US3332585A - Adjustable syrup pump with pump casing within container - Google Patents

Description

Ju1y25,1967 T Ex l' 3,332,585

ADJUSTABLE SYRUP PUMP WITH PUMP CASINO WITHIN CONTAINER 2 SheetsSheet l Filed March 25. 1966 THOMAS E. COX

MJ/w54 ATTORNEY T. E. COX

July 25, 1967 ADJUSTABLE SYRUP PUMP WITH UMP CASING WITHIN CONTAINER Filed March 23. 1966 2 Sheets-Sheet 2 v ...il

FIG. 3

` INVENTOR. THOMAS E. COX

ATTORNEY United States Patent 3,332,585 ADJUSTABLE SYRUP PUMP WITH PUMP CASING WITHIN CONTAINER Thomas E. Cox, Pot Springs Road, Timonium, Md. 21093 Filed Mar. 23, 1966, Ser. No. 536,883 8 Claims. (Cl. 222-309) ABSTRACT F THE DISCLOSURE A hand operated syrup dispensing pump having a pump chamber mounted beneath a syrup recepticle lid, having a ball check valve mounted at the terminus of an intake part extending into the syrup and having a ball check valve within a dispensing chamber located next to the pump chamber. The pump uses a solid, disk shaped piston with an O-ring about is periphery and has a spring biased plunger handle assembly situate above the lid and threadably engaging the pump chamber.

This invention relates to dispensing devices and more particularly to improved syrup dispensing pumps for use in soda fountain and the like.

During recent years, the methods and techniques for marketing popular foods or snacks have undergone considerable change. Food service facilities have been de` signed and innovated to provide for high volume sales of quickly prepared and low priced food refreshment items. In order to attain acceptable profits in this newly evolved and specialized consumer market, the operations of food preparation and service outlets have been carefully refined and integrated to afford highest possible material and labor eiliciencies and consequent l-ow unit costs.

The instant invention looks, within the ambit of modern marketing demands, to the provision of hand operated positive displacement pump units for the dispensation of avored syrups used in making soft drinks, sodas, milk shakes and the like. Conventional syrup pumps have been found to impose undesirable ineiciences Where high volume food sales are contemplated. These ineiciences are particularly apparent where reliable and accurate volumetric dispensing is required in combination with the pump structures representing a relatively low capital investment` For instance, in a typical modern high volume sales outlet, a single syrup pump having dispensing volume integrity may currently provide a monthly material savings amounting to about nine and one-half dollars.

The union of low unit cost, high accuracy, low maintenance cost, structural integrity and reliability characteristics for the pumps has not heretofore been realized, however, in part because the user environment imposes several additional functional criteria which have limited design flexibility. There follows a discussion of certain of these criteria.

Where conventional, relatively infrequent pump use is contemplated, a small number of serving attendants will, over an extended period of time, combine progressive pump adjustments and personal techniques to attain a confidence in the accuracy of dispensed volume at each actuation of the pumps. Different techniques are generally required for different viscosities of syrup. In high volume sales outlets, however, a dozen or more serving attendants having a relatively limited tenure will be called upon to both actuate and clean the syrup pumps at substantially frequent intervals. Labor overhead cost considerations will not permit ineicient periodic pump adjustments and a technique developing training period. Consequently, hand operated syrup pumps will be subjected to a myraid of hastily imposed pumping forces. Such utilization results ice too often in an expensive over-proportioning, due principally to a necessary multiple actuation of the pump Where an operator is uncertain of the syrup v-olume dispensed.

Confidence in pump integrity and dispensing accuracy are also diicult to obtain where Syrups varying in viscosity are utilized in the dispensing units. Acceptable actuating techniques are dicult to develop Where requisite pump handle pressures vary with viscosities. Where pump handle pressures are too high, operators will tend to ignore calibration and partially actuate the pump numerous times. As a corrective procedure, lever and fulcrum assemblies are often installed where syrups such as those flavored chocolate are dispensed in view of their more viscous nature, however, such additions slow pump reaction times and add to costs.

