(under subclass 218) Apparatus in which a throttle valve and distributor are in series in a fluid flow path, the throttle valve controlling fluid flow to or from the motor, and in which the operating means for the throttle valve and distributor are so related that (1) the throttle valve is moved to vary the flow and the distributor is adjusted to vary the cycle of motive fluid distribution with respect to the working member movement cycle, in response to the same motor condition (e.g., speed) or to the same operation of a common control means, or (2) either the throttle valve, or distributor, is adjusted to vary the flow of motive fluid, or the cycle of motive fluid distribution with respect to the working member movement cycle, respectively, in response to the change of a condition (e.g., pressure) resulting from the adjustment of the distributor or throttle valve respectively.
(1) Note. The inherent variation in the speed of operation of a motive fluid actuated distributor resulting from a pressure change in the motive fluid due to throttle valve adjustment is not considered as a variation in the cycle of motive fluid distribution with respect to the working member movement cycle, under this definition.
