To prevent decrease in pump efficiency, increase of noise, and decrease in durability by suppressing jumping of a blade in a rotary type fluid machine.
In a liquid pump, liquid is taken in a cell CL on an intake port side for increasing volume accompanied by rotation of an eccentric rotor 11 through the intake port, and the liquid is then discharged from a cell CH on a discharge port side for decreasing the volume after the volume reaches the maximum volume through the discharge port. A tip of the blade 12 is formed by inclining to the cell CL side,such that the tip forms a convex surface 12a always contacted at one point with a peripheral surface of the eccentric rotor 11 when seen from a rotation axis of the eccentric rotor 11 and such that distance LL along the convex surface 12a from a contact point T of the eccentric rotor 11 and the blade 12 to one side surface 12b of the blade 12 exposed to the intake port side always becomes longer than distance LH along the convex surface 12a from the contact point T to the other side surface 12c of the blade 12 exposed to the discharge port side.
KANNON TATSUZO
TAKEUCHI MASAMITSU
