(under subclass 131) Subject matter in which fluid-pressure means are used for actuating the movable units.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93, 100, 101, 116, 257, 271, 272, and 361+, for systems using fluid-pressure.
SEE OR SEARCH CLASS
60, Power Plants,
399, for a fluid- pressure actuator of general utility in which unsafeness, unreadiness or disarray prevents a manual change in the operative state of the system.
91, Motors: Expansible Chamber Type, appropriate subclasses, for the structure of the motor. 188, Brakes,
153, for fluid-pressure-operated brakes applied to rail vehicles.
303, Fluid-Pressure and Analogous Brake System, appropriate subclasses, for systems for distributing fluid to brake motors.
418, Rotary Expansible Chamber Devices, appropriate subclasses, for rotary expansible-chamber devices, per se.
