US PATENT SUBCLASS 137 / 451-- .~.~.~ Flexible valve

US PATENT SUBCLASS 137 / 451
.~.~.~ Flexible valve

Current as of: June, 1999
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137 /	HD	FLUID HANDLING

386	DF	LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409	DF	.~ By float controlled valve {11}
434	DF	.~.~ Float arm operated valve {14}
451		.~.~.~ Flexible valve

DEFINITION

Classification: 137/451

(under subclass 434) Apparatus in which the valve controlled by the float arm is made of or includes material which flexes during the closing action.

SEE OR SEARCH THIS CLASS, SUBCLASS:

525, for resilient material valves of the line condition responsive type.

793+, for diaphragms, per se, some of which constitute valve elements, and see the search notes to subclass 793.

SEE OR SEARCH CLASS

222, Dispensing, 490, for dispenser outlets comprising slitted resilient diaphragms or nipples, and see the search notes thereto.

251, Valves and Valve Actuation,

4+, for valves comprising flexible tubes and collapsing means therefor.