US PATENT SUBCLASS 251 / 88
.~ Rotatable only

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

84  DF  VALVE HEAD MOVABLY CONNECTED FOR ACCOMMODATION TO SEAT {4}
88.~ Rotatable only

DEFINITION

Classification: 251/88

(under subclass 84) Devices in which the valve head rotates only, usually with the axis of the valve stem as the center of rotation.