US PATENT SUBCLASS 4 / 688
.~ Drain valve


Current as of: June, 1999
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4 /   HD   BATHS, CLOSETS, SINKS, AND SPITTOONS

679  DF  DRAIN, OVERFLOW OR TRAP FOR A SINK OR BATH {3}
688.~ Drain valve {2}
689  DF  .~.~> Pop-up {1}
693  DF  .~.~> Operating means in sink or bath


DEFINITION

Classification: 4/688

Drain valve:

(under subclass 679) Subject matter wherein the apparatus has within a means to open, close or modify a passage in fluid communication with the drain of the sink or bath to control the flow of fluid.

(1) Note. A stopper is distinguished from a valve by being bodily removable from the sink or bath structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

671+, for a drain valve combined with a supply outlet.

682+, for a drain valve combined with an overflow.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation, for a valve in general,

213+, for a mechanical movement actuator and especially subclasses 231+ a lever type mechanical movement actuator.