US PATENT SUBCLASS 251 / 17
.~.~.~ Interconnected motion

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

12  DF  FLUID ACTUATED OR RETARDED {12}
15  DF  .~ Compulsory cut-off after flow period {6}
16  DF  .~.~ Serial main line cut-off and manual valves (e.g., hydraulic "fuses") {1}
17.~.~.~ Interconnected motion {1}
18  DF  .~.~.~.~> Manual and pilot valves

DEFINITION

Classification: 251/17

(under subclass 16) Subject matter in which the manual and fluid actuated or retarded valve are conjointly actuated at least during a portion of their motions.

(1) Note. In some disclosures in this subclass, one valve is manual only and one is opened manually and closed or retarded by fluid pressure means, and the first valve prevents flow during the manual opening of the second or fluid actuated valve and opens only when the fluid actuated or retarded valve has started its closing motion.