US PATENT SUBCLASS 137 / 105
.~.~.~ With pulsation responsive 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}
102  DF  .~ Supply and exhaust type {3}
103  DF  .~.~ Vacuum or suction pulsator type (e.g., milking machine) {2}
105.~.~.~ With pulsation responsive pilot valve

DEFINITION

Classification: 137/105

(under subclass 103) Apparatus wherein the flow controlling valve is moved by a fluid servo under control of a second valve which is itself fluid operated under control of the first valve, there being no mechanical linkage between the two valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

488+, for line condition change responsive fluid pressure type servo or pilot controlled valves.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

28+, for fluid servo or pilot actuated valves having fluid actuated pilot valve.