US1902261A - Sirup pump - Google Patents

Description

SIRH? PUMP Filed July 7, 1955i) Patented Mar. 21, 1933 i UNITED STATES 'tenant seras f; Y

ALLEN C. PILGHER .AND LAWRENCE C. PIL-CHER, OF LOUISVILLE, KENTUCKY, AS-

SGNORS, BY DIRECT AND MESNE ASSIGNMENTS,`TO THE RUSS M'ANUFACT'URING l COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO I sInUP PUMP` Application led July 7,

.l Our present invention relates to improvev ments in liquid `dispensing pumps designed to deliver measured or predetermined quantities of liquid. v Y Y y An object of the invention isthe provision of al verysimple and inexpensive pump which will be accurate and reliable in use.

The invention also aims to provide a novel means which will be inoperative to deliver the liquid until the actuating member has been moved for a full stroke, thereby preventing delivery of less than the full measured amount.

The invent-ion further aims to provide a novel form of liquid inlet valve through the piston, in which the valve port is closed by a valve member on the end of the actuating member or piston rod.

Another object of the invention is to provide a liquid dispensing pump in which the piston actuating member consists of a piston rod detachable from the piston. f

The invention also aims to provide effective means whereby the pump may be ad-V justed to deliver a greater or less amount of liquid.

Other objects will appear hereinafter. j The invention consists in the features,

combination and arrangement of parts hereinafter described and particularly pointed out in the claims. Y Referring to the drawing: Figure l is an elevation partlyin vertical section of a pump embodying the features "l of the invention7 with the' sirup container indicated in dotted lines.

Fig. 2 is a vertical sectionof the cylinder showing the actuating member at the extremity of its inward stroke and connected .-if; to the piston.

Fig. 3 is a view of the enlargement or body for the end of the actuating member. s

Fig. 4 is a bottom plan of the end of the piston rod enlargement.

Fig. 5 is a plan view of the lcheck valve. l Fig. 6 -is a sectional view of afform of piston locking means to prevent downward movement when thepiston and rod are connected.' Y

Fig. 7 is a top planl view of Fig. 6.

1930. `serial No. 466336.

In the drawing, l representsfthecontainer, shown conventionally kin dotted lines, for holding the sirup or otherk liquid to be delivered. The pump showing one embodiment, of` the present invention, is insertedin the `container. The pump comprises a cylinder 2 Which'is carried'at' the lower end of vertical columns 3 and 4 which are connected at their,

upper ends to a cover Linember 5 for the container, by which cover member, the various parts of the delivery mechanism are supported The pumplcylinder contains a piston 6.

The piston 6 has no permanently connectedl piston rod but-has a port (5a-for removably receiving the end of an actuating member or piston rod 7 passing throughy an opening in the cylinder head 2b. i

The column 4 is made hollow for delivery purposes and terminates at its-upper end inV inlower. or in- Fig. 1 by a compiston head 2b is a threaded adjusting or regulating e member 10V having an annular flange 11 at its lower end providing anupper bearing for compression spring 9.' `Zlhe lower end of the spring 9 bears in a groove l2 in the piston.

The regulating member l0 is in the form of a cylinder having a bore in which the piston actuating member or pietonrodV 'Z is slidable. Av lock nut 13 is provided at the upper end of theV adjusting member l() `to lock itin adjusted position with-respect to the cylinder head. v

The regulating member maybe adjusted from the outside by means of a pin wrench inserted in hole 10b. i y

The regulating member at its upper end is provided with an... upstanding flange V10a adelivery spout 4a while at its lower endKV forming a reservoir for the sirup or other liquid which prevents air leakage into the cylinder past the piston rod when the liquid level in the container is below the top of the flange 10a. y

The lowerl end of the adjusting member below the flange 11 is provided with an inclined tapered cam or lock releasing portion 14.

The lower end of the actuating member or piston rod 7 is provided with an enlargement 15 in which latches or pawls 16 areA pivotally mounted at 16a. lThe latches 16y are spring-pressed outwardly by means of spring means 17. The enlargement 15 is preferably formed separate from the rod 7 andneis at tached thereto by stud 15b beingfixed in a corresponding bore in the piston'rod.

