsing liquid; a circulating pump fluidly coupled to the sump for circulating liquid from the sump to the rotating arm; means for removing liquid from the sump said means for removing being fluidly coupled to the sump; means for heating the cleaning liquid and/or the rinsing liquid, if required; means for injecting a detergent suitable for washing glassware into the cleaning liquid which detergent is soluble in the cleaning liquid and forms a washing liquid in combination therewith; and control means comprising: 3 a selector permitting an operator to select, an operating cycle from a group consisting of a dishwashing cycle and a glasswashing cycle; and a control circuit electrically coupled to the selector adapted to start the operating cycle after selection by operation of the selector.

The dishwashing cycle may be an operating cycle selected from the group consisting of: a soaking cycle, a combination of a soaking cycle, a short washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a short washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a long washing cycle, a rinsing cycle, a short washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a long washing cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a soaking cycle, a long washing cycle and a rinsing cycle, and a combination of a soaking cycle and a rinsing cycle; and The soaking cycle in any operating cycle may be preceded by a rinsing cycle, a short washing cycle and/or a long washing cycle. The dishwashing cycle may additionally include a drying cycle.

The glasswashing cycle may be an operating cycle selected from the group consisting of: a short washing cycle, a long washing cycle, a rinsing cycle, a combination of a short washing cycle and a rinsing cycle, a combination of a long washing cycle and a rinsing cycle, a combination of a short washing cycle, a long washing cycle and a rinsing cycle, a combination of a short washing cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a long washing cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a long washing cycle, a rinsing cycle, a short washing cycle and a rinsing cycle, and a combination of a long washing cycle, a short washing cycle and a rinsing cycle.

The first cycle in any glasswashing cycle may be a rinsing cycle. A glasswashing cycle may include a soaking cycle. The glasswashing cycle may additionally include a drying cycle. The chamber has an openable door. The door may have a handle.

The dishwasher/glasswasher may comprise at least one rotating arm of tubular construction comprising the means for spraying, disposed in the chamber.

The at least one rotating arm may be at least one lower rotating arm of tubular construction disposed below the removable rack comprising means for spraying a liquid onto the objects from below, when they are located on the rack.

The at least one rotating arm may be an upper rotating arm of tubular construction disposed above the rack comprising means for spraying a solution onto the said objects from above, when they are located on the rack.

There may be at least one lower rotating arm and at least one upper rotating arm located in the chamber. When both an upper rotating arm and lower rotating arm are present the means for connecting connects both the upper and lower rotating arms to a supply of io clean cleaning liquid and/or rinsing liquid. Also in this case the circulating pump is fluidly coupled to the sump for circulating washing liquid from the sump to each of the upper and lower rotating arms.

There may be two or more lower rotating arms and two or more upper rotating arms. In this case the means for connecting may connect one of the lower rotating arms to a supply of clean cleaning liquid and the other of the lower rotating arms to a supply of rinsing liquid and one of the upper rotating arms to a supply of clean cleaning liquid and the other of the upper rotating arms to a supply of rinsing liquid. Also in this latter case the circulating pump is fluidly coupled to the sump for circulating washing liquid from the sump to at least one of the upper and to at least one of the lower rotating arms.

The dishwasher/glasswasher may also include means for injecting a dishwasher detergent into the cleaning liquid which detergent is soluble in the cleaning liquid and forms a dishwashing liquid in combination therewith.

The dishwasher/glasswasher may include an autostart button whereby an operator by pushing the autostart button, the control circuit being also capable of delaying startup of the dishwasher/glasswasher in the event that the cleaning liquid is not at operating temperature, and to cause heating means to bring the dishwasher/glasswasher to operating temperature, whereafter the device is adapted to cause the dishwasher/glasswasher to run through a cycle.

The chamber may be dimensioned so as to enable the dishwasher/glasswasher to be located under a standard height counter in a bar or other area where the dishwasher/glasswasher is to be used. The width of the dishwasher/glasswasher may be 450mm 600mm. Usually the width of the dishwasher/glasswasher is about 500mm.

The height of the dishwater/glasswasher may be 600mm 1000mm usually about 800mm.

The short washing cycle may have a duration of from about 30 seconds to about minutes, preferably about 30 seconds to about 3 minutes, conveniently from about seconds to about 2 minutes, preferably from about 45 seconds to about 1,5 minutes, ideally about 1 minute.

The long washing cycle may have a duration of from about 1 minute to about 15 minutes, advantageously about 1 minute to about 10 minutes, conveniently from about 2 minutes to about 8 minutes, preferably from about 2 minutes to about 6 minutes, adavantageously from about 2 minutes to about 5 minutes, more advantageously from about 2 minutes to about 4 minutes, even more advantageously from about 2 minutes to about 3 minutes.

All dishwasher and glasswasher cycles have a hot rinse at at least 77 0 C, more preferably at least 80*C and even more preferably at least 82 0 C for at least 10 seconds, preferably for at least 12 seconds and more preferably for at least 15 seconds. When an additional rinsing cycle is selected, the objects may be additionally rinsed by spraying cleaning liquid on to them through the upper and lower rotating arms. Conveniently, the additional rinse uses cold washing liquid such as ambient water for at least 10 seconds, preferably for at least 12 seconds and more preferably for at least 15 seconds. The upper and lower arms may be in communication with the circulating pump. They are conveniently rotatably mounted inside the chamber and may be provided with suitable nozzles directed at the objects to enable them to spray the cleaning/washing liquid on to the objects when the dishwasher/glasswasher is in operation. They are usually able to be dismounted and removed from the chamber for cleaning purposes. The cleaning liquid is usually water and the washing liquid is usually a combination of at least detergent and water. The rinsing liquid is usually water. In the case of when a dishwasher cycle is used a standard dishwashing detergent is usually used. The dishwashing detergent may be in liquid or powder form.

