US PATENT SUBCLASS 137 / 329.2
.~.~ Check valve disabled by normally movable main valve part

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

315  DF  WITH REPAIR, TAPPING OR ASSEMBLY MEANS {6}
329.1  DF  .~ Removable valve with normally disabled supplemental check valve {1}
329.2.~.~ Check valve disabled by normally movable main valve part {2}
329.3  DF  .~.~.~> Ball check
329.4  DF  .~.~.~> Spring bias

DEFINITION

Classification: 137/329.2

(under subclass 329.1) Devices in which the check valve is biased opened by a part of the main valve which is movable in normal usage of the main valve. Usually a spacer or projection between the check valve and main valve is provided.