US1913592A - Sirup pump - Google Patents

Description

June 13, 1933. A. E. HEFFNER SIRUP PUMP Filed May 12, 1950 R 7 a M a a a? a W v a 2 4 m H (w m W W w 3 WM 4/! A 2 a w a 4 r Patented June 13, 1933 UNITED STATES PATENT OFFICE ALFRED n. niirrivna,

srnor Application filed ma 12,

i This invention relates to sirup pumps, and the like, and it has reference in particular to improvements in pumps of that characr ter disclosed by United States Patent No. 1,501,473 to Tincher, and the device of my, pending application, Serial Number 257,717, wherein devices are provided for closing the delivery spouts at all times except during the actualdelivery of liquid, so as to insure sanitation and prevent flies, or insects from entering the pump spout. The device of my pending application, above referred to, comprises a yieldingly mounted closure member for the spout that is opened by bringing the edge of a las'sinto contact with an opening element o the closure. This device, While satisfactory for effectiveness, has proven to be not entirely satisfactory for the reason that unless it is opened to its full extent the liquid when dis charged is very apt to be deflected thereby over the glass. In other Words, the device is not. automatic, or fool proof. The device disclosed by the above mentioned patent is automatic, in so far as its operation in connection with the pump plunger is concerned, butit is not satisfactory mechanically and, since it does not start to open until after the pressure has been applied by the pump piston against the liquid inthecylinder, the liquid starts to flow before the spout is fully 1 uncovered and this also results in the liquid being deflected over the glass. p

In view of the objectional featuresof the devices above mentioned, it has been the principal object of this invention to provide a sirup pump in which the mouth of the pump spout is normally covered by a cap or closure member which is automatically moved to open position incident to action of the pump, and which closes automaticallywhen the pump piston recedes. Also,.to provide means whereby the closeure memberis caused 45 to fully open by movement of the pump 0F SEATTLE, WASHINGTON, AS SIGNOR 0F ONE-HALF 'IO CARROLL C. CORNELIUS, 0F SEATTLE; WASHINGTON PUMP 1930. .Seiial No. 451,544.

plunger before movement is given to the pump piston to discharge the liquid.

A still further object resides in the pro vision of means for permitting return flow of a predetermined amount ofliquid from the pump spout after each pumping action so as to preclude drippage at the mouth of the spout, and a consequent clogging of the opening due to drying of material thereon.

Specifically stated, it has been the object of this invention to provide a sirup pump in which the mouthof the pump spout is closed by a cover member or cap which is actuated to open position incident to initial depression of the pump plunger and pump piston so as to permit of a predetermined movement of the plunger before the piston is moved to deliver liquid into the spout.

Other objects reside i the details of construction, and in combination of parts, as 65 will hereinafter be described.

In accomplishing these and other objects of the invention, 1 have provided the improved details of construction, the preferred formsof which are illustrated in the accompanying drawing, wherein-- Fig. 1 is a vertical section, ofa sirup pump with improved-features of construction made according to the details of the present in- I i ventlon. a

Fig. 2 is a sectional view, taken substantially on the line 2--2 in Fig. 1. i

Fig. 3 is a horizontal section on line 8-3 in Fig. 1. 7

Referring more in detail to the several 0 views of the drawing- The pump structure hereinillustrated comprises the usual supporting cover plate 1 upon which the pump equipment is mounted, and which also serves as a closure for the container, or jar, 2 such as is customarily used at soda fountains for containing a supply of sirup. This cover plate may be held properly in position on the jar in any suitable manner.

Disposed within the lower part of the jar is the pump cylinder 3. This is functionally supported from the cover plate 1 by the tubular posts 4 and 5 which, at their lower ends are provided with flanged fittings 6 and 7, respectively, connected by screws 8 to lateral flanges 9 of the pump cylinder, and at their upper ends are connected by nipples 10, or other suitable means, to threaded shanks 11 and 12 extended from the bottom face of the supporting base portion 13 of the pump delivery spout 14 which is mounted on the plate 1 and which is held secure thereon by means of lock nuts 15 and 16 that are threaded onto the shanks 11 and 12 and tightened against the bottom of the plate 1.

The discharge spout 14 has a delivery channel 18 therein and the mouth of the channel opens downwardly from a flat under surface 14a at the end of the spout. At its other end the channel communicates through the shank 11 with the tubular post 4. This post, in turn, opens at its lower end through an enlarged valve chamber 19 in the fitting 6 into a channel 20 that opens into the side of the pump cylinder 3 near the base thereof.

A back check ball valve 22 is contained in the chamber 19 to seat by gravity against the upper end of channel 20 to check return flow of liquid delivered through tube 4 and up ward travel of the ball is stopped by a spider 23 in the chamber so that the ball cannot stop flow or discharge of sirup by closing upwardly against the lower end of the tubular passage of post 4. g

The pumpcylinder 3 is provided centrally in its bottom wall with an opening 25. through which the sirup may flow from container 2 into the cylinder 3 and over which a back check valve plate 26 is mounted by retaining 3 studs 27 with retaining flanges 27a at their upper ends. This for inflow of liquid.