It is preferred that the control means be capable of preventing the means for injecting detergent to be deactivated during the entirety of a soaking cycle, unless an additional detergent pump could be activated to supply the correct dosage of the appropriate detergent, so as to avoid and prevent overfoaming and contamination of the soaker detergent.

6 The control means may conveniently be provided with an indicator for at least one of the group consisting of power on, short washing cycle selected, long washing cycle selected, rinsing cycle selected, combination of a short washing cycle and a rinsing cycle selected, combination of a long washing cycle and a rinsing cycle selected, detergent low level, detergent container empty, detergent motor not running, etc.

The control means may be provided with override means to permit an operator to override any alarm or indicator signalling an unusual condition, such as detergent low level, etc.

The control means may be provided with means enabling an operator to vary the length of a cycle.

The dishwasher/glasswasher may be provided with means to inject or admit a substance for facilitating soaking, sanitising, washing and/or rinsing of the objects before, during or after washing thereof.

The control means may be conveniently located on, in or near the dishwasher/glasswasher. In a preferred embodiment, the control means are located in an upper region of the external cabinet of the dishwasher/glasswasher whereby it is readily manually adjustable by a user.

The means for injecting a detergent into the cleaning liquid and/or washing liquid may be adapted to increase or decrease the rate at which detergent is injected into the chamber.

This may conveniently be achieved by providing an electric motor to drive an injection pump, and by varying the speed of the electric motor. Alternatively, this may be achieved by providing a pump of which the stroke may be varied, preferably whilst the pump is in operation or a pump for which the time that the pump operates may be varied.

Conveniently, the dishwasher/glasswasher comprises a drain pump for pumping washing liquid to a drain, or alternatively, to a container or means for further processing thereof, or for regeneration thereof for reuse.

The means for heating the cleaning liquid comprises a resistive element disposed in a rinse tank fluidly coupled to the upper and lower arms and is adapted to heat the rinsing liquid in the rinse tank to a temperature of at least about 82 0 C, conveniently, from about 82 0 C to about 99 0 C, advantageously from about 82 0 C and about 95 0 C, more preferably to between about 82 0 C and about 90 0 C, ideally to at least about 85 0

C.

The means for heating liquid in the sump may comprise a resistive element disposed in the sump and is adapted to heat the liquid in the sump to a temperature of at least about 0 C, conveniently, to between about 65 0 C and about 95 0 C, more preferably to between about 65 0 C and about 80 0 C, ideally to at least about 67 0 C or 70 0

C.

According to a second aspect of the present invention, there is provided a method of cleaning at least one object in a dishwasher/glasswasher of the invention, comprising the steps of: placing the object on the rack in the chamber; controlling the operation of the dishwasher/glasswasher by means of control means comprising selecting an operating cycle from a group consisting of a dishwashing cycle and a glasswashing cycle.

The object is usually placed in an inverted position on the rack. Usually the rack is a stainless steel rack. Usually the chamber is made from stainless steel. Usually the parts disposed inside the chamber are made from stainless steel or plastic.

According to a third aspect of the present invention, there is provided a method of cleaning a dishwasher/glasswasher of the invention, comprising the steps of: cleaning at least the walls of the chamber, the ledges in the chamber and the inside door of the chamber with a descaler at regular intervals.

The method of the third aspect may further include the step of: cleaning the removable rack with a descaler at the regular intervals.

The method of the third aspect may further include the step of: cleaning the external surfaces of the dishwasher with a liquid hydrocarbon mixture at the regular intervals.

According to a fourth aspect of the present invention, there is provided a method of cleaning and maintaining glasses in a dishwasher/glasswasher of the invention, comprising the steps of: washing the glasses at regular intervals in the dishwasher/glasswasher in a soaker cycle in the presence of an effective cleaning amount of a chlorinated trisodium phosphate detergent.

Usually the regular interval is every 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 or 21 days.

8 The cleaning liquid may be water, usually hot water. The cleaning liquid is usually at a temperature greater than or equal to 77 0 C, preferably more than 80 0 C, even more preferably greater than 82 0 C, preferably in the range of 77°C 99 0 C, more preferably 77 0 C 85 0 C, when exiting from the means for spraying.

The dishwasher/glasswasher may include an autostart button; and the method may include pushing the autostart button whereby the control circuit delays startup of the dishwasher/glasswasher in the event that the washing liquid is not at operating temperature, and causes heating means to bring the dishwasher/glasswasher to operating temperature, whereafter the device is adapted to cause the dishwasher/glasswasher to run through an operating cycle.

The method according to the second aspect of the invention may include the step of heating the cleaning liquid and/or washing liquid and/or rinsing liquid, if the liquid requires heating to a desired operating temperature.

The method of the invention may include the step of reproducibly adding in a glasswashing cycle a detergent with disinfecting qualities. The method incudes regularly removing sites for bacteria by descaling the interior of the dishwasher/glasswasher and the sterilising the sump waste using appropriate agents such as chlorinated trisodium phosphate.

According to another aspect of this invention there is provided a dishwasher/glasswasher of the invention when used to clean at least one article selected from the group consisting of a glass, a dish, a cutlery item, a pan, a saucepan, an ashtray, a bowl, a utensil, a cutting board, a crockery item and a container.

The dishwasher/glasswasher of the invention offers high performance glass washing technology to ensure high quality results and maximum efficiency. Advantages and/or features of the dishwasher/glasswasher of the invention include: Upper and lower wash and rinse when upper and lower arms present.

Automatic start function when the temperature of the water reaches the requisite temperature. Throughput efficiency increased by automatic start function with the result that the dishwasher/glasswasher will wash more glasses per hour.

Low foaming detergent is usually used.

Detergent pump with externally adjustable pump speed. A peristaltic pump is especially advantageous in this regard.

Double dose of detergent added in the rinse cycle. In previous machines the rinse cycle dilutes the detergent concentration whereas in the glasswasher of the invention this dilution is compensated automatically.

