(under subclass 30) Subject matter in which a clutching medium envelopes at least one of a pair of clutch members and is a fluid or any substance the particles of which readily flow over each other.
SEE OR SEARCH CLASS
60, Power Plants,
330+, for fluid couplings which include the transmission of torque through kinetic forces resulting from acceleration and deceleration of the fluid effective between the driving and driven elements of the coupling. Where the driven element includes a fluid channel or space between vanes which communicates with regions of the driving element which are maintained at different fluid pressures or are moving at different velocities, the resulting forces are considered kinetic and such structures are found in Class 60.
188, Brakes,
266+, for a similar structure used as a brake.
464, Rotary Shafts, Gudgeons, Housings and Flexible Couplings for Rotary Shafts, 24+, for a flexible coupling wherein a liquid or gas is used to affect the coupling, and see the line note with Class 192 under the class definition of Class 464.
