US PATENT SUBCLASS 137 / 87.01
SELF-PROPORTIONING OR CORRELATING SYSTEMS

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

87.01SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
88  DF  .~> Mixture condition maintaining or sensing {4}
94  DF  .~> Fuel controlled by boiler or water system condition
98  DF  .~> Self-proportioning flow systems {5}
102  DF  .~> Supply and exhaust type {3}
109  DF  .~> Self-controlled branched flow systems {4}
87.02  DF  .~> Liquid level responsive
87.03  DF  .~> Flow rate responsive {1}
87.05  DF  .~> Plural sensors {1}

DEFINITION

Classification: 137/87.01

SELF-PROPORTIONING OR CORRELATING SYSTEMS:

(under the class definition) Subject matter wherein a fluid flow in a first flow line is proportioned or correlated with the fluid flow in a second fluid flow line by a movable means, which is positioned in one of the fluid flow lines and controlling the fluid flow in the other fluid flow line in response to a sensor detecting a variable condition or characteristic of the fluid in the other fluid flow line.

(1) Note. The flow proportioning or correlating may constitute plural separate flow lines, branches of the same flow and a branch thereof.

(2) Note. The proportioning and correlating of the fluid flows may be continuous or discontinuous and may vary directly or inversely and according to any ratio or in any manner.

(3) Note. Systems that rely on static means (e.g., a jet pump) to produce a correlated flow are excluded.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155, for gas lift devices for wells including a valve between a gas line and a liquid column responsive to the pressure differential between the gas and the liquid.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation, 198.1+, for a system including a chemical feeder and a separating means.

222, Dispensing,

57, for dispensing of one material controlled by the weight, volume, or pressure of a second dispensed material.

251, Valves and Valve Actuation,

12+, for mere fluid pressure actuated valves, even though the

flow through the valve may be disclosed as being related or proportioned to the pressure in the fluid pressure actuator line.

399, Electrophotography,

237+, for liquid developer applied to a latent image within an electrophotos:graphic device.