(under subclass 35) Apparatus in which the motor has a cycle of operation in which the working member moves in one direction, reverses its direction of movement and returns to the original position, so as to be in condition to repeat the operation, and in which a distributor is provided to control the flow of motive fluid to cause the motor to operate through said cycle, said distributor being driven independently of said motor and not in consequence of motion or operation of the motor to cause the motor to operate continuously repeating said cycle.
(1) Note. For the definition of distributor see (2) Note of subclass 218 of this class.
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2, for expansible chamber motors having means to stop or change the mode of operation of same after a predetermined
number of cycles or revolutions.
218+, for cyclically operable expansible chamber motors in which the motive fluid is controlled as a consequence of motor working member movement or cyclic change of pressure in a working chamber.
429, for expansible chamber motors having independent means to drive a distributor valve to provide pulses of fluid to opposite sides of a working member to maintain the working member in a "ready" or static friction-free state.
