US PATENT SUBCLASS 251 / 93
.~.~.~ Mounted on valve actuator

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}
90  DF  .~ Attachments {2}
92  DF  .~.~ Acting on valve limit stop {1}
93.~.~.~ Mounted on valve actuator

DEFINITION

Classification: 251/93

(under subclass 92) Devices wherein the disabling means is fixedly attached to the valve stem or actuator.