US2559659A - Pump valve - Google Patents

Description

July 10, 1951 l w. J. REDMAN PUMP VALVE /f FIEL- Patented July 10, 1951 PUMP VALVE.

William J. Redman, Pittsburgh, Pa., assigner to Oil Well Supply Company, a ycorporation of New Jersey Application March 7, 1949', Serial No. 79,972

(Cl. 10S-153) 3 Claims.. l

Thisl invention relates to valves for pumps of the reciprocating type and particularly to improved bumper means for the intake valve.

The present invention is applicable to reciprocating pumps in which the reciprocating element and the intake val-ve parts are assembled and4 disu mantled through the end of the cylinder on removal of the cylinder head. The main advantages of such pumps are that pressure resistant seals are needed only for the cylinder head and the discharge valve cap, and yet both the plunger and the intake valve parts arev readily assembled or dismantled, and that the parts of both the discharge valve and the intake valve can be identical.

An object of the present invention is to provide improved bumper means for intake valves which preserves the advantages of pumps of the foregoing type and yet conserves longitudinal space, which is at a premium, particularly in portable pumpsy high pressure pumps and pumps handling Volatile liquids.

A further object of the invention is to provide improved bumperv means for intake valves which comprises a bumper plate supported by the cylinder wall out of the path of the reciprocating element so that the stroke of this element can eX- Figure 1 is a vertical sectional view of a pump cylinder equipped with an intake valve embodying features of the present invention;

Figure 2 is a top plan view of the bumper plate illustrating its relation to the valve compartment and the cylinder head; and

Figures 3 and 4 are enlarged vertical and horizontal sectional views further illustrating the details of this relation.

In the drawing there is shown a pump which comprises a cylinder I0, a reciprocable element I2, an intake valve I3, a discharge valve Ill and a cylinder head I5. In this example the reciprocable element is a plunger and the pump has suitable power mechanism, not shown, for reciprocating this plunger and thereby drawing iiuid into the cylinder via the intake valve and forcing it out via the discharge valve. The positions of the plunger at the ends of its stroke are shown in full lines and dot-dash lines in Figure 1. The Valve compartments are integral with the cylinder wall and preferably diametrically opposite each other. The discharge valve may be of any conventional construction. v v

The cylinder head is removable from the cylinder and the plunger and the intake valve parts are assembled or dismantled through this end' of the cylinder. The seats, disks and springs of both the intake valve and the discharge valve can beidentical and the pressure resistant seals are needed only at the joints between the cylinder and the cylinder head and between the discharge valve compartment and its cap.

In accordance with the present invention, the inner wall of the intake valve compartment has a circumferential groove I5l adjacent its junc ture with the cylinder walls. This wall has a section cut away, as indicated at II, to' permit the valve bumper to be inserted into the groovey as hereinafter explained. The cut-awayV section extends from the groove to the interior of the cylinder and preferably is situated adjacent the end of the'cylinder.

A valve bumper I8 is carried within groove I6. This valve bumper is a metal plate of substantially the same thickness as groove IB and of substantially the same width as cut-away section Il, allowing for necessary working tolerances. In outline the plate has straight sides and rounded ends of the same curvature as the edges of groove I6, within which it fits. The underface of the plate has an integral boss I9 that anchors the intake valve spring 2B, as well as functioning as a stop that limits inward movement of the intake valve disk 2l The other face of the plate carries an ear 22 which is welded to the plate at one corner. This ear ts between the cylinder head and the edge of the cut-away section and thus prevents the plates rotating after the parts are assembled. The inner face of the cylinder head has a notch I5a for receiving the ear, as best shown in Figures 3 and 4.

In assembling a pump having an intake valve constructed according to the present invention, the plunger and the intake valve parts are inserted through the end of the cylinder. Plate I8 is aligned with cut-away section Il and its far end inserted in groove I6, as indicated in dotdash lines in Figure 2. The plate is then rotated clockwise until ear 22 abuts the edge of the cutaway section. Cylinder head I5 is then sealed over the end of the cylinder and abuts ear 22, which nts within notch IEa.

From the foregoing description it is seen that the intake valve bumper of the present invention is entirely out of the path of the reciprocable element. Therefore, the stroke can extend substantiall to the face of the cylinder head, with a corresponding saving in the longitudinal dimension of the cylinder. There is a further advantage When this arrangement is used in pumps that handle volatile liquids, since the reduction in cylinder volume decreases the likelihood of the plungers merely working back and forth against a gaseous head without developing suicient pressure to open the discharge valve. The structure is simple and rugged and easily assembled or dismantled.

While I have illustrated only a single embodiment of the invention, it is apparent modications may arise. For example valves of the present invention can be used in similar fashion on other types of reciprocating pumps, such as piston pumps. Therefore, I do not wish to be limited by the disclosure set forth, but only by the scope of the appended claims.

I claim:

1. In a reciprocating pump comprising a cylinder, a reciprocable element in said cylinder, intake and discharge valves on the Walls of said cylinder, and a removable cylinder head closing the end of said cylinder, said reciprocable element `and the parts of said intake valve being assembled and dismantled through the end of the cylinder on removal of said cylinder head, the inner wall of the intake valve compartment having a circumferential groove adjacent its juncture with the cylinder and the cut-away section extending from said groove into the cylinder, an intake valve bumper plate carried within said groove out of the part of said reciprocable element, said plate being insertable and removable through the end of said cylinder and insertable into said groove through said cut-away section. 2. In a reciprocating pump comprising a cylinder, a reciprocable element in said cylinder, intake and discharge valves having their compartments integral with the walls of said cylinder, and a removable cylinder head closing the end of said cylinder, said reciprocable element and the parts of said intake valve being assembled and dismantled through the end of the cylinder on removal of said cylinder head, the inner wall of the intake valve compartment having a circumferential groove adjacent its juncture with the cylinder and a cut-away section extending from said groove into the cylinder adjacent the end of the cylinder, an intake valve bumper plate carried Within said groove out of the path of said reciprocable element, and means on said plate abutting the edge of said cut-away section and said cylinder head preventing rotation of said plate.

3. In a reciprocating pump comprising a cylinder, a reciprocable element in said cylinder, intake and discharge valves having their compartments integral with the walls of said cylinder and housing the valve seats, disks and springs, and a removable cylinder head closing the end of said cylinder, said reciprocable element and the parts of said intake valve being assembled and dismantled through the end of the cylinder on removal of said cylinder head, the inner wall of the intake valve compartment having a circumferential groove adjacent its juncture with the cylinder and a cut-away section extending from said groove into the cylinder adjacent the end of the cylinder, an intake valve bumper plate carried within said groove out of the path of said reciprocable element, an integral boss on said plate to which the intake valve spring is attached, and an ear on said plate abutting the edge of said cut-away section and said cylinder head preventing rotation of said plate.

WM. J. REDMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,146,709 Bird et al Feb. 14, 1939 2,272,862 Yohpe Feb. 10, 1942

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