To discharge to a vane chamber only a liquid-phase operating medium from a reservoir part of a rotor from which the liquid phase operating medium and the gas phase operating medium leak.
A supplementary chamber 48h having a suction port 48i opened toward the inside in the radial direction of the rotor and a discharge port 48j opened toward the outside in the radial direction is formed inside a vane 48 slidably fitted to a vane groove 49 of the rotor. When the vane 48 moves inward in the radial direction, only the suction port 48i communicates with the reservoir part 78 to suck the liquid phase operating medium in the supplementary chamber 48h, and when the vane 48 moves outward in the radial direction, only the discharge port 48j communicates with the vane chamber 75 in the exhaust stroke to discharge the liquid phase operating medium in the supplementary chamber 48h. Thus, the suction port 48i and the discharge port 48j do not communicate with the liquid reservoir part 78 and the vane chamber 75 at the same time, whereby the gas phase operating medium in the liquid reservoir part 78 is inhibited from flowing to the vane chamber 75 through the supplementary chamber 48h, and the gas phase operating medium having usable pressure energy can be prevented from being discharged wastefully.
TAKAHASHI TSUTOMU
KIMURA YASUSHIGE
ENDO TSUNEO
Kazuaki Niki
Next Patent: DRIVE DEVICE OF VEHICLE MOUNTED METER