US PATENT SUBCLASS 137 / 115.19
.~.~.~.~.~ Pilot valve


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

Internet Version by PATENTEC © 1999      Terms of Use



137 /   HD   FLUID HANDLING

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
109  DF  .~ Self-controlled branched flow systems {4}
115.01  DF  .~.~ Bypass or relief controlled by main line fluid condition {3}
115.13  DF  .~.~.~ Pressure responsive {9}
115.18  DF  .~.~.~.~ Bypass or relief valve responsive to pressure downstream of outlet valve {2}
115.19.~.~.~.~.~ Pilot valve


DEFINITION

Classification: 137/115.19

Pilot valve:

(under subclass 115.18) Subject matter comprising an auxiliary control valve and wherein the bypass or relief valve is controlled by the auxiliary control valve in response to the pressure in the main flow line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

488+, for a fluid pressure-type pilot control.