Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1990-08-30
1992-04-07
Bertsch, Richard A.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
417569, F04B 2102
Patent
active
051023121
ABSTRACT:
A pump head having a manifold with a fluid inlet and outlet, suction and discharge valves mounted in a channels valve seat cartridge for controlling fluid flow, and a plunger mounted in a fluid cylinder adjacent the valve seat cartridge for pumping fluid through the pump head, and, in one embodiment, high strength valve springs. A spring for valves in a pump head and methods for treating them.
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Bertsch Richard A.
Butterworth Jetting System, Inc.
Freay Charles G.
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