(under subclass 58.1) Clutches + in which the rotation is transmitted by means of the clutching fluid, which is forced between meshed gears.
(1) Note. Both this subclass, and Class 475, Planetary Gear Transmission Systems or Components, subclasses 91+, contain planetary units including gear pumps so arranged that when fluid flow through the pump is unrestricted, the unit slips, as the fluid flow is restricted, the unit planetates, and when fluid flow is completely shut off, the gear elements forming the pump are locked against relative rotation and the unit is locked. Where a planet pinion of the unit drives a separate gear pump, the pump, in fact, operates as a planet pinion brake, and such art will be found in the appropriate one of the above listed subclasses in Class 475. Where a planet pinion and its intermeshing sun or orbit gear together constitute the gear pump, the device will be found in this subclass (192/61).
SEE OR SEARCH CLASS
188, Brakes,
292, for similar structure used as a brake.
418, Rotary Expansible Chamber Devices,
54+, for rotary expansible chamber devices for working members having planetary or planetating movement; subclasses 166+ for rotary expansible chamber devices of the moving cylinder type having intermeshing peripheral surfaces and subclasses 191+ for rotary expansible devices having interengaging rotary members. 475, Planetary Gear Transmission Systems or Components,
