US PATENT SUBCLASS 251 / 8
.~.~ Screw actuated

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

4  DF  TUBE COMPRESSORS {4}
7  DF  .~ Perpendicularly reciprocating tube contacting element {1}
8.~.~ Screw actuated

DEFINITION

Classification: 251/8

(under subclass 7) Devices having screw means to actuate the contacting portion.