The pumps must also have positive priming characteristics in order to minimize time delays in syrup reloading. Conventional pumps in most cases establish quick priming by the expedient of submerging piston and chamber assemblies within the syrup held in its receptacle. This practice, however, necessitates the continual maintenance of a considerably higher fill level than desired. Ideally, the average storage or shelf life of syrup within a pump receptacle should be restricted in order to afford a degree of taste quality control. For this and other reasons, syrup pump receptacles generally are not fabricated having large capacities. Lower refill capacities will require more frequent replenishment and blending of aged and fresh syr-ups. Additionally, syrup remaining in the receptacle must be removed and stored during required frequent dispenser cleaning operations. Such rehandling necessarily imposes time and sanitation penalties.

The syrups dispensed from the pumps are generally concentrated sugar solutions having flavor additions. As such, they are suscepticle to spoiling, fermenting and the like resulting from the action of bacteria, molds and yeasts. It follows that many of the Syrups provide an effective media for the growth of germ culture. As .a consequence, therefore, frequent cleaning and sterilization of dispenser pumps and receptacles is mandatory. Accordingly, the pump configuration ideally must be easily demountable into a minimum number of readily cleaned parts. Further in this regard, pump components having separate functions should be united whenever possible to provide easily cleaned unitary structures. The number and extent of components coming into contact with syrups should be minimized. Also the interior surfaces of components contacting syrups should ideally be smooth and regular in order to facilitate removal of syrup residue. Pump designs not incorporating these attributes will impose overhead cleaning time penalities and often lead to employee supervisory problems.

Looking to the desired structural criteria impressed upon dispenser pump design by the above discussed prole of modern user activity, it will be seen that syrup pumps must now combine the features of rugged simplicity, enhanced reliability and, most important, they must provide accuracy under continued and varying use. Dispensing units heretofore offered to commerce have failed to combine all of the above criteria.

Pump designs incorporating submerged displacement chambers, while readily primed, must move syrup uids upwardly through dispensing conduits, thereby establishing a head often causing leakage at the chamber and imposing a requirement for higher pump handle pressures. The latter pressures particularly become apparent where more viscous Syrups are dispensed. In many designs, Huid path valving, while desirably simple and inexpensive, has introduced slight fluid pressure variations leading to irregular resistance to -pump handle pressure and consequent introduction of unwanted variation in dynamic forces imposed upon the uid delivery path. Such variations in many instances will alter the actuation times of the valves. Some typical pumps, as a result of design simplification, incorporate irregular piston surfaces within their positive displacement chambers, thereby contributing to variations in volume delivery.

To retain acceptable accuracies under the use by numerous individuals, it is also necessary that pump positive displacement chambers be uniformly recharged after each stroke; that the pump operator be readily apprised of full stroke completion and that handle stroke pressures be minimized. v

The inventive pump as now presented offers solution to the deficiencies outlined above and others by providing a dispensing pump of advantageous low cost and simple configuration.

The pump is particularly characterized by its reliability and dispensing accuracy under varying conditions of use and with syrups having varying viscosities.

Additionally, the pump may be used in dispensing Syrups of both relatively light and heavy viscosity without the addition of implements adapted to relieve excessive handle stroke pressures.

The inventive pump is further characterized in having only a small number of parts of simple and sturdy configuration, each of which is adapted to be easily cleaned by unskilled personnel.

Another object of the invention is to provide a syrup pump which may be readily disassembled by unskilled personnel without the aid of any tools.

As an additional object, the invention provides an accurate syrup pump having a positive displacement chamber normally situate above the syrup to be dispensed and which may be primed simply by the actuation of its external handle.

Additionally, the pump utilizes a raised positive displacement chamber adapted for use with a disk form piston and which is removably mounted upon the underside of a syrup receptacle lid thereby minimizing liuid dispensing head.

Another object of the invention is to provide a syrup pump having a raised positive displacement chamber, a syrup delivery tube connected thereto, extending into the syrup and having an easily removed ball check valve at its terminus.

As another object, the pump is characterized in its `capability to hold fluid throughout its operating components Without such leakages as would induce dispensing inaccuracies.

With these and other objects in view, the invention consists in the construction, arrangement and combination of the various parts of the device whereby the objects contemplated are attained, Ias hereinafter set forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

FIGURE l is a perspective View of a syrup pump and lid assembly according to the present invention with portions cut away to reveal internal structure;

FIGURE 2 is an exploded perspective view illustrating the disassembled interrelationship of the individual components of the inventive pump arrangement; and

FIGURE 3 is a perspective view of another embodiment of the present syrup pump invention with portions cut away to reveal internal structure.

