US PATENT SUBCLASS 251 / 22
.~.~ Control fluid released into closed build-up chamber

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


251 /   HD   VALVES AND VALVE ACTUATION

12  DF  FLUID ACTUATED OR RETARDED {12}
15  DF  .~ Compulsory cut-off after flow period {6}
22.~.~ Control fluid released into closed build-up chamber

DEFINITION

Classification: 251/22

(under subclass 15) Subject matter in which a control pressure normally maintaining the valve closed is momentarily reduced, so that the valve can open, by discharge into an empty closed chamber, but upon the subsequent rise in pressure, due to filling of the chamber, the valve recloses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33+, for choked pressure fluid type servo-motors in which the discharge of the fluid in the choke chamber is to waste or to the line, the flow being terminated by reverse movement of the pilot valve.