US PATENT SUBCLASS 251 / 83
.~.~ Spring

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

77  DF  LOST MOTION BETWEEN ACTUATOR AND VALVE {3}
82  DF  .~ Check valve with external opening and closing means {1}
83.~.~ Spring

DEFINITION

Classification: 251/83

(under subclass 82) Devices wherein the movement of the valve is modified by a spring.