Warning indicator light indicating out of detergent but can choose to operate dishwasher/glasswasher regardless.

15 Amp with 10 Amp option on resistive element(s) in rinse tank/sump.

One minute wash and rinse cycle if required.

Selectable cold water final rinse.

Detergent pump is deactivated during soaking cycle.

Soaking step with the purpose of sanitising.

Three minute dishwashing powder (pink powder) detergent soak cycle, which may include a final rinse.

Optional drain pump.

The dishwasher/glasswasher of the invention is particularly useful for the cleaning of glassware and crockery in commercial settings such as hotels, restaurants, wine bars and licensed clubs, and cleaning and sanitising of health care items in hospitals.

Brief Description of the Drawings A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein: Figure 1 is a schematic depiction of a dishwasher/glasswasher of the invention showing the internally located parts of the dishwasher as well as the external cabinet; Figure 2 is a schematic depiction of a dishwasher/glasswasher of the invention without showing the internally located parts; Figure 3 is an example of a control circuit for a dishwasher/glasswasher of the invention prepared by Washtech 414 Rosebank Road, Auckland, New Zealand in accordance with specifications provided by the applicant/inventor; and Figure 4 is an example of the text of an instruction label that may be located on the front lower panel of the dishwasher/glasswasher for dishwasher/glasswasher hygiene maintenance.

Detailed Description of the Preferred Embodiments Referring to Fig. 1 dishwasher/glasswasher 100 has chamber 101 for holding a plurality of objects to be washed, chamber 101 defining sump 102 in a lower region for collecting washing liquid. Removable rack 104 is located in chamber 101 on support ledges 104a and 104b for locating objects in the chamber in spaced relationship from one another and for removing them therefrom via openable door, 105 after they have been washed.

to Insulation is used to line the insides of the top panel 100a and sides 100b and 100c of glasswasher/dishwasher 100 and allows dishwasher/glasswasher 100 to recover quickly between cycles.

Upper rotating wash arm 106 and rinse arm 106a are located in chamber 101 and are of tubular construction wherein wash arm 106 comprises spray holes 106b for spraying a cleaning liquid/washing liquid, and wherein rinse arm 106a comprises spray holes 106c for spraying a rinse liquid, onto the said objects (not shown) located in removable rack 104 from above. Lower rotating wash arm 107 and rinse arm 107a are located in chamber 101 and are of tubular construction wherein lower rotating wash arm 107 comprises a plurality of spray holes 107b for spraying a cleaning liquid/washing liquid, and wherein rinse arm 107a comprises spray holes 107c for spraying a rinse liquid, onto the objects (not shown) located in removable rack 104 from below.

Arm 107 is connected to wash pump 108 via tubes 109 and 109a and arm 107 is connected to wash pump 108 via tubes 110 and 120. Pump 108 is fluidly coupled to sump 102 via tube 111 d and sump drain cover lia. Sump drain cover lIla is of a desired height and has an aperture 11 lb in its top which allows liquid to pass through when the liquid level in sump 102 covers the top of sump drain cover 11 a. Mesh cover 11 c is disposed over sump drain cover 11a thereby acting as a filter of the liquid in sump 102 so as to prevent food particles and other solid debris from reaching and blocking aperture 11 lb. In use wash pump 108 circulates cleaning liquid/washing liquid/rinse liquid, more usually cleaning liquid/washing liquid, from sump 102 to upper and lower rotating wash arms 106 and 107.

A supply of hot water is provided to rinse tank 103 via hot water supply tube 109, hot water valve/solenoid 110, connector tube 111, vacuum break 112 and connector tube 113.

11 Heating elements 114 and 114a are located in rinse tank 103 to heat liquid located therein to 82 0 C or above, which is measured by temperature sensor 116 located in tank 103. Heating element 114 is used when dishwasher/glasswasher 100 is connected to a ac power supply via power cord 167 whereas when dishwasher/glasswasher 100 is connected to a 15Amp ac power supply via power cord 167 heating element 114a is used. Rinse tank 103 is fluidly coupled to rinse arm 106a via tube 117 and connector tube 118 and to rinse arm 107a via tube 117, tube 118, tube 119, tube 120 and connector tube 121. Detergent pump 122 is coupled to detergent reservoir 123a, via line 124a and to chamber 101 via tube 125 and detergent inlet aperture 126. Detergent pump 122 may be a peristaltic pump the speed of which may be manually adjustable via a screw adjustment 123. A small aperture 124 may be located in removable front lower panel 125 to enable pump 122 to be adjusted via screw adjustment 123 without removing front lower panel 125.

A supply of cold water is supplied to rinse arm 107a via cold water inlet tube 127, cold water valve/solenoid 129, tube 128 and connector tube 118. A supply of cold water is supplied to rinse arm 106a via cold water inlet tube 127, cold water valve/solenoid 129, tube 128, connector tube 119, connector tube 120 and inlet tube 121.

Dishwasher/glasswasher 100 has four legs 130, 131, 132 and 133 which are high enough 15cm) to permit ready access under dishwasher/glasswasher 100 thereby enabling hoses 109 and 127 to be connected and disconnected without tipping dishwasher/glasswasher 100.

Chamber 101 has pressure valve 134 located therein which is connected to pressure switch via line 136. Chamber 101 has heating element 155 located therein as well as temperature sensor 156. Optional drain 137 in chamber 101 is connected to drain tube 138 via S bend 139 and drain pump 140.