On the very end of the bodiy'15 of the piston actuating member or rod' 7, is provided a solid valvedisc 18 adapted to fully close the hole or port 6a. f

. The piston at port 6a is provided with a groove 6b providing lower and upper flanges, 6c and 6d. The lower flange 6c is adaptedk to be snugly engaged by the edge of disc 18 and forms an effective valve closure for the port in the piston. With the port thus closed by Y disc 18 engaging flange 6c, thel latches 16 are .engaged beneath the flange 6d. The flange 6d is shorter than flange 6c and provides a larger` opening than that provided by'flangeV 6c.

The rod or actuating member is urged upwardly by spring 21 having a bearing atits lower end on inturned flange 22a at the lower end of tubular member or sleeve 22 mounted in the cover member. `The actuating member or rod 7 has a reduced threaded extension 7 czy at its upper end which engages a correspondingly threaded recess in a handle memv ber 23 designed to receive the pressure of the hand of the operator,.which member 23 hasy a depending sleeve or skirt 23a which-telescopical'ly fits'the guide tube-22 and which also encloses the upper end of the spring 21.

Pressure on the handle member 23 forces it downwardly and the disc valve 18 on the end of thev actuating rod 7 enters and closes the hole at the bottom of the piston 6. The actuating member 7 and the piston are at the same time locked togetherbyineans of the latches 16 located above the disc valve 18, thelatches engaging beneath the flange 6d on the piston, as shown 1n Fig. 2.

This, of course, only takes place when the actuating rod 7 is depressed for a'full stroke,

since the piston is disposed at the. very bottom of the cylinder and rests against the flange provided by split ring24 secured by pins or the like 25, to the cylinder wall.

lVhen downward pressure is removed from the handle member, spring 21 raises Vthe handle member and actuating rod with the piston locked to it, thus accomplishing thedischarge;

During the latter partof the upward strokev of the actua-ting or piston rod 7, the release of the piston is accomplished by the upper ends of the latches 16 riding up the taper 14 of the regulating or adj Listing member 10.

Upon release of the latches from the piston, the actuating member 7 continues upwardly a short distance, carrying the disc valve 18 out of contact withthe piston flange 6c and thus opening Vthe piston valve port 6a. The hole for'pinedf by flange 6d. being larger than that formed by ange'Gc, the free release and separation of the piston and actuating member is accomplished upon disengagement of the latches fro-m flange 6d, since the liquid may Vflow freely through and above the piston and around the actuating member as soon as disc 18 is lifted from sealingcontactwith valve flange 6c. The piston is then free to descend under its own weight and under the influence of the coil spring 9, until thepiston rests upon the flange provided by split ring 24 at the bottom of the cylinder. The releasing position of the piston is shown in i dotted lines in Fig. 1. v

The actuating member continuing upwardly a short distance after the piston is released, prevents a vacuum which would occur by endeavoring to lower the piston until a passage is open through the piston. The actuating member moving upwardly after release of the piston opens the piston port and allows allow of sirup or other liquid to occupytheincreasing space above the piston caused by the downward movement of the piston.

The spring 21 is of sufficient power to move the piston upwardly against the action ofthe spring 9, when `thev actuating member is locked to thev piston. l

Adjustment of vtheregulating member 10 will move the taper 14 down or up to release the piston sooner or later which will make the discharge smaller or larger.

Shoulder 15a on enlargement 15 on piston actuating rod 7 will limit upward movement of the rod 7 and handle member 23 by engagement with the lower end of tapered portion 14. l' v vThe check valve 8 is preferably made from square stoclr as shown in Fig.. 5 and is provided with a small circularseating surface 8a.

Projections. 4d depend Afrom the tubular column 4 to limit upward movement of the check valve when it is lifted to open position.

