US PATENT SUBCLASS 251 / 129.02
.~ With means to bias valve open

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

129.01  DF  ELECTRICALLY ACTUATED VALVE {11}
129.02.~ With means to bias valve open

DEFINITION

Classification: 251/129.02

With means to bias valve open:

(under subclass 129.01) Subject matter wherein a spring, fluid pressure, or other agent is used to maintain the valve in a position which allows the fluent material to flow through the passage until the valve actuator moves the valve to a position which closes the passage.