[go: up one dir, main page]

US3610783A - Metering devices - Google Patents

Metering devices Download PDF

Info

Publication number
US3610783A
US3610783A US874851A US3610783DA US3610783A US 3610783 A US3610783 A US 3610783A US 874851 A US874851 A US 874851A US 3610783D A US3610783D A US 3610783DA US 3610783 A US3610783 A US 3610783A
Authority
US
United States
Prior art keywords
delivery
pumps
fulcrum
predetermined
metering device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US874851A
Inventor
Antony Harry Croucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3610783A publication Critical patent/US3610783A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00—Control of flow ratio
    • G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
    • G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time

Definitions

  • the invention relates to metering devices for delivering amounts of two or more materials in predetermined ratios and at predetermined rates.
  • the metering device according to the invention is widely applicable in the metering of liquid and flowable materials and has particular use where .the materials are viscous liquids.
  • a difficulty in previous and existing metering devices of this type is the lack of inaccurate control of the actual rates of delivery of the materials, particularly if the operating pressure and/or viscosity is likely to vary.
  • the present invention consists in a metering device for delivering two or more materials characterized in that it comprises a positive displacement delivery pump for each materia], an hydraulic ram for driving the said delivery pumps at predetermined relative speeds, and a variable delivery hydraulic pump for driving the ram at a predetermined speed.
  • the output of the variable delivery hydraulic pump is adjustable by manual control.
  • the delivery pumps are connected by a rocking member having a variable fulcrum to vary the relative speeds of the delivery pumps.
  • the drawing shows an hydraulic power pack comprising a reservoir 1 on which is mounted a synchronous electric motor 2 which drives a variable delivery pump 3, of which the output is adjustable by means of a manual lever 4.
  • the pump 3 draws liquid from the reservoir 1 through a filter 5 and line 6 and delivers it by line 7 to a relief valve 8. From the valve 8 the liquid is normally delivered to an output line 9 including a shutoff valve 10.
  • the line 9 delivers to a solenoid-operated changeover valve 11.
  • a return from the valve 11 to the reservoir is provided in the form of a return line 12.
  • a pair of delivery pumps 17 and 18, which are also double acting and of positive displacement type, are mounted on a common frame member 19 and driven by means of slides 20 and 21 mounted in further frame members and interconnected by a rocking member 22 which is pivoted at 23 to the slide 20 and cooperates with rollers 24 mounted on the slide 21.
  • a variable fulcrum is provided for the rocking member 22 by means of rollers 25 mounted between a pair of trunnions 26 slidably mounted on frame member 27 and adjustable thereon by means of a handwheel 28 carrying a lead screw 29 cooperating with a captive nut 30 mounted on the trunnion
  • the slide 20 is directly driven by the ram 14 so that there is a direct correlation between the output of the pump 17 and the output of the pump 3.
  • the output of the pump 18 is related to the output of the pump 17 in variable manner depending on the position of the rollers 25.
  • variable delivery pump with an accurately controlled delivery, renders the outputs of the delivery pumps [7 and 18 independent of the operating pressure, which depends on the viscosity of the components to be pumped, and which may vary under varying ambient conditions.
  • a metering device for delivering at least two materials in a predetermined ratio and at predetennined rates: the improvement which comprises, a separate positive d
  • the first-mentioned pumps comprise two pumps, and including means connecting said first-mentioned pumps to said means defining the fulcrum at fixed positions spaced from each other and disposed on opposite sides of said fulcrum.
  • manual control means for varying the output of the variable delivery hydraulic pump.
  • a synchronous electric motor driving said variable delivery hydraulic pump at a constant speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Catching Or Destruction (AREA)

Abstract

A metering device for delivering two or more materials in predetermined ratios and at predetermined rates, which is unaffected by changes in viscosity and operating pressure. The device comprising a positive displacement delivery pump for each material, an hydraulic ram for driving the said delivery pumps at predetermined relative speeds, and a variable delivery hydraulic pump for driving the ram at a predetermined speed. In the case when two delivery pumps are provided they may be connected by a rocking member having a variable fulcrum to vary the relative speeds of the delivery pumps.