STRUCTURE Referring to the basic and preferred embodiment, yas shown in FIGURE l, the pumping unit is depicted generally at in attachment with a rectangular soda fountain syrup container cover plate or lid 12. The lid 12 isV placement pumping chamber 16 and a cylindrically shaped uid outflow valving compartment 18 juxtaposed to and parallel therewithv The body member 15 is shown formed of two stainless steel cylinders metallically joined along a tangent, for instance by silver soldering. It will be apparent that the member may asume a variety of exterior shapes such as a single block form and may be fashioned of other materials such as plastic.

The member 15 is held in place beneath the lid 12 by a circular thrust collar 19 extending through a correspondingly circular opening 21 in the lid 12 and threadably engaging a tapped inner perimeter 22 of the open end of pumping chamber 16. The collar 19 has a hanged portion or shoulder 24 extending over and resting upon the upward surface of lcontainer lid 12. Formed along the central axis of the thrust collar is an upstanding tubular neck portion 25 which is, in turn, adapted to Slideably engage and axially align a piston rod 2'7. The lowermost end 28 of rod 27 is threaded for a preferably tight attachtment with a disc shaped piston 30.

The piston 30 has two design features which particularly serve to enhance the accuracy and reliability of pump dispensation. The first of these features is a relatively flat fluid contacting surface 31 at the lower face of the piston and the second feature is the presence of an O- ring 32 situate within a slot disposed about the outer circumference of the piston. The O-ring 32 will be seen to Slideably engage the cylindrical surface of the chamber 16.

The opposite or upper end 34 of the piston rod 27 is threaded to engage a tapped bore located along the axis of a push-rod cap 35. A hand tightened union is preferred at this connection. As is evident, the cap serves to transmit hand pressures through the piston rod into the pumping mechanism. Cap 35 is necked down at 36 to rigidly receive an exterior cylindrical guide sleeve 38 and is necked again at 37 for providing an appropriate alignment to a helical spring 40. A permanent press lit is preferred in connecting the guide sleeve 38 to the cap 35. An interior cylindrically shaped guide sleeve 42 having a lesser diameter than guide sleeve 3S is attached to thrust collar 19 -by insertion within a recessed annular slot 20 machined or formed Within the upper face of the collar, Guide sleeve 42 is also fashioned having a portion 43 of its external surface knurled so as to afford a non-slip gripping surface for use in manually detaching or unscrewing the collar 19 from chamber 16. A permanent press fit attachment is preferred in connecting the guide sleeve 42 to the thrust collar 19. Annular slot 20 also serves to seat the helical spring 40. It will be apparent from the foregoing that the spring 46, `when confined between cap 35, collar 19 and the guide sleeves 38 and 42, serves to impart a continual upward bias to the disc piston 30 through the rod 27. Generally, a spring providing a compressive resistance pressure of about nine pounds has been found suitable for use in pumping all common soda fountain syrups with equal facility.

Slideably mounted upon the piston rod 27 and situated intermediate the lowermost surface of thrust collar 19 and disc piston 30 is a tubular shaped member 33. As is indicated in the drawings, the respective ends of tube 33 abut respectively against collar 19 and the piston 30, thereby limiting the upstroke travel of the latter. It will be apparent that when selected having an appropriate length, the tube 33 serves as a simple and convenient means of calibrating the amount of iluid displaced from the chamber. The tube may be formed of plastic or other suitable material. l

Also mounted upon and extending through the upward or external surface of container lid 12 is a dispensing conduit or tube 45 having a port 46 through which syrup is dispensed. A cant or bend may be made in tube 45 to facilitate dispensing access, the degree of bend being dependent upon the configuration of the soda fountain support structure. A removable cap 47 formed from plastic or like material is pressed over the terminus of tube 45 t-o serve as a suitable end closure diverting fluid through port 46. For most applications the dispensing tube or spout arrangement as illustrated will provide a dripless operation; however, in instances where the tube 45 is highly sloped toward the horizontal, a reduced port diameter or, a reduced or constricted spout diameter in the vicinity of port 46 will afford dripless operation. Dispensing tube 45 is permanently ailixed to the lid 12 by silver soldering or the like at the point of its transition through an aperture at 48 in the lid. At the underside of the lid, the dispensing tube is terminated with a V-shaped cut shown at 50. The terminus 5() serves the dual purpose of providing a modicum of lateral support for the cylinder member and, more importantly, as a simple and inxpensive but highly effective upper caging member for the ball check valve compartment 18. Terminus 50 should be of such dimension as to impose substantially no fluid back pressure during fluid flow holding the ball 51 at its upward extreme position. A tubular shaped seal 49 fashioned of plastic or suitable flexible material is removably positioned over tube 45 beneath lid 12. A counterbore 53 may be formed at the opening of compartment 18 thereby providing a seat retaining the seal in its proper position.

