(under the class definition) Apparatus in which the motor is provided with a quantity of trapped liquid which is applicable to the working member to move same, means to apply pneumatic pressure directly to said trapped liquid to actuate said working member and valve means for controlling the pneumatic fluid.
(1) Note. Pneumatic fluid under this definition is considered to be any fluid in the gaseous state.
SEE OR SEARCH CLASS
60, Power Plants,
547+, for hydraulic pulsators, i.e. a motor piston and pump piston with a trapped quantity of fluid there-between, and means to apply pneumatic pressure to the pump piston to actuate the motor piston.
92, Expansible Chamber Devices,
81, for expansible chamber devices in which the working member forms a reservoir for noncompressible working fluid and subclass 142 for expansible chamber devices having a reservoir for noncompressible working fluid.
