US PATENT SUBCLASS 251 / 319
.~ Push or pull operator

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

318  DF  RECIPROCATING VALVE {7}
319.~ Push or pull operator {1}
320  DF  .~.~> Biased {1}

DEFINITION

Classification: 251/319

(under subclass 318) Valves actuated by a reciprocating means (e.g., push and pull button or rod).