In Figs. 6 and 7 is shown an arrangement whereby the piston may be locked if it is kattempted' to press it down before it has completed its upward discharge stroke and while itis secured to the piston rod. This device may be readily applied to the pump shown in Fig. 1. It comprises an expanding sectional disc 26 mounted on the top of the pis- .ton by screws 27 the heads 28 ofr'which hold sion spring 9 rests upon thel screw heads in kerfs or slots 29 therein. y

The inner edges ofthe disc segments are inclined as shown at 30 in Fig. 6 to correspond with an incline 3l formed on the actuating member enlargement body 15 adjacent the latch pivots 16a. The latches 16 are not shown in Fig. 6. v i

The sectional disc will expand in case the actuating member is pushed down while it is connected to the piston by the latchesf This is caused by the incline 31 pushing down against the incline 30 which forces the segments of the disc outwardly. The expansion of the segments against the walls of thecylinder locks the piston against downward movement.

The expansible sectional disc piston effectively locks the piston against. downward strokes and prevents interference with the ullamount of discharge on the upward discharge stroke. j

The pump may be made as shown in Fig. l or with the locking devices of Figs. 6 and 7 included. With the locking device included in the pump of Fig. l it will be apparent that, with the piston occupying the position shown in Fig. l, the actuating member will.

latch into connection with the piston just before it reaches the end of ,its'downstroke Further downward movement simply causesl the segmental lock to operate. rlheend of the downstroke of the actuatingmember is determined by the shoulder 32 of the body fen-r largement 15 engaging the top ofthe piston at upper flange 6d. This engagement maynever occur due to the fact that the segments will rst lock against the cylinderwalls. The screw holes 27a in the segments fof the sectional discl 26 are larger'than' the Shanks of the screws and permit movement: of the segments during the locking and une locking movements. e The fact that the coilspring 9-rests upon the screw heads eliminates frictional contact between the coil spring and the V:expanding segments. Y The square construction ofthe check valve body 8 simplifies and facilitates manufacture! ing. The square valve body has a free working t in the circular or round cylinder 8b. The corners of the square movable body'S are slightly rounded and serve as guides for? The segmental the body in the cylinder.l e Y spaces between the round cylinder and square valve body serve as passageways permittingV the uplow of Sirup, thus eliminating the making of slots in the valve body for thisA purpose. 1 Y We claim: l n l. In a liquid dispensing pump, a piston having a port, an actuating member having means to operatively connect with said piston' for unitary movement therewith, means moving with'the actuating member for closing leasing saidconnection during the outward movement of said actuating member to open said port and to separate said actuating member andpiston, said means including a tapered member depending from the cylinder head to beenga-ged by Vsaid latches.

3. A liquid dispensing pump according to claimQinWhich said tapered member is .carried by. a discharge regulating member ladjustably mountedl in the cylinder head to movJ 'said taperedV member inward'or outwar 4.@ In a liquid dispensing pump, a cylinder,

apiston having a port, a piston actuating member movable inwardly through said cylinder into connection with said piston for unitary outward movement therewith and closing said port, an enlargement on the inner end of said piston actuating member, said piston receiving said enlargement toV close said port, a'locking flange on the piston at said `port,'latc'hes pivotally mounted on said A enlargement and spring-pressed outwardly to engage beneath'said flange, and means releasing said latches during the outward movement offsaid actuating member for opening saidport and to separate said actuating member and piston, said means including a tapered member depending rom'the cylinder head ,to be contacted by said latches.

5'. .A liquid dispensing Npump according tol claim L inv which said tapered member Iis calried by a discharge regulating member adjust-ably mounted inthe cylinder head to move said tapered member inward or outwardgsaid regulating member having anupstanding flange at its upper end providing a liquid .reservoir to seal the passage of the piston through the cylinder head against sucking in air when the level'of the liquid is below the reservoir.

- 6. Aliquid dispensing pump according to claim 4 in which said enlargement is provided with a terminal valve disc, and slots above said disc to'receive said latches, said latches each'having a hooked head below its pivot and an arm extending aboveits pivot, said piston'at'said port being. providedwith a groove beneath said locking 'flange to receive the' heads of the latches, the port below said groove being adapted to .be closed by said valve disc,the latch arms being adapted to ride uponsaid tapered member.

k7. A liquiddispensing pump according to claim 4 in which said tapered member is carried lby a discharge regulating member adj ustablyl mounted in the cylinder head to move said taper-edmember inward or outward, said regulating member having a spring bearing iange adjacent said tapered member, a groove in the upper face of the piston, a spring bearing at its upper end against said spring bearing flange and at its lower end against the bottom of Ysaid groove to urge the piston inwardly, and a flange in said cylinder forming a rest for the piston limiting its inward movement, said enlargementI providing a shoulder adapted to engage the lowerend of the tapered member to limit upward movement of the actuatingmember.

