US PATENT SUBCLASS 4 / 686
.~.~.~ Standpipe overflow

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}
680  DF  .~ Drain and overflow {2}
682  DF  .~.~ With valve {3}
686.~.~.~ Standpipe overflow

DEFINITION

Classification: 4/686

Standpipe overflow:

(under subclass 682) Subject matter wherein the apparatus is substantially L shaped with a horizontal branch in fluid communication with the drain of the sink or bath so that water can rise in a vertical branch, matching the level in the sink or bath, until it reaches the overflow opening in the vertical branch which bypasses the drain valve to prevent overflow in the sink or bath to control the flow of fluid.