Shown in its closed or rest position, the ball 51 is seated upon an angular constricting shoulder 54 formed in compartment 1S, serving when so situate to prevent fluid backilow through a conduit 56 communicating with the thickened bottom portion 17 of cylinder 15 at opening 55. A plastic plug 57 is removably inserted within conduit 56 to facilitate cleaning.

In fluid communication with the pumping chamber 16, a suction tube 60 is permanently press tted into a corresponding circular bore having an opening 61 in the chamber bottom portion 17. Tube 60, depending from the chamber into the syrup, is of length suitable to extend substantially to the bottom of the fluid or syrup container.

A ball check valve, positioned at the terminus or bottom of suction tube 60, comprises a cylindrical valve housing 64 having at its lower extremity a fluid inlet 65 and a tapered annular ball seat 66 providing a gravity seat or rest for `ball 67. A portion of the upper internal surface of housing 64 is tapered as shown at 69 and is provided an internal cut or groove just below the taper for retaining a conventional, flexible O-ring 7i). Suction tube 60 is formed having a mating taper at 72 which acts as a male counterpart to the taper 69. Beneath the taper 72, tube 60 retains a lesser external diameter for insertion within the housing `64 and is terminated in a V-shaped cut 73 similar to that in tube 45 serving as the upper caging member for the ball valve. It will be apparent that mating tapers 69 and 72 act to precisely position the housing 64 upon suction tube 60.

The presence and quality of the above-described ball check valve at the lower portion of suction tube 60 has been discovered to be of critical importance to both the accuracy and reliability of the pumping mechanism. The travel of the ball 67 between seat 66 and cage member 73 should be accurately reproduced at every pump stroke and the valve must be substantially leak free. The configuration now presented has been found to ideally meet these criteria. The O-ring seal 70, while contributing to the security of the unit against leakage, has been found adequate to retain the housing 64 upon tube 60 without progressive downward slippage. Additionally, the mated tapers 69 and 72 are found to simplify the task of uniformly positioning housing 64. Alternately, seal 70 may also nest within a groove cut or formed in the lower end of tube 60. Such criteria are not mandatory in the case of the upper check valve at the outflow compartment 18.

OPERATON Manual pressure upon the plunger cap 35 compresses spring 40 and transmits a plunging force through rod 27 to the disc piston 3l). Piston 3i), in turn, compressively forces uid within pumping chamber 16 through opening 55 and conduit 56 into the outflow compartment 18. The operator is sim-ply and readily apprised of stroke completion as piston 30 contacts the floor 17 of the chamber 16. Force distribution at this contact is such that the pump mechanism is almost immune from damage due to excessive plunging forces. As fluid passes through compartment 18, ball 51 is raised permitting fluid to pass along dispensing tube 45 and exit through port 46. Simultaneously during the piston downstroke, fluid situate within suction tube 60 is compressed but held in position by the closure of inlet by ball 67.

Upon operator release of the plunger cap 35, compressed spring 40 Will rapidly return the piston 30 to its extreme upward position as illustrated in FIGURE l. As piston 30 moves upward, the compartment 16 is gradually evacuated, simultaneously permitting inflow through suction tube inlet 65 and the recharging of chamber 16. Reversal of piston movement will also cause the seating of ball 51 within compartment 18 thereby eliminating backflow. It should be observed that the pump is calibrated on the upstroke by piston travel limiting tube 33 and that the force intermittently exerted upon tube 33 is that imposed uniformly by the upward pressure of spring 40. As a consequence, pump activity will rarely, if at all, destroy or impair the Calibrating mechanism. Any desired dispensing volume change is effected simply by inserting a selected different length of tubing 33.

