US PATENT SUBCLASS 4 / 370
.~.~.~.~ By releasing trapped air

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

300  DF  FLUSH CLOSET {22}
353  DF  .~ Tank only {9}
368  DF  .~.~ With outlet siphon {6}
369  DF  .~.~.~ Including means to relieve trapped air {2}
370.~.~.~.~ By releasing trapped air

DEFINITION

Classification: 4/370

By releasing trapped air:

(under subclass 369) Subject matter wherein the air escapes into the atmosphere directly and lowers the pressure to cause liquid flow through the siphon.

(1) Note. If the air is forced out with the liquid or allowed to expand, the patents are not proper for this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

369, for means to force air out with the liquid.

371, for means to allow the air to expand.