(under subclass 41.56) Cooling means comprising means forming an air duct or passage for conducting cooling air to or against the engine including devices for controlling the flow of air through the duct or passages.
(1) Note. These devices for the most part include shutters mounted in or on cowling.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41.04+, for automatic control of shutters.
41.7, for cowlings surrounding the engine cylinders.
SEE OR SEARCH CLASS
49, Movable or Removable Closures, appropriate subclasses, particularly 74.1+, for louvers interconnected for concurrent movement.
180, Motor Vehicles,
69.2, for hoods having adjustable shutters combined therewith.
236, Automatic Temperature and Humidity Regulation,
35.2, for automatic shutter control.
454, Ventilation,
3+, for ventilating cowls and subclasses 284+ for registers.
