US PATENT SUBCLASS 137 / 300
.~ With supplemental 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

272  DF  HYDRANT TYPE {15}
300.~ With supplemental valve

DEFINITION

Classification: 137/300

(under subclass 272) Apparatus which includes an additional valve independent of the main valve and exposed to fluid upstream of the main valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

290, for hydrants having a single main valve which is located upstream from the base of the riser.

613+, for systems including a single flow path with plural serial valves, and see the search notes to subclass 613.