US2026234A - Portable dispensing device - Google Patents

Description

Dec. 31, 1935. c. A, KNUUTlLA PORTABLE DISPENSING DEVICE Filed NOV. 16, 1955 3 Mm 0. J 9% Z M l v 8 Q lHNl N 3 J 9 fifiQ ,1 Z fi Z W 1 u, 3 7 6 8 M Patented Dec. 31, 1935 UNITED STATES PATENT OFFICE 2 Claim.

This invention relates to improvements in hand operated sprayers. The object of the invention is to provide a sprayingapparatus in the form of a handy tool or device for general spraying purposes.

' One object of the invention is 'to provide a .hand operated .sprayer provided with a double .acting pump for purposes of greater efficiency and vaporization of the spraying liquid.

Another object is toprovide alhandy grip actuated pump piston whereby the pump .and in rfact the entire device may be operated by the .use of only one hand as distinguished from prior .sprayers by the absence .of pumping rods .and the like which usually require the operation of -both hands.

Another object of the invention .is to provide a particularly sturdy compact and efiicien't spraying tool possessing .many novel features of construction, design and operation which contribute materially to- .the efficient operation of the sprayer and which also are devised with a view of practical economic manufacture. Other -objects will appear and novel features be pointed out as this specification proceeds. Accordingly .my invention is embodied in a sprayer constructed and arranged as hereinafter set .forth and as illustrated in the accompanying drawing .in which .Fig. -1 is a perspective view of the spraying device.

Fig. 2 is an enlarged view of .the spraying pump mechanism and adjacent parts with parts omitted and other parts broken .away.

Fig. 3 is a detail sectional view of the spraying nozzle.

Fig.4 is .an end view of the nozzle valve.

.Fig. 5 a detail sectional view of "the suction pipe and itsextension, parts being broken away.

. Referring to the drawing, the spraying device comprises generally a container .6 .for the spraying liquid mounted beneath .a pumping mechanism 1 to which a spraying pipe '8 is attached. The container 6 maybe of any suitable material, transparent or not as maybe desired. The container attaching means to be explained hereafter may be standard screw threads adapted to take the threaded necks of standard glass jars. Thus a broken container is easily replaced, .or one pumping mechanism may be used for different containers with different spraying liquids.

The spraying pump mechanism is distinguished by its compactness, sturdiness and simplicity of parts. Preferably it is contained *within a housing v9 which is :in the .form of -a unitary casting so designed that it may be produced with aminimum of labor. All the operating and movable parts are held Within this housing and protected. Yet the pump mechanism is easily taken apart for repairs or replacements.

Referring now particularly to Figure 2 there are formed within the housing 9 two vertically disposed alined pump cylinders I and l I having unequal cross sectional areas, the ratio being for example two to one. Thus the cross sectional areas of the pump cylinder I!) is in this instance one half of thearea of pump cylinder I]. There is an openpiston rod operating space or chamber 43 between the inner ends of the pump cylinders. It will be pointed out hereinafter that this arrangement of the cylinders is particularly advantageous for purposes of operationand assembling of the parts.

The outer ends of the cylinders communicate with .each other by way of pump passages l2, [.3 and M. The pump outlet is at I and the pump inlet is at IS. The inlet and outlet are controlled by valves l8 and 19 respectively. These valves are preferably ball valves normally closed by springs .as shown at 44 and 34. .20 and 2| are plugs for closing the passages I3 and 12 respectively.

The lower end of the pump cylinder II is closed by a plug '46 which contains the inlet' valve l8 and which also serves as a means for attaching the suction pipe I! which extends down intothe container 6.

Withinthe cylinders there is operated the single .difierential pump piston 22 having packings I! and R8 at its outer ends. A pump arm 23 operating in the aforesaid space 43 engages an aperture 24 in the piston intermediate its ends. The pump arm is carried by an operating lever 25 pivoted in the'housing at 25 and formed with .a handle 2'! and an abutment 28. The latter is engaged'by a spring 29 to operate the lever 25 as will be understood. The pump piston is provided with striker abutments 52 and 53.

The housing 9 is formed with a grip '38 which. extends .rearwardly .in substantial parallel position to thehandle 21. The grip is of inverted U-shaped cross section with an open bottom and two side cheeks 3|, 3|. The pump lever is pivoted between the cheeks 3|, and the over- 50 hanging grip .30 protects and cooperates with .the lever .during the operation of the device. The base "32 .of the housing is circular and carries a depending circular flange 33 which is screw threaded for attaching the container. The 5 flange 33 may be secured by any suitable means not shown.

The sprayer pipe 8 is detachably screwed on to the pump housing by means of a suitable coupling 45 in which the pipe may be rotated in known manner so as to adjust the spraying direction as indicated by the dotted lines in Figure l. The outer end of the pipe 8 carries a nozzle 35 having an outlet 35. Within the nozzle chamber 3! is mounted a nozzle stem 38 having passages 39, 39 in the form of radial slots cut with a fine saw applied at an angle whereby to give the slots a curved form as shown by the dotted lines in Figure 4. When the spraying liquid is forced out through the pipe 8, the

liquid will pass through the passages 39 andthereby be given a whirling rotary motion and broken up, resulting in a very fine spray as it leaves the nozzle. If it is desired to use a stream instead of a spray, the nozzle is detached, the stem removed and the nozzle replaced. The liquid then leaves the nozzle in the form of a fine stream.

