US PATENT SUBCLASS 4 / 255.11
.~ Force cup (e.g., a plunger)

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

255.01  DF  OBSTRUCTION REMOVER {3}
255.11.~ Force cup (e.g., a plunger) {1}
255.12  DF  .~.~> With one way valve

DEFINITION

Classification: 4/255.11

Force cup (e.g., a plunger):

(under subclass 255.01) Subject matter wherein the apparatus includes a flexible cup that is placed over the opening and manually flexed to agitate fluid to clean or clear the obstruction within or clear the obstruction from the drain pipe of the sink, bath, or flush closet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255.01+, for other cup like structure having a force or sealing function.