US PATENT SUBCLASS 251 / 336
BIASED VALVE


Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

336BIASED VALVE {2}
337  DF  .~> Springs and spring retainers
338  DF  .~> Weight biased


DEFINITION

Classification: 251/336

(under the class definition) Subject matter wherein the valve has one position which it will maintain under the influence of a spring or weight which comprises a biasing means, and force must be applied to the valve in order to have it take a different position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

66+, for biased trip valves, and see the search notes thereto.

75, for valves having means to produce a snap action, which usually include biasing means.

SEE OR SEARCH CLASS

137, Fluid Handling,

455+, for line condition responsive valves, most of which involve biasing means, and see especially subclasses 524 and 530 for adjustable biasing means and 511+ for direct response condition responsive valves, i.e., check and safety valves. 222, Dispensing,

511+, for resilient biasing means for dispenser outlet elements.