Control panel 141 comprises on/off push button switch 142, on indicator light 143, wash indicator light 144, rinse indicator light 145, cold rinse push button switch 146, cold rinse indicator light 147, soak cycle push button switch 148, soak cycle indicator light 149, optional drain switch 150, run indicator light 151 and start button 152. Control panel 141 permits an operator to select an operating cycle from a group consisting of a dishwashing cycle and a glasswashing cycle. Control panel 141 is electrically linked to control circuit 154 via line 153. Control circuit 154 is linked to detergent pump 122 via line 157, heating element 114 (also referred to as rinse element) via line 158 heating element 114a via line 12 159, temperature sensor 116 via line 160, drain pump 140 via line 160, heating element 155 (also referred to as wash element) via line 161, temperature sensor 156 via line 168, pressure switch 135 via line 163, hot water valve/solenoid 110 via line 164, cold water valve/solenoid 129 via line 165 and pump 108 via line 166.

In use sump drain cover lila is placed over sump drain Ille, mesh cover 111c is thereafter placed over sump drain cover 11 a and door 105 is closed. If socket 167a is not plugged into a power socket then plug it in and turn the power on and turn on on/off push button switch 142. On indicator light 143 comes on and rinse tank 103 fills with hot water via tube 109, valve/solenoid 110, tube 111, vacuum break 112 and tube 113. Hot water also passes through rinse tank 103 and thereafter out through top and bottom rinse arms 106a and 107a to fill sump 102 with hot water until pressure valve 134 turns off pressure switch 135 (which is adjustable) to set level of water in sump 102 (sump 102 is also referred to as a wash tank). Pressure switch 135 then switches water off and then switches on rinse tank element 114 through the rinse tank thermostat. When rinse tank 103 is full wash indicator light 144 lights up and water in rinse tank 103 is heated by element 114 or 114a. Objects to be cleaned are placed on removable rack 104 (if the objects are glasses or other types of containers they are usually placed upside down on removable rack 104). The loaded removable rack 104 is then placed in chamber 101 on support ledges 104a and 104b. If soak cycle push button switch 148 is selected then detergent pump 122 will not pump detergent into chamber 101 via detergent aperture 126 and cold rinse will not be enabled. Usually a suitable powder or liquid detergent is manually added when the soak cycle push button switch 148 is selected. Cold rinse push button switch 146 can be pushed in if required. Start button 152 is then pushed by the operator and run light indicator comes on. When the temperature of water in rinse tank 103 is up to 82 0 C or higher (up to 99 0 C) then the thermostat (3 pole) activates the rinse ready light and allows the start relay to activate the T1 cam on the timer which commences the wash cycle by switching from T1 normally closed /common to normally open/common after 3 seconds. T1 will then keep going for a total of 3 minutes or less if advance timer is activated. If the soak cycle push button (long cycle) switch 148 is depressed then the advance timer motor is disconnected. If soak cycle push button (long cycle) switch 148 is not depressed then advance timer T4 is connected because the soak cycle is disconnected and the cycle advances from 5 seconds to 107 seconds in about 3 seconds and then runs at normal speed from 107 seconds to 145 seconds i.e. a 41 second cycle of the wash pump 108. (T2 long wash cycle is 2 mins 20 seconds).

In relation to Fig. 3: 1. Detergent pump 122 is disconnected when the Long Cycle (soaker cycle) is activated. This occurs as the common supply to Cam 6 on the timer is disconnected by the Long Cycle, being activated, disconnects the normally closed circuit (yellow red).

S 2. Cam 5 (T5) on the timer 3. Cam T4 gives the "glasswasher function" by activating the Advance timer motor when the Long Cycle (soaker cycle) is not activated reducing wash cycle to 41 seconds.

1 4. The Cold Rinse is deactivated during the Long Cycle (soaker cycle) by disconnecting the common on the Cold Rinse cycle switch. This reduces chemical 1o wastage if the cycle was still activated as it further dilutes the soaker solution.

The Auto Start function occurs due to a relay that allows the thermostat to activate the normally closed on TI, when the wash thermostat reaches temperature.

6. Wash cycle water comes out of both arms 106 and 107 with detergent via T6 which is supplied from detergent pump 122 and is squirted in via orifice 126 at 107-120 sees (adjustable).

Soak Cycle Dishwashing soak cycle push button (long cycle) switch 148 pushed in) 1. Wash cycle 82 0 C from rinse tank 103 2 mins. 20 sees- water coming out of both arms 106 and 107 with detergent out of aperture 126 via pump 122 and tube 125 via T6 detergent is squirted in at 107-120 sees.

2. T7 148-160 sees. 82 0 C hot rinse cycle.

3. Cycles back to start TI flicks back up disconnects the active to the timer motor.

Features of Soak cycle detergent pump 122 disconnected on soak cycle and cold rinse cycle.

detergent pump 122 is disconnected from cam T6 normally closed power is disconnected by soaker switch.

soak cycle disconnects T4 which normally activates the advance timer.

hot rinse kicks in on T7 at 148 160 sees.

cold rinse disabled.

14 by disabling cold rinse detergent pump 122 is also disabled.

Soak Cycle Not Activated (soak cycle push button (long cycle) switch 148 not pushed in) Used In Glasswashing 1. 1 min 11 sec cycle (107-178 sec) via T4 cam. T4 turns off at 107 sec. Detergent pump 122 gets signal through T6 (pump 122 is adjustable through screw adjustment 123).

T4 is control for advance timer.

2. Normally wash cycle is 5-145 sec for wash pump 108. If T4 is on soak cycle off) the advance motor is activated shortening the cycle. The advance motor takes about 3 secs to advance. From 107 145 seconds on remainder of wash cycle, i.e. a total of about 1o 41 secs. on wash cycle. Detergent pump 122 kicks in from 107-120 secs (adjustable).

Hot rinse kicks in on T7 at 148-160 secs. 82 0 C minimum in rinse tank 103 (77 0 C in arms 106a and 107a).

Optional cold rinse Glasswashing Same as soak cycle deactivated except T3 activates an additional cold rinse from 163 (adjustable) sec to 173 secs (water temperature corresponds to input temperature of cold water). Detergent 122 receives a second signal to dose detergent twice, once during cycle T6 and a second signal from T6 normally open when valve/solenoid 129 is activated.

