(under subclass 170.11) Subject matter wherein the determination of the velocity or the direction of fluid flow is made by measuring or sensing a thermal effect caused by the flow of the fluid.
(1) Note. Such measurement often includes determination of the cooling effect upon a heated element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118.2, for measuring intake air flow in an internal combustion engine.
198, for fluid flow measuring combined with diverse subject matter.
202.5, for thermal sensing of flow including an auxiliary testing of a flow path.
204.11+, for thermal sensing of flow rate.
861.95, for measuring by use of a thermal tracer or tag. SEE OR SEARCH CLASS
374, Thermal Measuring and Testing, appropriate subclasses for measuring and testing of a thermal effect, per se; particularly,
29+, for heat flow measurement and subclasses 43+ for heat flow coefficient measuring.
