Displacement screw-pump type

Full Title

Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution (control of exclusively fluid gearing F16H61/38) > with liquid motor and pump combined in one unit > pump and motor being of the same type > in which a rotor on one shaft co-operates with a rotor on another shaft > Displacement screw-pump type