Start relay (Autostart) Eleven pin relay which is interconnected to temperature sensor 116 in rinse tank 103 and is disconnected by T2 after being activated. The coil on the 11 pin relay is connected normally closed on T2 and is deactivated when T2 goes to wash mode which occurs when temperature sensor 116 in rinse tank 103 goes to 82 0 C. Wash light goes on. When the rinse tank 103 gets to temperature (greater or equal to 82 0 the electricity goes to the wash tank element 114 or 114a (depending whether power cord 167 is connected to a 1 0A or 15Amp ac power supply) through the wash tank thermostat. Sump 102 water is heated to a temperature of 65 0 C (as measured by temperature sensor 156). When the autostart is activated, one of the poles on the relay puts power from 7 to 6 on relay which turns on green run light, when relay is deactivated it puts power from 5 to 6.

If detergents are added to the soak cycle then dishwasher/glasswasher 100 should be drained prior to changing cycles. This is accomplished by removing mesh cover 11 lc and sump drain cover 111 a and allowing sump 102 to empty usually whilst leaving door 105 open. On/off push button switch 142 is then deactivated and power is turned off at the power point. Sump drain cover 111 a and mesh cover 111 c are replaced. Wash arms 106 and 107 and 107 are removable and should be removed and cleaned on a regular basis.

Only low foam detergents should be used in the dishwasher/glasswasher 100 in an amount to effective to clean the gtlassware without being in excess such as to cause arms to stop freely spinning or to cause excessive foaming in the chamber 101.

PARTICULAR FEATURES OF A PREFERRED

DISHWASHER/GLASSWASHER

1. Control panel 141 is resilient to moisture since top 100a folds over the top of control io panel 141 to prevent water flowing from top 100a flowing behind panel 141 and causing electrical damage.

2. Control buttons on control panel 141 being located at the top front surface of dishwasher/glasswasher 100 make for ease of operation and no bending by the operator.

3. No electric relays or timers are installed in the control panel 141. This allows for a slim line approach to control panel 141.

4. Having a smaller control panel 141 allows for tall glasses to be fitted inside the chamber 101. Top wash arm 106 allows for the external surfaces of objects to be washed this is very important especially when lipstick is to be removed from glassware.

6. A cold rinse allows for the temperature that is gained during the hot rinse at a minimum of 82 deg. C. to be dissipated. Additional cleaning is achieved by better rinsing of the wash water off the objects. The detergent pump 122 is activated for the second time to maintain the correct detergent level.

7. Wash pump 108, timer, valve/solenoids, thermostats, boiler tank 103 and delays are mounted inside the lower section of dishwasher/glasswasher 100. Mounting on door 105 to the lower section has been avoided as over foaming of detergents could cause electrical faults.

8. Valve/solenoids 110 and 129 both hot rinse and cold rinse are mounted through the base 168 of the dishwasher/glasswasher 100 for ease of connection. Brass valve/solenoids 110 and 129 are used to prevent common cross threading of the 16 connection hoses 109 and 127 to the hot and cold water taps. It is common for plastic constructed valve/solenoids to be used in glasswashers. They are often difficult to align duel to the congested location inside these machines.

9. Often in currently available glasswashers when cross threaded plastic valve/solenoids are connected, serious damage occurs to the electrics which are in close proximity.

The body of plastic valve/solenoids used in currently available glasswashers often split due to old age and continual hot cold shrinkage. When these valve/solenoids fail, serious damage will occur to the exposed electrics often including open wound electric motors.

11. The positions of valve/solenoids 110 and 129 allows for an improved safety on installation and repair of glasswashers and dishwashers.

12. Braided seamless steel hoses with meta connecting nuts usually 1/2 bsp to 3/4 bsp are preferred for hoses 109 and 127.

13. The positions of valve/solenoids 110 and 129 allow for safer connection of the water supplies to glasswasher/dishwasher 100.

14. Failure of the braided stainless steel hoses 109 and 127 which occurs regularly means that water is not readily sprayed onto or into the wash pump 108 or detergent pump 122, or timers and thermostats and other electrical entities used in control circuit 154. This is because the hoses 109 and 127 are connected internally and in close proximity to control circuits of currently available glasswashers to internally located valve/solenoids.

The access point for connection to water supply valve/solenoids 110 and 129 is at the base 168 of the glasswasher/dishwasher 100. This improvement means maintenance may occur without having to remove the glasswasher/dishwasher 100 from its usual operating position in order to gain access.

16. The disadvantage of having to remove a glasswasher /dishwasher is that it necessitates permanent waste plumbing to be disconnected. Water is again leaked from the S-trap wastes used. Re-alignment is difficult and again access involves confined areas.

17 17. Benefits are considerable savings by quick access to valve/solenoid valves 110 and 129 by not having to disconnect waste pipes. This represents an improved process in accordance with occupational health and safety.

18. The adjustable detergent pump 122 has a screw adjustment 123 through the front aperture 124 of the front lower panel 125. Connection to pump 122 from screw adjustment 123 is a steel shaft connected to variable timer detergent pump 122.

19. An arrow disposed externally on front lower panel 125 in the vicinity of aperture 124 shows a symbol for increasing the detergent dosage and a symbol for decreasing the detergent dosage delivered by pump 122.

20. Adjustment of the detergent pump 122 is necessary as the delivery rate of the detergent deteriorates as the peristaltic tube ages. Glasswashers are required by law under the Food Act to supply detergent that will adequately clean glasses. Thus regular adjustment is required to meet Health Standards.

21. Only licensed electricians or trained personnel can currently adjust detergent timers or venturis located inside currently available glasswashers.

22. High maintenance costs are experienced with adjustments to detergent feeders within currently available glasswashers.