Fitted within the pump cylinder is a piston plate automatically lifts I 30. This is fixed to the lower end of a short push rod or piston rod 31 of tubular form and within which at its upper end a plunger rod 32 is mounted. The lower end of plunger 32 has a los't motion. connection with piston rod 31 provided through the medium of a cross pin 33 in the plunger operable in longitudinal slots 35 in rod 31. This connection permits of a certain limited downward travel of the plunger before the pin takes effect to actuate the piston downwardly.

At its upper end, the plunger 32 has a guide bushing or sleeve 38 fixed thereon and this is slidable through vertically alined openings 39 and 40in the plate 1 and mounting base 13 of the pump spout. A tubular housing 41 is mounted in a socket in the base 13 coaxially about the upper end of the rod 31, and a knob 42 and sleeve 43 are adjustably threaded on the rod end with a coiled spring 44 encircling the rod and bearing upwardly against the sleeve and downwardly against is limited by contacting of the lower end of sleeve 45 with the base.

With this construction, downward actuation of rod 32 by an application of pressure downwardly on knob 42 will effect movement of piston 30 to force liquid from cylinder 3 out through passage 20, chamber 19, tube 4 and spou't channel 18. WVhen pressure is removed from the knob, the spring 44 automatically returns the parts to initial position and the cylinder refills'through the valve passage 25 in its base. A definitely limited downward movement may be obtained by adjusitment of the knob and sleeve on the rod en The mouth of the channel 18 in the discharge spout 14 is normally closed, or coveredby a cap 50. This cap is fixed to the end of a rod 51 which is rotatably contained in a bore 52 along the. spout 14 substantially parallel with the channel 18 and opening through the plate 1. This rod is disposed in such angular relation to the rod 32 that it crosses it just below the lower end of the bushing or enlargement 38, as shown in Figure 1. The lower end of the rod 51 is turned laterally, as at 53, and a coiled spring 54 is attached to the lateral portion and to a bracket 55 mounted between the plate 1 and nut 16, to yieldingly hold the cap 50 tightly closed over the mouth of the spout.

V The cap is adapted on rotation of the shaft to swing downwardly and outwardly to uncover the spout, as shown in dotted lines in Figure :2. To automatically effect this rotation of the shaft incident to actuation of the pump, I have attached a cam 58 to the rod 51 just below the lower end of bushing 38. This cam has a lateral extension 58a engaging the lower end of the bushing in such manner that when the pump rod 32 is pushed downwardly, the rod 51 by reason of the engagement of thebushing and cam is caused to rotate.

It is to be observed also, and this is an important feature of the invention, that the mouth of the spout is fully uncovered by the initial movement of the pump rod and it is not until after the spout has been fully uncovered that the movement of the piston provided through the pin and slot connection 33 and 35 takes place to deliver syrup from the spout. In this way, the objectionable features of discharging sirup before the spout was fully uncovered, is overcome.

The ball check 22 in chamber 19 before seating on retraction of the pump piston permits of a return flow of a certain amount of sirup in the spout incident to retraction or upward travel of the pump piston, and this prevents drippage at the spout end.

The coiled spring 54 operates to return the cap 50 to closed position when the pump rod is raised to its upper limit and retains it tightly closed until the pump is again used.

It is readily apparent that various details of construction could be changed without departing from the spirit of the invention and for this reason it is not desired that the claims belilnited only to the details herein shown, but that they be interpreted commensurate with the scope of the invention.

Having thus described my invention what I claim as new therein and desire to secure by Letters Patent, is: v

1. In a pump of the character described, a delivery spout, a closure, member normally covering the mouth of the spout, yieldable means normally retaining the closure member in closed position, an opening means for the closure member, a pump cylinder, a piston operable therein to deliver liquid from the spout, a plunger, means fixed thereon that is engageable upon initial movement of the plunger to actuate the closure member to open position, other means on the plunger ineffective durin initial movement thereof but operable by arther movement to actuate the piston to deliver liquid from the cylinder through the spout, and yieldable means for returning the plunger and piston to initial position.

means forthe closure member, a stationary pump cylinder, a piston operable therein to deliver liquid from the spout, a plunger means operable by an initial movement of the plunger to actuate the closure member openlng means, and a lost motion connection between the plunger and the piston which becomes effective after the spout has been opened to actuate the piston to delivery liquid from the cylinder through the spout.

Signed at Seattle, Washington this 5th day of May 1930.

ALFRED E. HEFFNER.

2. In a pump of the character described,

a pump cylinder, a delivery spout connected with the cylinder, a piston operable in the cylinder to effect delivery of liquid from the spout, a closure member for the mouth of the spout, yieldable means normally retaining the member in closed position, a piston rod, a plunger having a lost motion connection with the piston rod and means on the plunger for actuating the closure member to open position or initial movement of the plunger and prior to actuation of the piston by reason of the lost motion connection.

3. In a pump of the character described, a pump cylinder, a delivery spout having connection with the cylinder, a piston operable in the cylinder to deliver liquid therefrom through the spout, a revolubly mounted shaft, a closure member for the mouth of the spout fixed to the said shaft, yieldable means normally retaining the closure member in closed position, a piston rod, a plunger rod having a lost motion connection with the pistonrod, a cam on said rotatable shaft, means on the plunger for engaging the cam on initial movement of the plunger to rotate the shaft to move the closure member to open position and prior to actuation of the piston by reason of the lost motion connection, and yieldable means for returning the parts to initial position. 7

4. In a pump of the character described, a delivery spout, a closure member normally covering the mouth of the spout, an opening

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