It should be further noted that during the piston upstroke, vacuum charging will refill not only the whole of chamber 16 but also the distribution or outflow conduit 56 substantially to the ball and seat closure at 54. As a result, the pump enjoys a self-correcting quality in instances where a previous stroke has been incomplete or defective inasmuch as the vacuum ll or recharge will accommodate lthe variations in chamber volume. This recharging characteristic also points to the advantage gained by the instant design in utilizing a disc shaped piston 30. A cup shaped piston configuration would inherently lead to fluid volume variations in recharging the chamber 16. The inventive design also is characterized in not positioning ball check valves upon moving parts of the pump structure. When so positioned, valve rates of closure are altered due to extraneous dynamic forces on the balls. Further, inasmuch as the fluid flow path from the chamber 16 to the dispensing port 45 is relatively short and involves only a minor fluid lift, the pump is somewhat immune from unwanted handle pressure variation otherwise caused by varying syrup viscosities. It will also be apparent that the uniform rate of piston return imposed by spring 4t) provides a desired reproducible fluid recharging environment. The combination of the above operational features has been found to produce a syrup pum-p having somewhat remarkably accurate and reproducible volumetric dispensing qualities.

DISASSEMBLY The pump unit is disassembled for cleaning Without the use of the simplest of tools, and the disassembled components, while readily cleaned, will be seen to be conveniently few in number. Referring to FIGURE 2, disassembly is commenced by manually unscrewing the capsleeve member 35-38 from piston rod 27. O-ring 27 will adequately restrain rod 27 from sympathetic rotation. Upon removal of the above unit, the spring 40 lifts out. The knurled surface of sleeve-collar member 43-19 is then unscrewed from cylinder 15. The cylinder 15-suction tube 60 assembly is then easily pulled from connection with dispensing tube 45. Rod 27-piston 30- with O-ring 32 attached is -slipped from chamber 16 and ball 51 is rolled from compartment 18. Check valve housing 64 is then simply pulled oil suction tube 60 and ball 67 is rolled out. Plastic plug 57 may be pulled from conduit 56, seal 49 from tube 45 and plastic cap 47 from dispensing spout 45. It will be apparent to those skilled in the art that the thusly disassembled parts lend themselves to economic cleaning procedures. All tubular members are readily brush cleaned and no unusual surfaces are exposed to syrup. The presence of an O-ring 32 upon the disc piston provides the added advantage restricting syrup residue from collecting above the lower surface of the piston.

ALTERNATE EMBODIMENT Variations from the preferred embodiment as hereinbefore described will become apparent to those skilled in the art. Referring to FIGURE 3, an alternate arrangement of components is illustrated which may be considered where very high volume manufacturing is contemplated. Similar to the preferred arrangement, the hand plunger assembly is mounted upon the container lid 12 and comprises a push-rod'cap 80 having a cylindrical guide sleeve 81 formed integrally with it. A thrust collar 82 is removably inserted through the lid 12 and is formed having an interior guide sleeve portion 83. Guide sleeves 81 and 83 serve to align a helical spring 84. A push rod 85 is removably threaded to the cap 80 at S6, is slideably supported within a central bore in collar 82 and is tightly threadably attached to a disc piston and O-ring assembly 88 at its lower terminus 87. Piston travel within the pump chamber is limited by a shoulder 96. The pump body member is fashioned as a cylinder 89 closed at one end to provide a pump chamber. The body member is attached to the underside of container lid 12 by sliding a dish shaped spring washer 90 over the lower protruding portion of collar 82. The upper edge of the spring washer is shown urged against the lower lid surface and its lower edge abuts against the top of cylinder 89. Beneath washer 9G is a fiat annular cylinder lid 91 having protruding male inserts or tabs 92 about its periphery. Tabs 92 are insertable within corresponding bayonet joint slots 93 disposed within the upper wall of cylinder 89. Lid 91 is retained upon collar 82 by virtue of a simple protruding wire spring 94 inserted within a retaining groove 95 at the bottom of the collar. It will be apparent that the body member 89 is secured to the lid 12 by virtue of lid 91 being compressively held between the spring washer 9i) and cylinder 89 assembly and wire spring 94.

A singular dispensing tube 97 is insertable through an elipt-ical hole 98 in lid 12 4and is permanently attached to cylinder 89 at 99. Where stainless steel is selected for fabricating the pump, a silver solder union will be found adequate. The pump chamber and dispensing conduit are united through a conduit or mated bore 100.