Description

United States Patent Antony Harry Croucher llornewood," 12, Pine Bank, Tower Road, llindhead, Surrey, England [211 App]. No. 874,851
[72] inventor [22] Filed Nov. 7, 1969 [45] Patented Oct. 5, 1971 [32] Priority Nov. 18, 1968 [3 3] Great Britain 1 1 54634/68 [54] METERING DEVICES Primary ExaminerRobert M. Walker AttorneysRobert E. Burns and Emmanuel J. Lobato ABSTRACT: A metering device for delivering two or more materials in predetermined ratios and at predetermined rates, which is unaffected by changes in viscosity and operating pressure. The device comprising a positive displacement delivery pump for each material, an hydraulic ram for driving the said delivery pumps at predetermined relative speeds, and a variable delivery hydraulic pump for driving the ram at a predetermined speed. ln the case when two delivery pumps are provided they may be connected by a rocking member having a variable fulcrum to vary the relative speeds of the delivery pumps.
PATENTEUUET Sign if i3 ANTONY HARRY CROUCHER METERING DEVICES The invention relates to metering devices for delivering amounts of two or more materials in predetermined ratios and at predetermined rates.
The metering device according to the invention is widely applicable in the metering of liquid and flowable materials and has particular use where .the materials are viscous liquids.
A difficulty in previous and existing metering devices of this type is the lack of inaccurate control of the actual rates of delivery of the materials, particularly if the operating pressure and/or viscosity is likely to vary.
The present invention consists in a metering device for delivering two or more materials characterized in that it comprises a positive displacement delivery pump for each materia], an hydraulic ram for driving the said delivery pumps at predetermined relative speeds, and a variable delivery hydraulic pump for driving the ram at a predetermined speed.
Preferably, the output of the variable delivery hydraulic pump is adjustable by manual control.
Conveniently, in the case of two delivery pumps, the delivery pumps are connected by a rocking member having a variable fulcrum to vary the relative speeds of the delivery pumps.
The invention will be further described with reference to the accompanying diagrammatic drawing which illustrates a preferred embodiment of the invention.
The drawing shows an hydraulic power pack comprising a reservoir 1 on which is mounted a synchronous electric motor 2 which drives a variable delivery pump 3, of which the output is adjustable by means of a manual lever 4. The pump 3 draws liquid from the reservoir 1 through a filter 5 and line 6 and delivers it by line 7 to a relief valve 8. From the valve 8 the liquid is normally delivered to an output line 9 including a shutoff valve 10. The line 9 delivers to a solenoid-operated changeover valve 11. A return from the valve 11 to the reservoir is provided in the form of a return line 12.
From the valve 11, two lines 13 run to opposite ends of a double-acting hydraulic ram 14. An extension 15 from one end of the ram 14 cooperates with limit microswitches 16 to reverse the operation of the ram at the ends 'of the stroke by changing over the valve 11.
A pair of delivery pumps 17 and 18, which are also double acting and of positive displacement type, are mounted on a common frame member 19 and driven by means of slides 20 and 21 mounted in further frame members and interconnected by a rocking member 22 which is pivoted at 23 to the slide 20 and cooperates with rollers 24 mounted on the slide 21. A variable fulcrum is provided for the rocking member 22 by means of rollers 25 mounted between a pair of trunnions 26 slidably mounted on frame member 27 and adjustable thereon by means of a handwheel 28 carrying a lead screw 29 cooperating with a captive nut 30 mounted on the trunnion The slide 20 is directly driven by the ram 14 so that there is a direct correlation between the output of the pump 17 and the output of the pump 3. The output of the pump 18 is related to the output of the pump 17 in variable manner depending on the position of the rollers 25. l
The relative outputs between the pumps 17 and 18 is thus set by means of the handwheel 28, and the actual output of the pump 17 is then set by means of the lever 4 controlling the output of the variable delivery pump 3.
The particular advantage of the system described is that the use of a variable delivery pump, with an accurately controlled delivery, renders the outputs of the delivery pumps [7 and 18 independent of the operating pressure, which depends on the viscosity of the components to be pumped, and which may vary under varying ambient conditions.
Various modifications may be made within the scope of the invention.
I claim:
1. In a metering device for delivering at least two materials in a predetermined ratio and at predetennined rates: the improvement which comprises, a separate positive d|splacement delivery pump for each respective one of at least two materials to be delivered in predetermined volume ratios and at predetermined rates, a rockable member operably connecting the delivery pumps, means defining a fulcrum for the rockable member means connected to the said means defining the fulcrum for varying the position of the fulcrum to vary the relative speeds of the delivery pumps, a hydraulic ram driving the delivery pumps at relative speeds determined by the position of the fulcrum, a variable delivery hydraulic pump for driving the ram at a predetermined speed, and conduit means connecting the variable delivery pump to said hydraulic ram.
2. In a metering device according to claim 1, in which the first-mentioned pumps comprise two pumps, and including means connecting said first-mentioned pumps to said means defining the fulcrum at fixed positions spaced from each other and disposed on opposite sides of said fulcrum.
3. In a metering device according to claim 1, manual control means for varying the output of the variable delivery hydraulic pump.
4. In a inetering device according to claim 1, a synchronous electric motor driving said variable delivery hydraulic pump at a constant speed.
5. In a metering device according to claim 1, means connecting one of the first-mentioned pumps to said ram for conjoint movement therewith.

