US PATENT SUBCLASS 251 / 109
.~.~.~ 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}
101  DF  .~ Latch manipulator mounted on handle or stem {3}
107  DF  .~.~ With pivoted latch {2}
109.~.~.~ With spring

DEFINITION

Classification: 251/109

(under subclass 107) Devices wherein the latch is spring biased.