Motors: expansible chamber type – With motive fluid valve – Valved piston
Patent
1987-12-14
1989-05-02
Garrett, Robert E.
Motors: expansible chamber type
With motive fluid valve
Valved piston
91419, F15B 1522, F16K 1518
Patent
active
048257524
ABSTRACT:
An impact relief valve and apparatus is disclosed which includes a hydraulic pump connected by two feed lines to a hydraulic cylinder. A first feed line provides fluid below a piston of the cylinder and the second feed line provides fluid above the piston providing a means to cause reciprocal motion of the piston within a cylinder housing. The piston is provided with at least one impact relief valve adapted to be opened upon impact of the piston with the housing at the top of the stroke of the piston whereby when fluid from the first feed line pushes the piston to the top of its stroke, the impact valve or valves are caused to open allowing any additional fluid pressure from the first line to pass through the second feed line to a suction side of the pump thereby reducing power requirements for the pump. An annular ridge on the cylinder head opens the impact relief valves.
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Commercial Shearing Inc.
Garrett Robert E.
Kapsalas George
Shaffer Thomas R.
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