US PATENT SUBCLASS 137 / 435-- .~.~.~ With valve retarder or cushion means

US PATENT SUBCLASS 137 / 435
.~.~.~ With valve retarder or cushion means

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}
435		.~.~.~ With valve retarder or cushion means

DEFINITION

Classification: 137/435

(under subclass 434) Apparatus which includes in addition to the float mechanism, means to retard or cushion the rate of closing or opening of the flow controlling valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

470, for line pressure responsive valves which have a reactor component tending to close them as soon as they open.

624.11+, for a time controlled valve.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

12+, for fluid retarded valves, subclass 64 for valves with nonfluid retarders, and subclasses 118+ for valves with material guides or restrictors which retard the operation of a valve to which they are connected.