US PATENT SUBCLASS 137 / 109
.~ Self-controlled branched flow systems

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

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
109.~ Self-controlled branched flow systems {4}
110  DF  .~.~> Dividing and recombining
111  DF  .~.~> Plural inflows {2}
115.01  DF  .~.~> Bypass or relief controlled by main line fluid condition {3}
118.01  DF  .~.~> Plural outflows {5}

DEFINITION

Classification: 137/109

(under subclass 87.01) Systems in which a single flow is divided into a plurality of flow paths or a plurality of flow paths are combined into a single flow path or in which a single flow path is divided and then recombined, and in which the flow in one branch or line is controlled in response to a change in a condition in another branch or line.

(1) Note. This and indented subclasses takes only those systems which include some significant branched structure such as having a valve and/or sensing means in a plurality of the branches or which require branched flow in order to be operative. For example, a pressure flow line having a mere relief valve or pressure relief passage mounted in the side is not classifiable as a branched system, because the outflow end of the line is not necessary for the operation of the pressure relief valve; such valves operate in the same manner when applied to a tank.

(2) Note. Plural relief valves opening into the atmosphere or the same tank or source are not branched flow systems, nor is a valve in which the flow is divided and recombined within the same valve body a branched flow system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

455+, for relief and other condition responsive valves whether mounted in a flow line or in a container. (See (1) Note.)

561+, for branched flow distribution systems in which there is no control of a flow in response to a change in a sensed condition.