Plunger with simple retention valve

Details Plunger with simple retention valve Plunger with simple retention valve

1986-05-23

1987-11-24

Croyle, Carlton R.

Pumps

Successive stages

Reciprocating rigid stages

417513, 417514, 417520, 92168, F04B 300, F04B 700

Patent

active

047085975

ABSTRACT:
A fluid pump is disclosed having a plunger reciprocating within a working cylinder and a standing intake retention valve. The plunger comprises a stem having affixed to it a plug and a stop, a body being slidably engaged to the cylinder an located on the discharge side of the plug and on the intake side of the stop. Upon the upstroke of the plunger, a plug surface engages with a body seal and therefore pumps the fluid before it. Meanwhile, fluid flows in behind the plunger through the standing intake retention valve. Optionally, a standing discharge retention valve is employed to alleviate the vapor lock condition caused by the combination of counterpressure effect and gases in the fluid. On the downstroke, the plug disengages from the body, allowing fluid to flow noncompressibly past the plunger. Wiper means keep the cylinder surface clean of precipitated solids, so as to prevent abrasion to the sliding exterior surface of the body.

REFERENCES:
patent: 2326378 (1943-08-01), McConnohie
patent: 3186354 (1965-06-01), Mahoney
patent: 4012173 (1977-03-01), Everson
patent: 4591316 (1986-05-01), Fekete

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