US1590805A - Self-measuring barrel pump - Google Patents

Description

June 29` 1926.

G. U. BRAKE SELF MEASURING BARREL PUMP 2 Sheets-Sheet 1 Filed July 1'7. 1922 .June 2'9 ,1926. 1,590,805

vG. U. BRAKE SELF MEASURING BARREL PUMP Filed July 1'7, 1922 2 Sheets-Sheet 2 Patented June 29, 1926.

UNITED STATES l y 1,590,805 PATENT OFFICE.

GEORGE U. BRAKE, OF FGRT WAYNE, INDIANA, ASSIGNOR- TOV TOK-IEIM OIL TANK AND PUMP `001V!EF1-HQE', A CORPORATIQN 0F INDIANA.

snLr-Mnasunne BARREL PUMP.

Application filed J'uly` 17, 1922. Serial No. 575,555.

This invention relates to improvements in self measuring barrel pumps adapted for Idispensing oil, especially thicklubricating oil. The object of the inventionv is to `provide in a pump of its class a valve :tor its piston head which will be positively opened and closed as the pistonhead is actuated 1n correspondingly opposite directions.

Ordinarily, where a valvular piston is employed in a pump, the valve is seated and unseated during the operation of the piston by the pressure of the transient liquid contained in the pump cylinder beneath or above the piston according to the direction of movement of the piston, the action of the valve being ydependent upon movement of the piston head. The present invention contemplates the positive opening and closing of the valve in the piston head by the actuating mechanism for operating the piston head, and thus insure a more accurate measurement of the liquid dispensed by the pump.

The object of the invention is accomplished by the construction illustrated in the accompanying drawings, in which Fig. 1 is a front elevation of a pump embodymg the invention, a portion of the view being broken away;

Fig. 2 is a top plan view of thc plston valve;

Fig. 3 is a side view of Fig. 2;

Fig. 4 is a top plan view of the sustaining disc-of the piston head;

Fig. 5 is a central section of Fig. 4; and

Fig. 6 is a fragmentary sectional view of the pump cylinder showing the valvularl piston head.

The characters appearing in the description refer to parts shown in the drawings and designed thereon by corresponding characters.

The invention comprises a pump cylinder 1 arranged between a base 2 and head 3, the latter having a discharge spout 4:, and the base having a chamber 2 and an inlet valve 5. The head 3 has a tubular eXtension 6 at its top, the extension being closed at its upper end by a cap 7. A screw stop 8 extends centrally through the top of the cap into the tubular extension for the purpose hereinafter described. p

i Within the cylinder is a rackbar 9 that extends through the head 3 into the extension 6 and has actuated relation with a cranking means which includes a pinion 10 and crank '11, the pinion being contained within the head and connected with the crank. rilhe lower end of the rack-'bar has a stud 12 that extends vloosely in a sustaining disc 13 which together with a leather cup 1li and retaining ring 15 `form the piston head. An annular expanding member 16 is held by the retaining ring in position against the inner wall of the cup in the usual manner to hold the cup into intimate contact with the adjacent inner wall of the pump cylinder. The sustaining disc has a concentric series` of openings 17 encompassed on its bottom by an annular valve seat 18, and a valve 19 fixed on the lower end of the stud 12 bears upon the seat when the racksbar is raised. The disc 13 has also a central hub 20 through which the stud 12 loosely extends and against the upper end of which the rackbar bears when the valve 19 is moved to open position. The lower end of the rack-bar and the valve on the stud are spaced apart suficiently to admit of limited longitudinal movement kof the stud in the piston head so that opening and closing of the valve is directly effected by movement of the rack,- bar and the movement of the piston head is secondary to that of the valve.

In the operation of the invention the base is screwed into the bung opening of a barrel or otherwise mounted in operating position. Also, a suction pipe (not shown), commonly employed, is connected with the lower end of the base, through which liquid may be drawn into the pump. By manipulating the crank in the usual manner the rack-bar is. reciprocated. As the rack-bar is raised, the valve 19 bears against the seat 18, thus the openings 17in the piston head are closed and the piston head is raised by the upward movement of the rack-bar through the medium of the valve 19. As the piston head is thus raised the liquid is drawn past the valve-5in the base into the cylinder, the amount depending upon the extent of upward movement of the rack-bar which is limited by coming into contact with the screw stop 8. When the rack-bar is moved downward, the stud slides in the piston head until the valve 19 is `open and the rack-bar bears against the hub and thus directly moves the piston head downwardly while the valve 19 is held out of contact with its seat, thus admitting` the passage of the liquid previously drawn into the lower end ci the cylinder to pass through the openings vin the piston head into the upper end of the cylinder, from which it becomes discharged ward stroke of the piston head.

The downward stroke of the piston head is limited by its sustaining disc which comes into Contact with the base-2 upon reaching the lower end of the cylinder and the valve enters the chamber in the base displacing more or less of the liquid contentsth-ereoi". By adjusting thestop-screw 8 the stroke of the pump and thequantity of liquid dis'- charged by the pump upon each stroke thereof may be regula/ted accordingly. v

. The chamber 2 kin the base is of a size Vthroughthe spout el upon the subsequent'up- Y' that admits of ready movement `of: the `liquid therein around and about the valve 19',

which, especial-ly when .the liqui-dris an eX- ceedingly heavy oil, facilitates operation of the pump. Y f

that I claim is A measuring pump including a cylindrr cal body having a discharge outlet at its top, akbase having a chamber therein with a valve controlled inlet; a reciprocating piston having a valve opening and limited downward movement in the cylinder; and a driving member for the piston including `a valve operable to close the valveopening therein and 4actuate the piston in its upward stroke, said valve being movable-'into said chamber at the end portion of the downward stroke of saiddriving member.. In testimony whereof aiX my signature.

GEORGE U. BRAKE..

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