US PATENT SUBCLASS 251 / 20
.~.~ Forced return of actuator to cut-off position

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}
20.~.~ Forced return of actuator to cut-off position

DEFINITION

Classification: 251/20

(under subclass 15) Subject matter in which the actuator which opens the valve is subjected to an overriding closing force by a fluid actuated or retarded device only after the completion of the desired flow period.

SEE OR SEARCH CLASS

222, Dispensing,

17+, for preset volume dispensers in which a moving cut-off operating element returns to its neutral setting during dispensing.