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US 2015/0030486 A1Published application
Variable capacity vane pump
AssigneeKayaba Industry Co., Ltd.
InventorsTomoyuki Fujita, Masamichi Sugihara, Koichiro Akatsuka, Fumiyasu Kato
Life of this patent
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Abstract
In a variable capacity vane pump in which a discharge capacity of a pump chamber is varied by varying an amount of eccentricity of a cam ring relative to a rotor, a port inner wall surface that extends around an inner peripheral cam surface of the cam ring when the cam ring moves in a direction for increasing the amount of eccentricity of the cam ring relative to the rotor is formed on an intake port.
Claims3
A variable capacity vane pump used as a fluid pressure supply source, comprising:
- a rotor that is driven to rotate;
- a plurality of vanes housed in the rotor to be free to slide;
- a cam ring that includes an inner peripheral cam surface against which respective tip end portions of the vanes slide, and is capable of rotating eccentrically relative to a center of the rotor;
- a pump chamber defined by the rotor and the cam ring in between adjacent vanes;
- an intake port through which working fluid suctioned into the pump chamber is led;
- and
- a discharge port through which working fluid discharged from the pump chamber is led,
- wherein a port inner wall surface that extends around the inner peripheral cam surface of the cam ring when the cam ring moves in a direction for increasing an amount of eccentricity of the cam ring relative to the rotor is formed on the intake port.
5 more elements
Dependencies are inferred from the claim text.