23. All glasswashers act like incubators and grow bacteria and mould in the presence of protein products such as beer.

24. All regulations recognise that equipment must be mould and fungi free.

In the case of dishwasher/glasswasher 100 Maintenance Instructions may be located on the front lower panel 125 to assist in compliance to maintaining dishwasher/glasswasher 100 whereby it is clean and substantially free of mould and bacteria in accordance with the requirements of the Food Act.

26. When chlorinated alkaline salts and surfactants are used such as Bracton Pink Glass Soaking Detergent or chlorinated trisodium phosphate white or pink low foaming detergent available from Bracton Industries (NSW) Pty Ltd, 50 Chard Rd, Brookvale, NSW 2100, Australia, is used in the soaker cycle a mould and virus free environment results. The use of a soaker cycle and chemicals of the nature of 'oxidizer' and 'alkaline salts' such as chlorinated trisodium phosphate are effective in maintaining acceptable standards for multiple uses.

18 27. The soaker cycle allows for inoculated glass to be adequately cleaned.

Previously this has been extremely difficult to achieve as the sites for bacteria are created by sand blasting the glass during the inoculating process.

28. Inoculated glasses are ineffective in use for releasing carbon dioxide when residual dirt blocks their focal points for the releases of CO 2 in carbonated soft drinks and beer.

29. The presentation of beer products and soft drinks for example the 'Head' foam on the top of a beer glass or gas bubbling in soft drinks is desirable. The lower temperatures of the serving of beer, ie. 0 deg. C has meant inoculated glassware has become desirable but difficulties have arisen in practice in adequately cleaning such glasses without mechanically cleaning them.

Compliance of Health Standards under ANSFA and the Food Act require glasses as drinking utensils to be free of dirt.

31. Doubt exists that current glass cleaning methods are effective over long periods.

32. Existing cleaning methods include hand scrubbing of glasses with brushes and electric brush machines receptacle with hand scrubbing of glass cups with immersing trays of glasses into a larger solution of various chemicals including soaking in liquid bleach.

33. The labour costs of previous glass and cup care has been high.

34. Many cafes, nursing homes, restaurants and hotels experience staining from tea and coffee in cups.

This inventive apparatus and method gives excellent results within 3 minutes on most occasions with no labour required other than 1 scoop -20 grams of chlorinated trisodium phosphate pink, per 5 trays washed.

36. Wastages caused through overdosing during the manual cleaning systems is common and poorly controlled. This affects the standard and consistency of the cleaning process.

37. The cleaning procedure of 1 scoop per five trays washed provides consistent results.

38. The use of a stainless steel tray for removable rack 104 has been found to prevent metal salts redepositing on glassware and crockery when in the presence of alkaline solutions.

19 39. Zinc coated racks and chrome plated steel racks are believed by the present inventor to partly corrode forming metal salts which redeposit on glassware and cups to form scaling and are thought to be not suitable for use as a removable rack 104 at least in the long term although they may be suitable for short term use.

40. Any scale including a white scale is undesirable to the serving of beer and post mix products. Dishwasher/glasswasher 100 is kept free of scale by the regular use of Bracton Machine Descaler or Ice Bank Descaler which is an aqueous solution of an acid phosphorus compound and is available from Bracton Industries (NSW) Pty Ltd, Chard Rd, Brookvale, NSW 2100, Australia.

41. Chrome plated racks were found by the inventor to readily rust and would not comply with health regulations.

42. The dimensions of 500mm in width for the glasswasher is desirable due to existing machines that have been built in benches. It would mean considerable cost to change bench work if the machine was larger in width than currently available machines. Overall height of the dishwasher/glasswasher is -850mm. A 360 x 435mm stainless steel rack may be used. Legs 130, 131, 132 and 133 provide 150mm clearance. Other features, some of which are preferred only, include upper control panel 141, upper and lower washing and rinsing, autostart, detergent pump 122 with externally adjustable detergent speed via aperture 124, warning light for out of detergent, but can choose to operate dishwasher/glasswasher 100 regardless, operation with 10Amp option, one minute wash and rinse cycle, selectable cold final rinse, three minute Bracton pink powder soak cycle, which includes final hot rinse (820C), detergent pump 122 is deactivated, drain pump 140 is optional, instruction sticker on panel 125 and insulation on tanks to conserve energy and lower temperature in elements 114, 114a and 155.

43. A large capacity -~100itres/min 2 hp wash pump 108 may be used.

44. Legs 130, 131, 132 and 133 of 150mm minimum height may be used to provide ready access under dishwasher/glasswasher 100.

The stainless steel panels 125, 100a, 100b, 100c and door 105 of dishwasher/glasswasher 100 may be externally maintained with Bracton Stainless Steel Oil or Stainless Steel Polish which is a liquid hydrocarbon mixture and is available from Bracton Industries (NSW) Pty Ltd, 50 Chard Rd, Brookvale, NSW 2100, Australia, to prevent rusting.

46. If sump drain 11 lb becomes blocked and drain water comes out the door 105 (same if wrong detergent in machine) the dishwasher/glasswasher 100 is designed to have minimum water damage. The dishwasher/glasswasher 100 of the invention is designed to have long life as lower front lower panel 125 has no external switches which helps to minimise problems from water damage.

47. Users don't have to have to use brushes to scrub glasses in caustic solution prior to placing glasses in dishwasher/glasswasher 100.

48. The dishwasher/glasswasher 100 may be converted from a glasswasher cycle (no soak cycle) to a dishwasher cycle (soak cycle) by a single press of soak cycle push button switch 148 (switch out -glasswasher cycle, switch in dishwasher cycle).

The soak cycle provides sanitising and dishwashing 49. The glasswashing detergent used should to be brewery approved. An example of such a detergent is Bracton (RTU) Glass Wash Detergent or Glass Wash which is an aqueous solution of mixed surfactants and is available from Bracton Industries (NSW) Pty Ltd, 50 Chard Rd, Brookvale, NSW 2100, Australia.

