US PATENT SUBCLASS 137 / 461
.~.~ High pressure cut-off

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
456  DF  .~ Safety cut-off requiring reset {7}
461.~.~ High pressure cut-off

DEFINITION

Classification: 137/461

(under subclass 456) Apparatus in which the valve is closed in response to an increase in pressure beyond a maximum.

SEE OR SEARCH THIS CLASS, SUBCLASS:

505+, for line condition responsive valves which have separate connected reactor surfaces and are biased open.

517+, for line condition responsive valves of the direct acting type which are biased open.