US PATENT SUBCLASS 166 / 334.3
.~.~.~ Drain-type

Current as of: June, 1999
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166 /   HD   WELLS

316  DF  VALVES, CLOSURES OR CHANGEABLE RESTRICTORS {5}
332.1  DF  .~ Longitudinally movable operator {8}
334.1  DF  .~.~ Vertical movement of conduit {3}
334.3.~.~.~ Drain-type

DEFINITION

Classification: 166/334.3

Drain type:

(under subclass 334.1) Vertical movement of conduit wherein the flow regulating device allows excess fluid to escape.

SEE OR SEARCH THIS CLASS, SUBCLASS:

332.8, for drain valves operated by longitudinal movement.