Claims (5)

1. In a metering device for delivering at least two materials in a predetermined ratio and at predetermined rates: the improvement which comprises, a separate positive displacement delivery pump for each respective one of at least two materials to be delivered in predetermined volume ratios and at predetermined rates, a rockable member operably connecting the delivery pumps, means defining a fulcrum for the rockable member means connected to the said means defining the fulcrum for varying the position of the fulcrum to vary the relative speeds of the delivery pumps, a hydraulic ram driving the delivery pumps at relative speeds determined by the position of the fulcrum, a variable delivery hydraulic pump for driving the ram at a predetermined speed, and conduit means connecting the variable delivery pump to said hydraulic ram.
2. In a metering device according to claim 1, in which the first-mentioned pumps comprise two pumps, and including means connecting said first-mentioned pumps to said means defining the fulcrum at fixed positions spaced from each other and disposed on opposite sides of said fulcrum.
3. In a metering device according to claim 1, manual control means for varying the output of the variable delivery hydraulic pump.
4. In a metering device according to claim 1, a synchronous electric motor driving said variable delivery hydraulic pump at a constant speed.
5. In a metering device according to claim 1, means connecting one of the first-mentioned pumps to said ram for conjoint movement therewith.
US874851A 1968-11-18 1969-11-07 Metering devices Expired - Lifetime US3610783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5463468 1968-11-18

Publications (1)

Publication Number Publication Date
US3610783A true US3610783A (en) 1971-10-05

Family

ID=10471632

Family Applications (1)

Application Number Title Priority Date Filing Date
US874851A Expired - Lifetime US3610783A (en) 1968-11-18 1969-11-07 Metering devices

Country Status (3)

Country Link
US (1) US3610783A (en)
DE (1) DE1957919A1 (en)
GB (1) GB1227159A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926345A (en) * 1972-02-03 1975-12-16 Stabilator Ab Device for the batching of media
US3932067A (en) * 1974-02-27 1976-01-13 Micromeritics Instrument Corporation Liquid chromatography apparatus and method
FR2444818A1 (en) * 1978-12-18 1980-07-18 Hedrich Vakuumanlagen Wilhelm CONTROL DEVICE FOR METERING PUMPS AND / OR SIMILAR APPARATUS OPERATING BY MOVEMENTS OF PISTONS WITH DIFFERENT REPORTS OF OPENING AND CLOSING RATES FOR THE SYNCHRONOUS SENDING OF UNEQUAL QUANTITIES OF DIFFERENT SUBSTANCES
US4265858A (en) * 1976-03-31 1981-05-05 Nordson Corporation Metering and mixing apparatus for multiple component
US4312463A (en) * 1980-02-04 1982-01-26 Daby Lance H Proportional pumping apparatus
US4505405A (en) * 1980-07-24 1985-03-19 Graco Inc. Proportional pumping system
US5158438A (en) * 1991-08-02 1992-10-27 Graco Inc. Quick mount pump frame
US10705554B2 (en) 2017-04-28 2020-07-07 Graco Minnesota Inc. Solenoid valve for a portable hydraulic power unit
USD977426S1 (en) 2019-12-13 2023-02-07 Graco Minnesota Inc. Hydraulic power pack

