US PATENT SUBCLASS 123 / 41.04
.~.~ Shutters, air valves, dampers or adjustable cowls

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

41.01  DF  COOLING {27}
41.02  DF  .~ Automatic coolant flow control {4}
41.04.~.~ Shutters, air valves, dampers or adjustable cowls {3}
41.05  DF  .~.~.~> Temperature and engine operation responsive
41.06  DF  .~.~.~> Servomotor-operated type
41.07  DF  .~.~.~> Interrelated shutter and throttle control

DEFINITION

Classification: 123/41.04

(under subclass 41.02) Cooling systems wherein the primary or secondary coolant is air or gas and the device for stopping, varying, or starting the flow of the air or gas is a shutter, valve, damper, adjustable cowl, etc.

SEE OR SEARCH CLASS

49, Movable or Removable Closures, appropriate subclasses, particularly

74.1+, for louvers interconnected for concurrent movement.

160, Flexible or Portable Closure, Partition, or Panel, appropriate subclass, for curtains, shades or screens, for radiator protectors.

236, Automatic Temperature and Humidity Regulation,

35.2, for automatic shutter control. 454, Ventilation,

3+, for ventilating cowls and subclasses 284+ for registers.