At the lower terminus of dispensing tube 97 is a ball check valve housing 102 having an O-ring and internal slot 103 which along with the mated tapers at 104 serve to hold, seal and position the valve assembly upon tube 97. Ball 105 rests alternately upon an angular cut 105 on tube 97 and annular shoulder 108 surrounding inlet port 107. Situate over the top portion of tube 97 is a removable dispensing assembly comprising a cylindrical housing 110 which is slideable over a shoulder insert 111 mounted over the end of tube 97. Insert 111 may be formed of a plastic in order to provide a suicient press tight relationship between it, tube 97 and housing 110. Within the housing 110 rides a ball 112 biased downwardly by a helical spring 113. The spr-ing 113 is held in appropriate alignment by insertion within a recess 114. A fluid exit port 115 is positioned `within the side Vof housing 110 above the nexted ball 112. Spring biasing is necessary within housing 110` where the protruding portion of tube 97 is steeply oriented toward the horizontal.

It will be apparent that the embodiment described operates in a manner similar tothat of the earlier described preferred embodiment. The lower ball check valve is open and the upper one closed during spring actuated piston return. As the piston descends, the upper check valve is open and the lower check valve is closed. Also, the pump may be calibrated by the insertion of a washer r the like over rod 85 above the disc piston 88.

Vv/hile there have been shown andv pointed out the fundamental novel features of the invention as applied particularly to a preferred embodiment, -it will be understood that various omissions and substitutions in the form of detail of the device shown and its method of manufacture may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

I claim:

1. A hand operated positive displacement pump for dispensing a predetermined quantity of syrup from within a receptacle having a removable lid comprising:

(a) a body member mounted upon the underside of said lid, situate remotely from the surface of said syrup within said receptacle 4and having:

(i) a positive displacement pump chamber,

(ii) an outflow compartment having fluid cornmunication with the bottom portion of said chamber;

(b) a solid, disc-shaped piston slideable within said pump chamber and having sealing means disposed intermediate the periphery of said piston and the `walls of said chamber so as to establish an enhanced pump suction within the chamber;

(c) la hand actuated reciprocating assembly removably mountable at the upper surface of said lid so as to communicate with said pump chamber and comprising: Y

(i) a supporting collar member removably mountable upon the upper surface of said lid and having a sleeve adapted to receive and vertically align a compressible spring means,

(ii) a connector rod slideably supported by said collar member and extensible therethrough so as to protrude into said chamber and connect in force transferring relationship with said piston,

(iii) a sleeved pump plunger cap connectable in force transferring relationship with the upward end of said connector rod, said cap being slideably extensible about said collar sleeve, adapted to be urged outwardly by said spring means and having its outward travel restricted by the travel of said connector rod;

(d) syrup intake conduit means in fluid transfer cornmunication with the bottom of said chamber and extending into and having a terminus below the syrup level of said receptacle;

(e) an inlet ball check valve removably mounted upon said terminus of sa-id intake conduit means and adapted to permit only fluid inflow;

(f) tubular syrup dispensing conduit means fixed to and extending through the outward surface of said lid, terminating in a dispensing port and adapted for removable connection in fluid transfer relationship with said body member outow compartment;

(g) an outflow check valve disposed within said outflow compartment and adapted to permit only uid outflow through said port.

2. The pump of claim 1 in which said sealing means of said disc piston is an annulus formed of exi'ble material and disposed about the periphery of said piston intermediate said piston and the walls of said chamber.

3. The pump `of claim 1 including Calibrating means mounted upon the upward :surface of said piston for limiting the upward stroke of said piston, whereby volumetric calibration of the amount of fluid delivered to said chamber and dispensed per pistou stroke from the pump is provided.

4. The pump of claim 1 wherein said outflow check valve is of the ball 4check variety.

5. The pump of claim 1 in whichsaid inlet ball check valve comprises:

(a) a housing having a cylindrical interior portion;

9 (b) a lower inlet port; (c) a ball adapted to seat over by -gravity and close said port; (d) an upper opening adapted to slideably receive said terminus of said syrup intake conduit means; and (e) an annulus formed of flexible material seated intermediate the peripheries of said cylindrical interior portion and said intake conduit means for retaining in fluid tight relationship said housing upon said conduit means.

6. The pump of claim 5 in which:

(a) said syrup intake conduit means is tubular; and

(b) said intake terminus is adapted to provide an upow limit to the movement of said ball.

7. The pump yof claim 6 in which said intake terminus is formed having lan inlet opening of area sucient to permit uid ow upwardly through said inlet ball check valve without substantial variation in flow resistance.

