(under subclass 1) Subject matter in which there is additionally provided means for transmitting motion from the motor to the pump and control means for either (1) interrupting motion of the pump (e.g., clutch, lock, etc.), (2) varying the rate of motion of the pump (e.g., brake, adjustable gearing, etc.) or (3) changing the swept volume of pumping member or motor working member displacement of an expansible chamber-type pump or motor (e.g., stroke control).