FEATURES OF THE CONTROL PANEL 1. Slimline dimensions of 40mm x 495mm.

2. No rinse thermostat dial is used, rather a tick and an indicator light on the Rinse cycle. This causes less concern over the alternative being a dial thermostat which must be accurate to within 1%.

3. Typical glasswasher/dishwashers have selector switches which rotate to different positions, i.e. 1, 2, 3 cycle.

4. Confusion over the operation has been simplified by a depressible single button for extra Cold rinse or Soaker Cycle.

A simple Start Switch will activate a relay which will auto start the machine when the rinse temperature is reached.

6. Auto Start will increase the number of trays of glasses/dishes which are processed in the operation.

21 7. Increased height 40mm within in chamber 101 due to slimline control panel 141 located at the top of the front of dishwasher/glasswasher 100.

INSTRUCTION LABEL 1. Provided instructions on the label shown in Figure 4 are followed the process of cleaning leaves dishwasher/glasswasher 100 clean and maintained.

2. Descaling procedure as specified on label ensures mould does not form and a clean machine.

Claims (32)

1. A dishwasher/glasswasher, comprising: a chamber for holding a plurality of objects to be washed, the chamber defining a sump in a lower region for collecting washing liquid; a removable rack for locating objects in the chamber in spaced relationship from one another and for removing them therefrom after they have been washed; means for spraying a liquid onto the objects when they are located on the rack; means fluidly connecting the means for spraying a liquid to a supply of cleaning 0 liquid and rinsing liquid; a circulating pump fluidly coupled to the sump for circulating liquid from the sump to the means for spraying a liquid; means for removing liquid from the sump said means for removing being fluidly coupled to the sump; means for heating the cleaning liquid and/or the rinsing liquid, if required; means for injecting a detergent suitable for washing glassware into the cleaning liquid which detergent is soluble in the cleaning liquid and forms a washing liquid in combination therewith; and control means comprising: a selector permitting an operator to select an operating cycle from a group consisting of a dishwashing cycle and a glasswashing cycle; and a control circuit electrically coupled to the selector adapted to start the operating cycle after selection by operation of the selector.

2. The dishwasher/glasswasher of claim 1 wherein the dishwashing cycle is an operating cycle selected from the group consisting of: a soaking cycle, a combination of a soaking cycle, a short washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a short washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a long washing cycle, a rinsing cycle, a short washing 23 cycle and a rinsing cycle, a combination of a soaking cycle, a rinsing cycle, a long washing cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a soaking cycle, a long washing cycle and a rinsing cycle, and a combination of a soaking cycle and a rinsing cycle; and

3. The dishwasher/glasswasher of claim 2 wherein the soaking cycle in any operating cycle may be preceded by a rinsing cycle, a short washing cycle and/or a long washing cycle.

4. The dishwasher/glasswasher of claim 2 wherein the dishwashing cycle additionally includes a drying cycle.

5. The dishwasher/glasswasher of claim 1 wherein the glasswashing cycle is an operating cycle selected from the group consisting of: a short washing cycle, a long washing cycle, a rinsing cycle, a combination of a short washing cycle and a rinsing cycle, a combination of a long washing cycle and a rinsing cycle, a combination of a short washing cycle, a long washing cycle and a rinsing cycle, a combination of a short washing cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a long washing cycle, a rinsing cycle, a long washing cycle and a rinsing cycle, a combination of a long washing cycle, a rinsing cycle, a short washing cycle and a rinsing cycle, and a combination of a long washing cycle, a short washing cycle and a rinsing cycle.

6. The dishwasher/glasswasher of claim 1 wherein the first cycle in any glasswashing cycle is a rinsing cycle.

7. The dishwasher/glasswasher of claim 1, 5 or 6 wherein the glasswashing cycle includes a soaking cycle.

8. The dishwasher/glasswasher of claim 1, 5, 6 or 7 wherein the glasswashing cycle additionally includes a drying cycle.

9. The dishwasher/glasswasher of any one of claims 1 to 7 wherein the chamber has an openable door having a handle.

The dishwasher/glasswasher of any one of claims 1 to 8 comprising at least one rotating arm of tubular construction comprising the means for spraying, disposed in the chamber. 24

11. The dishwasher/glasswasher of claim 9 wherein the at least one rotating arm is selected from the group consisting of at least one lower rotating arm of tubular construction disposed below the removable rack comprising means for spraying a liquid onto the objects from below, when they are located on the rack and at least one upper rotating arm of tubular construction disposed above the rack comprising means for spraying a solution onto the said objects from above, when they are located on the rack.

12. The dishwasher/glasswasher of claim 9 wherein the at least one rotating arm comprises at least one lower rotating arm of tubular construction disposed below the removable rack comprising means for spraying a liquid onto the objects from below, when they are located on the rack, and at least one upper rotating arm of tubular construction disposed above the rack comprising means for spraying a solution onto the said objects from above, when they are located on the rack, the means for connecting connects both the upper and lower rotating arms to a supply of clean cleaning liquid and/or rinsing liquid and the circulating pump is fluidly coupled to the sump for circulating washing liquid from the sump to each of the upper and lower rotating arms.

13. The dishwasher/glasswasher of claim 9 wherein there are there are two or more lower rotating arms and two or more upper rotating arms, the means for connecting connects one of the lower rotating arms to a supply of clean cleaning liquid and the other of the lower rotating arms to a supply of rinsing liquid and one of the upper rotating arms to a supply of clean cleaning liquid and the other of the upper rotating arms to a supply of rinsing liquid and the circulating pump is fluidly coupled to the sump for circulating washing liquid from the sump to at least one of the upper and to at least one of the lower rotating arms.

14. The dishwasher/glasswasher of any one of claims 1 to 12 further including means for injecting a dishwasher detergent into the cleaning liquid which detergent is soluble in the cleaning liquid and forms a dishwashing liquid in combination therewith.

