US PATENT SUBCLASS 123 / 41.02
.~ Automatic coolant flow control

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

41.01  DF  COOLING {27}
41.02.~ Automatic coolant flow control {4}
41.03  DF  .~.~> Float control
41.04  DF  .~.~> Shutters, air valves, dampers or adjustable cowls {3}
41.08  DF  .~.~> Valves for fluid coolant {1}
41.11  DF  .~.~> Air impeller {1}

DEFINITION

Classification: 123/41.02

(under subclass 41.01) Devices with means to sense some condition, which means causes operation of a control device for stopping, varying, or starting the flow of either the primary or secondary coolant.

(1) Note. Control of replenishment from a reserve supply, which may be condensate, is included.

(2) Note. The inclusion of significant engine structure or specific engine operation is the characteristic which distinguishes this type of device from those found in Class 236.

SEE OR SEARCH CLASS

126, Stoves and Furnaces,

351, for thermostatic valves.

137, Fluid Handling, 457, and 468 for valves controlled by change in the line temperature.

236, Automatic Temperature and Humidity Regulation,

34+, for automatic coolant flow control. See (2) Note.