US PATENT SUBCLASS 137 / 118.07
.~.~.~.~ With external control for correlating valve (e.g., manual)

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}
118.01  DF  .~.~ Plural outflows {5}
118.06  DF  .~.~.~ Pressure responsive {1}
118.07.~.~.~.~ With external control for correlating valve (e.g., manual)

DEFINITION

Classification: 137/118.07

With external control for correlating valve (e.g., manual):

(under subclass 118.06) Subject matter wherein, in addition to the pressure responsive sensor, the outflows are controlled by a device independent of the condition of the flow line.

(1) Note. Modifiers which merely vary the loading are not deemed to constitute external control means within this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

481, for suction controlled valves which are manually modified or adjusted.

522+, for direct response valves in combination with external means for opposing the closing bias.

613+, for system comprising plural valves arranged in series in the flowline wherein manual or external means operate one valve to produce a change in the condition in the flowline in order to utilize such changed condition to effect automatic operation of the other valve in the flowline.