8. The pump of claim 6 in which:

(a) said body member is removably attached to the underside of said lid lby said collar member, said collar member being removably seated over the up- References Cited UNITED STATES PATENTS 880,370 2/ 1908 Earl Z22-309 X 1,091,401 3/1914 Smith 222-385 2,078,483 4/1937 Weal et lal 222-385 X 2,205,875 6/ 1940 Coey et al. y222--309 2,521,433 9/1950 White 222-309 X 2,521,961 9/ 1950 Bacheller 222-385 X 2,746,642 5/ 1956 Parks 222-309 X 3,120,906 2/1964 Harnage 2212-385 X SAMUEL F. COLEMAN, Primary Examiner.

Claims (1)

1. A HAND OPERATED POSITIVE DISPLACEMENT PUMP FOR DISPENSING A PREDETERMINED QUANTITY OF SYRUP FROM WITHIN A RECEPTACLE HAVING A REMOVABLE LID COMPRISING: (A) A BODY MEMBER MOUNTED UPON THE UNDERSIDE OF SAID LID, SITUATE REMOTELY FROM THE SURFACE OF SAID SYRUP WITHIN SAID RECEPTACLE AND HAVING: (I) A POSITIVE DISPLACEMENT PUMP CHAMBER, (II) AN OUTFLOW COMPARTMENT HAVING FLUID COMMUNICATION WITH THE BOTTOM PORTION OF SAID CHAMBER; (B) A SOLID, DISC-SHAPED PISTON SLIDEABLE WITHIN SAID PUMP CHAMBER AND HAVING SEALING MEANS DISPOSED INTERMEDIATE THE PERIPHERY OF SAID PISTON AND THE WALLS OF SAID CHAMBER SO AS TO ESTABLISH AN ENHANCED PUMP SUCTION WITHIN THE CHAMBER; (C) A HAND ACTUATED RECIPROCATING ASSEMBLY REMOVABLY MOUNTABLE AT THE UPPER SURFACE OF SAID LID SO AS TO COMMUNICATE WITH SAID PUMP CHAMBER AND COMPRISING: (I) A SUPPORTING COLLAR MEMBER REMOVABLY MOUNTABLE UPON THE UPPER SURFACE OF SAID LID AND HAVING A SLEEVE ADAPTED TO RECEIVE AND VERTICALLY ALIGN A COMPRESSIBLE SPRING MEANS, (II) A CONNECTOR ROD SLIDEABLY SUPPORTED BY SAID COLLAR MEMBER AND EXTENSIBLE THERETHROUGH SO AS TO PROTRUDE INTO SAID CHAMBER AND CONNECT IN FORCE TRANSFERRING RELATIONSHIP WITH SAID PISTON, (III) A SLEEVED PUMP PLUNGER CAP CONNECTABLE IN FORCE TRANSFERRING RELATIONSHIP WITH THE UPWARD END OF SAID CONNECTOR ROD, SAID CAP BEING SLIDEABLY EXTENSIBLE ABOUT SAID COLLAR SLEEVE, ADAPTED TO BE URGED OUTWARDLY BY SAID SPRING MEANS AND HAVING ITS OUTWARD TRAVEL RESTRICTED BY THE TRAVEL OF SAID CONNECTOR ROD; (D) SYRUP INTAKE CONDUIT MEANS IN FLUID TRANSFER COMMUNICATION WITH THE BOTTOM OF SAID CHAMBER AND EXTENDING INTO AND HAVING A TERMINUS BELOW THE SYRUP LEVEL OF SAID RECEPTACLE; (E) AN INLET BALL CHECK VALVE REMOVABLY MOUNTED UPON SAID TERMINUS OF SAID INTAKE CONDUIT MEANS AND ADAPTED TO PERMIT ONLY FLUID INFLOW; (F) TUBULAR SYRUP DISPENSING CONDUIT MEANS FIXED TO AND EXTENDING THROUGH THE OUTWARD SURFACE OF SAID LID, TERMINATING IN A DISPENSING PORT AND ADAPTED FOR REMOVABLE CONNECTION IN FLUID TRANSFER RELATIONSHIP WITH SAID BODY MEMBER OUTFLOW COMPARTMENT; (G) AN OUTFLOW CHECK VALVE DISPOSED WITHIN SAID OUTFLOW COMPARTMENT AND ADAPTED TO PERMIT ONLY FLUID OUTFLOW THROUGH SAID PORT.

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