US2313284A

US2313284A - Pump valve

Info

Publication number: US2313284A
Application number: US336349A
Authority: US
Inventors: Warren P Valentine
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-05-21
Filing date: 1940-05-21
Publication date: 1943-03-09
Anticipated expiration: 1960-03-09

Description

March 9, 1943. w. P. VALENTINE PUMP VALVE Filed May 21, 1940 Patented Mar. 9, 1943 UNITED STATES PATENT OFFICE PUMB VALVE Warren P. Valentine, Yeadon, Pa. Application May 21, 1940, Serial No. 336,349

7 Claims.

ring portion at one port from the ring portion v at the other port.

A further purpose is to use a rubber ring as an inlet pump valve element and optionally to clamp the ring between a cylinder head casting and a cylinder block to hold the ring in place.

Further purposes will appear in the specification and in the claims.

I have preferred to illustrate my invention by two slightly variant illustrations, selecting forms which are practical, effective, simple, and inexpensive and which at the same time well illustrate the principles involved.

Figure 1 is a longitudinal section through a pump and driving mechanism therefor, illustratinga desirable form of the invention.

Figure 2 is a left end elevation of the structure seen in Figure 1.

Figure 3 is a left end elevation of the cylinder block of Figure 1 when the head casting has been extended at l5 for threaded connection with the piston rod. If in use where there is liquid in the chamber It a stufling box l1 may be used. I show packing I8 and gland l9. It will be obvious that the detail of this mechanism is given for the purpose only of showing one form of overflow chamber 29 at the opposite end, the' dition.

chambers 28 and 29 being suitably connected by pipes 30 and 3| with surge chambers not shown.

The inlet liquid passes from chamber 21 (23 or 29) during respectively successive strokes of the pump through valve openings (ports) 32 and 33 respectively into arcuate chambers 23 and 35 which communicate through the inlet ducts 20 and 2| to opposite ends of the cylinder 6.

The arcuate inlet chambers 34 and 35 and the arcuate outlet chambers 24 and 25 are arcuate enlargements at opposite sides of the cylinder of registering ring grooves, 36 and 31 in each end of the cylinder block and 38 and 39 in each cylinder head. These ring grooves receive rubber ring-shaped valves, here shown in the preferred form as continuous rubber rings 40 at one end and 4| at the other end.

Except at the arcuate enlargements 34 and 24, or 35 and 25 (according to the end of the cylinder which is being considered), the walls of these grooves clamp the rubber ring 40 or 4|. Between these clamping points the ring seats at one side of the cylinder across the discharge port,22 (or 23) and at the other side of the cylinder the ring seats over the inlet port 3201' 33 within the arcuate chamber 34 or 35.

Each of the rings 40 and 4|, of rubber or other firm resilient material, acts at its end of the cylinder to cover the inlet port at one side of the cylinder and the outlet port at the opposite side of the cylinder, these valve portions of each ring length lying within the arcuate enlargements of the grooves. These ring portions at the inlet and outlet ports are valve elements to open outwardly under excess outward pressure from within the

ports

22, 23, 32, and 33 and resiliently to close the ports when the outward excess pressure ends.

The ring portions are preferably connected parts forming complete rings 40 and 4|, both because of convenience of manufacture but also because of ease of installation in stretched con- They are held in posit on by their clamping fits within the registering ring groove portions intermediate the enlargements 24, 25, 34, and 35 at the two ends.

cylinder, being axially offset to be outside of the Each ring may be applied in slightly stretched condition to insure its closure of the port opening and to apply inlet manifold 21. Both rings open outwardly at inlet port 32 or 33 on one side and open .outwardly at outlet port 22 or-23 on the other side, different unclamped sections ofzeach ring thus comprising inwardly retracted valve elements opening outwardly.

The arcuate enlargements at 24, 25, 34, and 25 of the cooperating grooves, enclosing the rings 40 and M, should be at least as long as and preferably somewhat longer than the '

cuate ports

22, 23, 32, and 33 to be covered. For example, as clearly seen in Figure 3, the ports may be the same length asthe enlargements. The inlet manifold 21, showncircular along most of the length of the cylinder 6 is arcuately enlarged at 42 and respectively at the ring ports 32 and 33.

Drain taps 44 are-shown at both of the chambers 28 and 29.

