Piston with simple retention valve

Details Piston with simple retention valve Piston with simple retention valve

1982-09-29

1986-05-27

Freeh, William L.

Pumps

Successive stages

Reciprocating rigid stages

417513, 417514, 417520, F04B 300, F04B 700

Patent

active

045913161

ABSTRACT:
A positive displacement pump particularly useful in pumping viscous fluids which may or may not contain gases, including water vapor, and/or suspended solids in which the actual flow equals the theoretical maximum flow through a check valve associated with the pump, said pump including a piston having a plug valve incorporated therein which has limited reciprocable movement within an extension of the piston, the flow area within the piston downstream from the plug being proportioned, by restriction if necessary, to equal the flow area past the plug.

REFERENCES:
patent: 61209 (1867-01-01), Kelly
patent: 573860 (1896-12-01), Chapman
patent: 706861 (1902-08-01), Sotte
patent: 1221843 (1917-04-01), Dierks
patent: 1538855 (1925-05-01), Jackson
patent: 1580915 (1926-04-01), Pledger
patent: 1663610 (1928-03-01), Phelps
patent: 1738167 (1929-12-01), Berkey
patent: 1793572 (1931-02-01), Von Linde
patent: 2090209 (1937-08-01), Larson et al.
patent: 2775212 (1956-12-01), Hilton
patent: 2791970 (1957-05-01), Hunter
patent: 2933050 (1960-04-01), Crowl et al.
patent: 3109384 (1963-11-01), Adams
patent: 4332533 (1982-01-01), Spears

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