US1951910A - Sirup pump - Google Patents

Description

March 20, 1934. A. E. HEFFNER El AL SIRUP PUMP Filed Jan. 12, 1931 INVENTOR fiLFmfa HEFF/Vf/l? Cargo 6. CORNELIUS ATTORNEY Patented Mar. 20, 1934 UNITED STATES SIRUP PUMP Alfred E. Heffner and Carroll C. Cornelius, Seattle, Wash.

Application January 12, 1931, Serial No. 508,170

2 Claims.

This invention relates to improvements in liquid pumps, and particularly to sirup pumps of that character extensively used at soda fountains, and from which the sirup is delivered incident to the depression of a plunger which actuates the pump piston; the present invention being in the nature of an improvement upon the pump described and illustrated in the application of Albert D. Hefiner, filed on May 12, 1930, under Serial Number 451,544, now Patent No. 1,913,592, patented June 13, 1933.

In the pump of the application above referred to, there is a closure or cap fitted to the discharge spout of the pump for normally retaining the port closed to prevent insects from collecting in the spout when the pump is not in use, and also to otherwise insure sanitation of the device. This closure is arranged to be mechanically opened by a certain connection with the pump plunger when the plunger is actuated downwardly to discharge the sirup, and then closes automatically under spring action when the plunger is returned upwardly. This device is satisfactory to a certain extent, but is rather expensive by reason of its mechanical features; therefore, it has been the object of this invention to provide an improved construction employing fewer and less expensive parts, one which is neat and attractive in appearance and which has the port closure device enclosed within the delivery spout.

More specifically stated, it is the object of this invention to provide a closure or valve for the discharge orifice of a sirup pump that is so constructed and arranged within the spout that it will be opened by pressure of sirup created in the spout incident to a delivery operation, and

which will close automatically when this pressure is removed.

Other objects of the invention reside in the details of construction, and in the combination of parts and in their mode of operation, as will The present illustration is that of the usual sirup pump used at soda fountains. It comprises the sirup container 1 with top closure or cover 2 to which the pump mechanism -is attached. The pump mechanism includes a cylinder 3 suspended within the container to receive liquid through a valved base opening 4; the liquid being discharged by downward movement of a piston 5 in the cylinder actuated by a push rod or plunger 6.

The sirup discharged from the cylinder under pressure of the piston 5 flows upwardly through a delivery pipe 7 into a spout 8 having a cylindrical bore 9 connected at one end to the pipe '7 and closed at its outer end by a removable plug 10 threaded thereinto. Opening laterally and downwardly from the bore 9 is a delivery, or discharge port 12, and this is normally closed by a sleeve valve 13 rotatably fitted within the bore and provided at one side with a port 15 adapted, by rotative action of the sleeve, to be brought into registration with the port 12 for the delivery of sirup from the spout. A coiled spring 16, attached to the plug and to valve sleeve operates to yieldingly retain the valve element in closed position.

In order to open the valve under the action of liquid delivered through the spout, we utilize a spiral baille 18 which is rotatably contained within the spout channel. At one end it has a supporting pivot 19, and at its opposite end is attached to the inner end of the sleeve; the sleeve in turn has a supporting pivot 20 at its outer end engaging the plug.

The spiral baffle is so arranged that the action of liquid delivered forcibly against it incident to a discharge operation of the plunger, will operate to rotate the baffle and valve sufiiciently to open the delivery port. As long as liquid is being discharged, the valve remains open, but as soon as it stops then the spring operates to close the valve. A screw 24 through the spout wall limits rotative movement to hold the ports 12 and 15 in registration during discharge of the liquid.

In Fig. 3 is an alternative construction in which a valve 25 is slidably contained in the bore 9 to overlie the discharge port. A spring 26 urges it to closed position. Liquid forcibly delivered moves the valve outwardly to permit delivery from the port.

In Fig. 4 a cap 28 slides on the spout and overlies the port. A coiled spring 29 pulls it to closed position, and it is moved outwardly by pressure of liquid against a piston 30 integral with the cap and extended slidably within the bore.

Devices of this character are very desirable, as they automatically close the delivery port to retain the spout free of insects.

It is readily apparent that various details of construction might be altered without departing from the spirit of the invention. Therefore, we do not desire that the claims be limited in scope only to the details of construction shown, but that they be'given an interpretation commensurate with the invention disclosed.

Having thus described our invention, what we claim as new therein, and on which we desire to secure Letters Patent is 1. In a pump of the character described, a cylinder, a delivery spout connected therewith having a discharge port, a piston in the cylinder operable to deliver liquid forcibly through the spout, a closure Valve for the port rotatably contained within the spout, a spring urging it to closed position, and a spiral baffle contained within the spout, an abutment member in the spout against which the baffle engages to effect longitudinal shifting thereof incident to its rotation; said baffle being operatively connected to the valve and adapted to be acted on by the delivery of liquid through the spout to rotate it to move the valve to open position.

2. A device as recited by claim 1 wherein the spout has a cylindrical channel communicating atone end with the cylinder and closed at its outer end with a removable plug, and the delivery port opens laterally from the channel, and wherein the valve and the baffle are connected and are removable together from the spout by removal of the plug.

ALFRED E. HEFFNER. CARROLL C. CORNELIUS.

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