I illustrate in Figure 4 that I intend to use my resilient ring inlet-and-outlet valve on pump which has the characteristics of a single acting as well as on double acting pumps. However, the ratio of piston rod to piston and the opening at the back make the pump of Figure 4 double acting. The description of the'structure of Figures 1 to 3 applies generally to Figure 4 in so far as Figure 4 applies the present invention, using the same letters of reference primed for the parts of Figure 4 that correspond to the described structure of Figures 1 to 3.

The piston 5 is operated in cylinder 6' by piston rod 1, protected from leakage by a stumng box. Channel 20' provides inlet to the cylinder,

discharge taking place through port 22 into chamber 24'.

The inlet is supplied at 21' with reserve flow through chamber 28' and pipe 30' to a surge chamber not shown.

The liquid passes from manifold 21' through port 32' to arcuate chamber 34'. The ring 4|! valve is clamped between the grooves 36', 31 and the grooves 38' and 39 and the manifold is enlarged at 42'.

The facts that the piston 5' has twice the cross sectional .area as compared with the cross sectional area of the piston rod 1 and that the rear of the cylinder 6' opens into the discharge chamber, makes this pump of Figure 4 double acting. The forward piston movement (to the left in Figure 4) permits half as 'much liquid to .crowd into the space behind the piston as is pumped by thepiston. The excess one-half is driven out of the discharge on this forward stroke and the other half (that back of the pis- V ,ton) is driven out through the discharge on the back stroke.

The operation of the two double acting pumps of the figures will be evident to anyone skilled in the art.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, and I, therefore, claim all such in so far as they fall within the reasonablespirit and scope of my invention.

Having thus described .my invention what-I claim as new and desire to secure by Letters Patent is:

l. A pump including a cylinder block and a cylinder head therefor, both having cooperating circumferential grooves, the groovesbeing-of one smaller size in two circumferentially opposite clamping parts of the groove and relatively enlarged at two opposite but intermediate parts. and having inlet and outlet ports at the enlarged parts, and elastic port closures of diameter larger than that of the smaller grooves clamped at the smaller size clamping parts of the groove between the block and head.

- 2. In a pump, a pump cylinder block having an outlet cylinder port at an end of the cylinder, walls forming an inlet compartment adjacent the end of the cylinder, the compartment having an outwardly directed inlet. port which with a passage connects the compartment with the interior of the cylinder, an elastic ring engaging both ports outside of the ports and means common to the cylinder block and the end of the cylinder for sealing engaging the ring at points clrcumferentially between the points of engagement with the outlet and inlet ports.

3. In a. pump, a pump cylinder block, a piston in the cylinder, means for operating the piston, separate cylinder heads at opposite ends of the cylinder, the cylinder block and the cylinder head having cooperating grooves eccentrically positioned about the cylinder, inlet and outlet ports at each end at opposite sides of the cylinder, facing outwardly from the cylinder, respectively, and a rubber ring normally closing both ports, the ring being gripped by the walls of the grooves between the cylinder block and cylinder head.

4. In a pump, a cylinder block having outwardly directed outlet ports at opposite ends, a piston within the block, walls forming a passage outside the cylinder for inlet liquid, outwardly directed ports from the passage and at opposite ends of the cylindencylinder heads at opposite ends of the cylinder each containing an inlet passage into the cylinder, rubber rings, one at each end adapted to surround the cylinder and each to engage the outer ends of the outwardly directed ports and clamping means for sealing each of said rings against leakage following the rings from outlet to inlet port-engaging parts thereof.

5. In a pump, a pump cylinder block and head having an outwardly directed discharge port, walls forming an inlet passage extending longitudinally of the cylinder, surge connections in the walls of the inlet, the passage walls forming a cylinder inlet port and extending outwardly from the inlet passage, the inlet port being connected with the end of the cylinder, and a resilient outwardly opening ring closure for the outwardly directed ports, the cylinder block and cylinder head being divided at the ports and parts of the ports appearing each in the block and head.

6. In a pump, a cylinder block having a cylinder, a cylinder head, a rubber ring clamped between the head and cylinder block and eccentric to the cylinder and walls forming inlet and outlet ports opening outwardly and located between the cylinder block and head and both closed by the ring.

7. In a-double acting pump, a cylinder block having a cylinder, cylinder heads, one at each end thereof, rubber rings eccentric to the cylinder, one at each end of the cylinder block between the cylinder block and adjacent cylinder head and walls forming inlet and outlet ports both opening outwardly at each end of the cylinder between the cylinder block and adjacent cylinder head and both closed by the adjacent ring.

Y'YWARREN P. VALENTINE.