'8. A liquid dispensing pump according to claim `2 in which said piston actuating member connects with the piston and closes the port in the piston before the actuating member has reached the end of its inward stroke.

9. A liquid dispensing pump according to claimV 2 in which said piston at said port is provided with an upper locking flange for cooperating with said latches and a lower valve flange for cooperating with the valve disc on therend of the actuating member toy seal the port, said upper ilange being shorter than the lower iange and providing a larger openingl whereby upon disengagement of the latches the free release and se-paration of the y piston from the actuating member is effected by the free passage or the liquid through and above the piston and around the actuating member.A f

- 10.` A liquid dispensing pump according to claim 2 including radially movable locking meansv on said piston and means on saidl actuating member to move said locking means into engagement with the cylinder walls upon downward movement of said actuating member while connected to said piston.

..11. In a liquid dispensing pump, a cylinder having an inlet at one end and an outlet at the other end, axpiston normally biased toy occupy a piston at the inlet end of said cylinder, said piston having a port, an actuvGil ating membery Jfor the piston reciprocable Y within thecylinder with means for giving it reciprocating movement, said actuating means including latch means for engaging theA piston and moving it towards theV outlet epd of the cylinder, said actuating member having thereon a closure for the opening in the piston, radially movable locking means on said piston, said locking means comprising a segmental ring movably secured on the top 'of' said piston, the inner edges of said segments being inclined, said actuating member having aninclined portion to engage the incline onv the segments and to move them into engagement with the cylinder walls upon movement of thev actuating member contrary recaen to the direction of ,said unitary movement while connected to said piston.

12.. A liquid dispensingpump according'v to claim 2 including radial-ly movable lock- Y ing segments mounted upon thestop of said piston, said segments `being inclined at their inner edges, said actuating member having an inclined portion to engage the inclined edges of the segments to move the segments against the cylinder wall upon movement of the actuating member contrary to the direction of said unitary movement while connected to said piston, said latches connecting said piston ,and actuating member and said port beingv closed by said actuating member prior to the end of the initial connecting stroke of the actuating member.

13. A liquid dispensingpump according to claim 1 in `which said tapered member is carried by a discharge regulating memberadjustably mounted -in the cylinder head :to move said tapered member inward or outward, said regulating member having a hole for receiving a pin wrench for adjustmentfrom the outside; l 14. In combination, a cylinder, a pistonV having a port for the passage of iiuid from c returnV stroke, the said piston then moving back to its initial position with its port open, substantially as described.

.15. In combination, a cylinder, a piston therein having a port, a member to be recipro-l cated within the cylinder, means for effecting said reciprocation, said member having means for closing the port on one stroke of said member, said member also having means to connect with said piston'to .move it on the return stroke and with .its port closed, for the discharge of the Huid from the cylinder, and means to4 release the piston from the connecting means during the return stroke to allow the piston to resume itsinitial position.

V16. Apparatusl according to claim 15, a spring urging said piston when released from the said connection to its initial position and a spring for urging in the opposite direction the said member which carries the connecting means, the last mentioned spring being or suicient strength to movethe piston from its initial position with its port closed for discharging the fluid from said cylinder.

17. In combination in a dispensing pump, a cylinder, a piston having a portv therethrough, a reciprocable member having means for closing the port vand having also member, means for operating the said disengaging means for the release of the piston-on one stroke of the recprocable member for the return of said piston to initial position and means for locking the piston against movement towards its initial position While connected to said reciprooable means, substantially as described. f

In testimony whereof, We aifx our signatures.

ALLEN C. PILCH-IER. LAWRENCE C. PILCHER.

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