US PATENT SUBCLASS 251 / 99
.~.~.~ With spring

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

89  DF  WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR {6}
95  DF  .~ Released by non-valving actuator motion {3}
98  DF  .~.~ Pivoted handle {1}
99.~.~.~ With spring

DEFINITION

Classification: 251/99

(under subclass 98) Devices wherein the pivotally mounted handle is spring biased in the blocking or disabling position.