US PATENT SUBCLASS 251 / 67
.~ With second diverse control

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

66  DF  BIASED TRIP {5}
67.~ With second diverse control

DEFINITION

Classification: 251/67

(under subclass 66) Subject matter associated with means for normally actuating the port controller with trip device latched in its bias restraining position.