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169703A (en) * 1936-10-26 1939-08-15 Richard C Mason Pumping apparatus
US2752989A (en) * 1952-10-21 1956-07-03 Jr Hugh Powell Jenkins Reaction chamber and apparatus for delivering liquid propellants thereto at variable ratios and variable rates of delivery
US3022738A (en) * 1959-04-20 1962-02-27 Krute Everett Archie Pump systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169703A (en) * 1936-10-26 1939-08-15 Richard C Mason Pumping apparatus
US2752989A (en) * 1952-10-21 1956-07-03 Jr Hugh Powell Jenkins Reaction chamber and apparatus for delivering liquid propellants thereto at variable ratios and variable rates of delivery
US3022738A (en) * 1959-04-20 1962-02-27 Krute Everett Archie Pump systems

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926345A (en) * 1972-02-03 1975-12-16 Stabilator Ab Device for the batching of media
US3932067A (en) * 1974-02-27 1976-01-13 Micromeritics Instrument Corporation Liquid chromatography apparatus and method
US4265858A (en) * 1976-03-31 1981-05-05 Nordson Corporation Metering and mixing apparatus for multiple component
FR2444818A1 (en) * 1978-12-18 1980-07-18 Hedrich Vakuumanlagen Wilhelm CONTROL DEVICE FOR METERING PUMPS AND / OR SIMILAR APPARATUS OPERATING BY MOVEMENTS OF PISTONS WITH DIFFERENT REPORTS OF OPENING AND CLOSING RATES FOR THE SYNCHRONOUS SENDING OF UNEQUAL QUANTITIES OF DIFFERENT SUBSTANCES
US4317647A (en) * 1978-12-18 1982-03-02 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. Kg Dosing system
US4312463A (en) * 1980-02-04 1982-01-26 Daby Lance H Proportional pumping apparatus
US4505405A (en) * 1980-07-24 1985-03-19 Graco Inc. Proportional pumping system
US5158438A (en) * 1991-08-02 1992-10-27 Graco Inc. Quick mount pump frame
US10705554B2 (en) 2017-04-28 2020-07-07 Graco Minnesota Inc. Solenoid valve for a portable hydraulic power unit
US11162482B2 (en) 2017-04-28 2021-11-02 Graco Minnesota Inc. Portable hydraulic power unit having a pump fixed to an exterior side of a fluid supply tank
US11441551B2 (en) 2017-04-28 2022-09-13 Graco Minnesota Inc. Portable hydraulic power unit
USD977426S1 (en) 2019-12-13 2023-02-07 Graco Minnesota Inc. Hydraulic power pack

Also Published As

Publication number Publication date
GB1227159A (en) 1971-04-07
DE1957919A1 (en) 1971-02-04

Similar Documents

Publication Publication Date Title
US3610783A (en) Metering devices
US2576747A (en) Liquid dispenser with means to vary a measured discharge
US4172033A (en) Artificial kidney proportioning system
US3554673A (en) Syringe pump
US4150769A (en) Apparatus for metering, mixing and dispensing fluids
US2914219A (en) Apparatus for dispensing a mixture of two liquids in any continuously variable ratio
US3672389A (en) Liquid proportioning device
GB1296354A (en)
US2841991A (en) Stroke adjustment device
US2954737A (en) Adjustable pump and liquid proportioning device
EP0226070A3 (en) Pump arrangement for delivering measured quantities of at least two components
US3107034A (en) Liquid supply and mixing system
US4556367A (en) Solvent delivery system
CN220667731U (en) Double-liquid grouting pump with adjustable proportion
GB1417204A (en) Device for the mixing of liquid media
US3613465A (en) Ratio linkage assembly
US3899106A (en) Liquid metering device
GB1268111A (en) An apparatus for metering and dispensing liquids
US1872503A (en) Proportional pumping apparatus
US3514222A (en) Metering piston pump
US2320727A (en) Hydraulic speed control apparatus
US2280656A (en) Feeding device
US2847940A (en) Measuring pumps
DE2608664A1 (en) DEVICE FOR GENERATING A UNIFORM CONVEYOR FLOW
US3124270A (en) Cornell