Valve system for a reciprocating device
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United States of America Patent
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-
May 9, 1989
Grant Date -
N/A
app pub date -
Nov 22, 1982
filing date -
Nov 22, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A reciprocable device comprising a reciprocable member mounted for reciprocating movement within a chamber and a valve system for controlling the supply of fluid under pressure to the reciprocable member to bring about reciprocation of such member. A motor is enabled by the reciprocable member to operate the valve system whereby at least some of the force for driving the valve system is obtained from the motor and not from the reciprocable member.
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