US PATENT SUBCLASS 137 / 518
.~.~.~ Oppositely swinging vanes

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}
511  DF  .~ Direct response valves (i.e., check valve type) {14}
517  DF  .~.~ Biased open {3}
518.~.~.~ Oppositely swinging vanes

DEFINITION

Classification: 137/518

(under subclass 517) Valves comprising a pair of edge-pivoted vanes biased in opposite directions, the pivot means comprising closely adjacent parallel axes or both vanes being pivoted on the same axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

499, for line condition change responsive valve with a swinging vane reactor.