US PATENT SUBCLASS 137 / 42
.~.~ Pressure or head controlled

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

38  DF  CONTROL BY CHANGE OF POSITION OR INERTIA OF SYSTEM {5}
40  DF  .~ Position relative body of water (e.g., marine governors) {2}
42.~.~ Pressure or head controlled

DEFINITION

Classification: 137/42

(under subclass 40) Apparatus which includes means to sense the pressure or head of the body of water in which the system exists.

SEE OR SEARCH THIS CLASS, SUBCLASS:

403+, for liquid level responsive or maintaining systems in which the level is determined by head or pressure.