US PATENT SUBCLASS 137 / 115.16
.~.~.~.~ Bypass or relief valve biased open

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

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
109  DF  .~ Self-controlled branched flow systems {4}
115.01  DF  .~.~ Bypass or relief controlled by main line fluid condition {3}
115.13  DF  .~.~.~ Pressure responsive {9}
115.16.~.~.~.~ Bypass or relief valve biased open {1}
115.17  DF  .~.~.~.~.~> Increasing pressure progressively closes then reopens by-pass or relief valve

DEFINITION

Classification: 137/115.16

Bypass or relief valve biased open:

(under subclass 115.13) Subject matter wherein the bypass or relief passage is held open in absence of the fluid pressure by a flexibly adjustable device (e.g., a weight of the valve body itself, or a spring, or such similar flexible means).

SEE OR SEARCH THIS CLASS, SUBCLASS:

115.06, for flow rate responsive biased open bypass or relief valve.