US PATENT SUBCLASS 123 / 188.4
.~ Reciprocating valve

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

188.1  DF  VALVE {10}
188.4.~ Reciprocating valve {3}
188.15  DF  .~.~> Shepherd type
188.2  DF  .~.~> Poppet {2}
188.5  DF  .~.~> Sleeve

DEFINITION

Classification: 123/188.4

Reciprocating valve:

(under subclass 188.1) Apparatus wherein the valve head slides to and fro during an opening and closing operation.