Provision has been made for using containers of different depths. The suction pipe, see Figure 5, carries an extension pipe 40 frictionally held in the pipe ll by means of a suitable coupling iii. The extension pipe carries a strainer 52 at the bottom. When a smaller size container is used, the extension pipe is telescoped within the suction pipe and vice versa. The suction pipe with its extension is adjusted so as to reach the bottom of the container to utilize all the liquid therein. The numeral 55 designates an air vent which is bored at a suitable place through the casting to establish communication between the container 6 and the atmosphere.

In operation the container is filled with whichever liquid is to be sprayed and then screwed on to the housing 9. The operator then takes the grip 30 and pump handle 21 in his right hand and then actuates the handle 27 by alternately opening and closing his hand in a manner readily understood. Of course, the operator may use both hands, one to carry and support the device, the other for operating the handle. The movement of the pump handle 21 operates the piston within the cylinders to draw in liquid into the pump and expel it, vaporized, through the sprayer nozzle 35 in an obvious manner.

Specifically the operation of the pump is as follows. On the downstroke of the piston, the liquid in the cylinder H is expelled through the passages l4 and I3, the valve i3 and into the sprayer pipe 8, the inlet valve is being then closed by its spring 44.

However, all the liquid in cylinder II does not pass into the sprayer pipe, because in the downstroke suction is created in the upper cylinder l and in the passage [2 so that the pressure on the outer side of the valve I9 is decreased and also about one-half of the liquid in cylinder H is drawn upwards through the passage i2 into the cylinder it). On the succeeding upstroke, the outlet valve 19 is closed by its spring 34 and the liquid in the upper cylinder is expelled through passage l2 into the sprayer pipe 8. Also on the upstroke suction is created in the cylinder H], the inlet valve [8 is opened and liquid drawn into the pump from the container.

In actual practice the pump becomes full of liquid at the first few strokes of the piston. Thereafter liquid is expelled at every stroke of the piston either in theform of a fine vapor or a fine spray. The pump is very powerful and a pressure exceeding 200 pounds is easily obtained. When used as a stream sprayer, a distance of more than 15 feet is easily spanned.

By reason of the force available, the ease with which the direction of the sprayer pipe may be adjusted and the close quarters in which the sprayer may be operated, spraying operations may be carried out in otherwise inaccessible places or places ordinarily out of reach. 10

The striker abutments 52 and 53 are of particular advantage in that they insure a complete stroke of the piston to the ends of the cylinder and prevent the formation of air pockets which might cause trouble. The striker abutment 53 is mounted in the same manner as the abutment 52 and is therefore likewise adjustable by rotation on the holding threaded stem as shown.

A sprayer as herein disclosed possesses many manufacturing advantages. All the cavities are 2 easily bored. Only three boring directions are required. The piston is inserted from below and the operating lever easily put in place from the rear between the cheeks 3| and then the pivot pin26 placed in position. The spring 29 may be 5 laid in place by inverting the housing before putting in the lever 25. The passage I2 is closed from below, likewise the cylinder 1 I, after which the flange 33 is attached. It will be noted that the open space at 43 is of advantage in insert- 0 ing the piston arm 23 into the piston.

The use of the sprayer is not limited to any particular liquid or purpose. It may be used for spraying insecticides and the like, sanitary liquids, for cleaning and lubricating purposes and 35 many others. It is particularly efficient because of being very powerful and at the same time self contained.

While it has been stated above that in actual practice the pump becomes full of liquid at the first few strokes of the piston, nevertheless this statement must not be construed to mean that it is necessary every time the sprayer is operated to wait for one or two strokes before it can be used. On the contrary, the sprayer hav- 5 ing been used once and its use thereafter discontinued, it is thereafter available for instant use, the pump being full of liquid.

While I have disclosed my invention in the preferred form as herein above set forth, yet I 5 do not intend to limit myself to the exact disclosure otherwise than as may be required by the legitimate and intended scope of the appended claims.

I claim:-

1. A pump mechanism of the character described comprising a one-piece housing forming two vertically disposed longitudinally alined pump cylinders of unequal cross-sectional areas, a single piston operable in said cylinders, said housing having an integral grip portion extending to one side thereof, an open space accessible from the outside formed within said housing below said grip portion, said open space communicating with the said cylinders intermediate the same, an operating pump handle pivoted within said open space, a piston arm on said handle extending into the open space between the cylinders for operative engagement with the said piston, said pump handle being manually operable against the said grip portion to move the piston in one direction, a spring within. the housing for moving the pump handle in the opposite direction, a pump inlet and a pump outlet in said housing in communication with the said cylinders, the said open space within the housing afiording means for positioning therein from the outside the said pump handle and operating spring.

2. A pump mechanism of the character described comprising a one-piece housing forming two vertically disposed longitudinally alined pump cylinders of unequal cross-sectional areas, a single piston operable in said cylinders, said housing having an integral grip portion extending to one side thereof, an open space accessible from the outside formed within said housing below said grip portion, said open space communicating with the said cylinders intermediate the same, an operating pump handle pivoted within said open space, a piston arm on said handle extending into the open space between the cylinders for operative engagement with the said piston, said pump handle being manually operable against the said grip portion to move the piston in one direction, a spring within the housing for moving the pump handle in the opposite direction, a pump inlet in the bottom of said housing, a pump outlet in said housing opposite said pump handle, communications between said cylinder, inlet and outlet, said communications being located wholly within said housing to one side of the cylinder and means at the bottom of the housing for attaching a container thereto.

CHARLES A. KN'UUTILA.

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