US1918903A - Sirup pump - Google Patents

Description

July 18, 33- J. D. FLETCHER S I RUP PUMP Filed Oct. 24, 1930 m r M M d I F D n M Patented .lnly 1S, 1933 PATENT GFFEQE JOHN D. FLETCHER, OF LOUISVILLE, KENTUCKY SIRUP PUMP Application filed October 24, 1930.

This invention relates to sirup pumps.

An object of the invention is to provide an improved pump with particular attention to means for cci'itrolling the length of the stroke of the pump and an improved outlet conduit and one in which the quantity of sirup pumped out each stroke may be kept constant.

Further objects and advantages will be come apparent as the description proceeds.

Referring to the accompanying drawing. which is made a part hereof and on which similar reference characters indicate similar parts,

Figure l is a view in elevation with certain par shown in section,

Figure 2, a section on line 2-2 of Figure pump cylinder to wl th is secured a support 11 l a post 12, the latter forming the outlet A pipe 13 oort from the pump chamber.

a arged enl 14 which latter is screwed into the member 12. The enlarged me 14 together with the upper enlarged end i the member 12 provide a valve chamber 5 he a ball valve 15 held therein which 1 adapted to rest pen a valve seat. The l valve 16 is preferably of some non-con i'naterial such as lwlonel metal. The r and of post is provided with a ge 17 which is adapted to engage against no lower end of the spout 18, being held against the. spout o crew threaded cap 19 which has a flange engaging the lower shoul dcr of the flanr; '4". The spout has the usual upon the cover 21. The pc 13 serve as supports for ther has supports for the Fl I the top of a s1! 7 ar. 'l he spout 18 18 prowith an o t opening 22. This open- -ositior at such an angle as will c p nterruptcd passage therethrough so that there is no splashing, dripping, cisquir ng of the sirup as it leaves the nozzle. In 0 to assist in this result the outlet opening lies at a slight angle as shown at 23, as distniguished from the usual sharp Serial No. 490,980.

angle normally, at right angles to the passage 24 in the spout. Secured to or made'integral with the cover 21 is a cylindrical m'em her 25, the lower end of which is provided with a flange 26 to receive a shoulder 27 on the piston rod 28. The piston rod 28 has an operating piston 29 on its lower end which moves in the pump cylinder 10. One side of the piston is cut out at 30 to engage around the circular portion of the post 12, the post 12 being provided with an outlet port at 31. The small end 32 of the piston rod extends up within the member 25 and is hollow to receive a threaded stem 33. A compression 1. spring 34.- surrounds the end 32, the lower end of the spring seating upon the flange 26 and the upper end being confined against the inner flange of a tube 3-5 which slides within the member 25. The purpose of the spring is p to return the piston during the idle stroke.

A knob 36 is secured upon the stem 33, this knob having a depending pin 37 adapted to engage in any one of a plurality of notches 38 on the inner flange on the sleeve 35. T he purpose of the screw threads on the stem 33 is to adjust the length of the stroke. The limit of the stroke of the pump, of course, is reached when the flange 39 engages the top 40 of the casing 25. In operation the knob 36 is pressed down during pumping stroke to force sirup in the pump chamber out through the port 81 pastthe ball check valve 16 into valve chamber 15 and into the tube 13 from which it travels out through the outlet spout. Upon the suction stroke the ball valve 16 drops on its seat and sirup is drawn in through the inlet valve 41. This latter valve is held in position by prongs 42 on its lower side which are bent out to engage the lower side of the valve opening. The valve 16 prevents any sirup from flowing hack into the pump. Upon the pumping stroke therefore additional sirup is forced up through the spout. By adjusting the screw 33 to any desired vertical position the length of the stroke may be controlled anc consequently the amount of sirup dispensed at each stroke may be accurately controlled.

In pumps as heretoforeconstructed the outlet pipe 13 was a single piece. This made it difiicult to clean and difficult to assemble the valve. In many such constructions a pin was provided for preventing the ball valve from being forced up into the outlet tube. By my construction a valve chamber is provided which is larger than the outlet tube. This prevents the ball valve from being forced up into. the tube. It is; not necessary therefore to provide a pin for retaining the ball in position. As may be clearly seen the pipe 13 may be unscrewed from the enlarged end 12 and may be detached from the cover plate and so easily removed to assemble "or disassemble the pump. The out-letv passage is smooth and contains no obstructions which will prevent free outflowing of thesirup and which will catch lint that is often shed from the saeks containing the sugar from which the sirup ismade and soon cause the outlet passage tobecome clogged and unsanitary.

Ityvill be obvious to those skilled in the art that various changes may be made in my device Without departing from the spirit of the invention and therefore I do not limit myself to What is shown in the drawing and described in the specification, but only as indicated by the appended claim.

Having thus fully described my said invention, What I claim as new and desire to secure bygLetters Patent, is:

A sirup pump having a pumping chamber, a piston operable in said chamber an outlet from said chamber, a spout detachably secured to said outlet, said spout having a bore therethrough, the outer end of said bore being slightly and gradually curved downwardiv so that the ai'igle formed by the axis of said outer end of said bore and the axis of the bore of the spout is less than ninety degrees there by providing an uninterrupted passage for the sirup as it is discharged from the pump, substantially as set forth.

JOHN D. FLETCHER.

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