US PATENT SUBCLASS 137 / 103
.~.~ Vacuum or suction pulsator type (e.g., milking machine)

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.~.~ Vacuum or suction pulsator type (e.g., milking machine) {2}
104  DF  .~.~.~> With trip linkage or snap action
105  DF  .~.~.~> With pulsation responsive pilot valve

DEFINITION

Classification: 137/103

(under subclass 102) Systems in which an outlet or receiver is alternately connected to a source of suction or vacuum and a source of fluid under pressure or vent (usually the atmosphere).

(1) Note. Many of the patents classified in this subclass are for milking machine pulsators.

SEE OR SEARCH THIS CLASS, SUBCLASS:

526, for vacuum relief valves of the type responding to fluid pressure exerted directly on the valve face.

SEE OR SEARCH CLASS

119, Animal Husbandry,

14.01+, for milking machines.