15. The dishwasher/glasswasher of any one of claims 1 to 13 further including an autostart button whereby an operator by pushing the autostart button, the control circuit is also capable of delaying startup of the dishwasher/glasswasher in the event that the cleaning liquid is not at operating temperature, and to cause heating means to bring the dishwasher/glasswasher to operating temperature, whereafter the device is adapted to cause the dishwasher/glasswasher to run through a cycle.

16. The dishwasher/glasswasher of any one of claims 1 to 14 wherein the chamber is dimensioned so as to enable the dishwasher/glasswasher to be located under a standard height counter in a bar or other area where the dishwasher/glasswasher is to be used.

17. The dishwasher/glasswasher of any one of claims 1 to 15 wherein the width of the dishwasher/glasswasher is in the range 450mm 600mm and the height of the dishwater/glasswasher is in the range 600mm 1000mm.

18. The dishwasher/glasswasher of any one of claims 2, 3 or 5 wherein the short washing cycle has a duration selected from the group consisting of from about seconds to about 5 minutes, from about 30 seconds to about 3 minutes, from about seconds to about 2 minutes, from about 45 seconds to about 1.5 minutes, and about 1 minute.

19. The dishwasher/glasswasher of any one of claims 2, 3 or 5 wherein the long washing cycle has a duration selected from the group consisting of from about 1 minute to about 15 minutes, from about 1 minute to about 10 minutes, from about 2 minutes to about 8 minutes, from about 2 minutes to about 6 minutes, from about 2 minutes to about 5 minutes, from about 2 minutes to about 4 minutes, from about 2 minutes to about 3 minutes.

The dishwasher/glasswasher of any one of claims 1 to 18 wherein the dishwasher and glasswasher cycles have a hot rinse at a temperature in the range of 77 0 C 99 0 C.

21. The dishwasher/glasswasher of any one of claims 1 to 19 wherein the upper and lower arms are in communication with the circulating pump, are rotatably mounted inside the chamber and provided with suitable nozzles directed at the objects to enable them to spray the cleaning/washing liquid on to the objects when the dishwasher/glasswasher is in operation and are able to be dismounted and removed from the chamber for cleaning purposes. 26

22. The dishwasher/glasswasher of any one of claims 1 to 20 wherein the control means is capable of preventing the means for injecting detergent to be deactivated during the entirety of a soaking cycle.

23. The dishwasher/glasswasher of any one of claims 1 to 21 wherein the control means has an indicator for at least one of the group consisting of power on, short washing cycle selected, long washing cycle selected, rinsing cycle selected, combination of a short washing cycle and a rinsing cycle selected, combination of a long washing cycle and a rinsing cycle selected, detergent low level, detergent container empty and detergent motor not running.

24. The dishwasher/glasswasher of any one of claims 1 to 22 wherein the control means has an override means to permit an operator to override any alarm or indicator signalling an unusual condition.

The dishwasher/glasswasher of any one of claims 1 to 23 wherein the control means has means enabling an operator to vary the length of a cycle.

26. The dishwasher/glasswasher of any one of claims 1 to 24 further comprising means to inject or admit a substance for facilitating soaking, sanitising, washing and/or rinsing of the objects before, during or after washing thereof.

27. The dishwasher/glasswasher of claim 25 wherein the comprising means to inject or admit is adapted to increase or decrease the rate at which the substance is injected into the chamber.

28. The dishwasher/glasswasher of any one of claims 1 to 26 further comprising a drain pump for pumping washing liquid to a drain or to a container or means for further processing thereof, or for regeneration thereof for reuse.

29. The dishwasher/glasswasher of any one of claims 1 to 27 wherein the means for heating the cleaning liquid comprises a resistive element disposed in a rinse tank fluidly coupled to the upper and lower arms and is adapted to heat the rinsing liquid in the rinse tank to a temperature selected from the group consisting of at least about 82 0 C, from about 82 0 C to about 99 0 C, from about 82 0 C and about 95 0 C, between about 82 0 C and about 90 0 C, and at least about 85 0 C.

30. The dishwasher/glasswasher of any one of claims 1 to 28 wherein the means for heating liquid in the sump comprises a resistive element disposed in the sump which is adapted to heat the liquid in the sump to a temperature selected from the group 27 consisting of at least about 65 0 C, between about 65 0 C and about 95 0 C, between about 65 0 C and about 80 0 C, at least about 67 0 C and at least about 70 0 C.

31. A dishwasher/glasswasher, comprising: a chamber for holding a plurality of objects to be washed, the chamber defining a sump in a lower region for collecting washing liquid; a removable rack for locating objects in the chamber in spaced relationship from one another and for removing them therefrom after they have been washed; at least one rotating arm of tubular construction disposed in the chamber comprising means for spraying a liquid onto the objects when they are located on the rack; means fluidly connecting the rotating wash arm to a supply of cleaning liquid and rinsing liquid; a circulating pump fluidly coupled to the sump for circulating liquid from the sump to the rotating arm; means for removing liquid from the sump said means for removing being fluidly coupled to the sump; means for heating the cleaning liquid and/or the rinsing liquid, if required; means for injecting a detergent suitable for washing glassware into the cleaning liquid which detergent is soluble in the cleaning liquid and forms a washing liquid in combination therewith; and control means comprising: a selector permitting an operator to select an operating cycle from a group consisting of a dishwashing cycle and a glasswashing cycle; and a control circuit electrically coupled to the selector adapted to start the operating cycle after selection by operation of the selector.

32. A dishwasher/glasswasher of any one of claims 1 to 31 when used to clean at least one article selected from the group consisting of a glass, a dish, a cutlery item, a pan, a saucepan, an ashtray, a bowl, a utensil, a cutting board, a crockery item and a container. 28 Dated 15 July, 2003 BRACTON INDUSTRIES (NSW) PTY LIMITED Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON