Pumps – Expansible chamber type – Including valve assembly – disassembly – or inspection...
Patent
1994-10-05
1995-12-05
Bertsch, Richard A.
Pumps
Expansible chamber type
Including valve assembly, disassembly, or inspection...
417554, 417567, 417569, 13753315, F04B 5310, F04B 5322
Patent
active
054723264
ABSTRACT:
This invention relates to an improvement in valve assemblies for reciprocating sucker rod operated subsurface pumps and specifically as to the traveling valves and standing valves. The traveling valve includes a valve body having an inwardly-directed lip at the bottom with the valve seat, ball and cage inserted from the top of the valve body. Further the standing valve is positioned in the upper portion of a bushing threaded into the bottom of the pump barrel, thus placing the standing valve and the traveling valve in closer proximity at the bottom of the downstroke than prior such pumps.
REFERENCES:
patent: 1523575 (1925-01-01), Beloit
patent: 2180865 (1939-11-01), Connor
patent: 3220354 (1965-11-01), Sutcliff
patent: 5178184 (1993-01-01), Sillman
Bertsch Richard A.
McAndrews, Jr. Roland G.
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