| US 7,588,433 B2 | ||
| Vane pump | ||
| Yoshinobu Kishi, Toyota (Japan); Kikuji Hayashida, Toyota (Japan); and Kiyotaka Ohtahara, Toyota (Japan) | ||
| Assigned to Taiho Kogyo Co., Ltd., Toyota-shi, Aichi (Japan) | ||
| Appl. No. 11/884,217 PCT Filed Jan. 31, 2006, PCT No. PCT/JP2006/301555 § 371(c)(1), (2), (4) Date Aug. 10, 2007, PCT Pub. No. WO2006/087904, PCT Pub. Date Aug. 24, 2006. |
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| Claims priority of application No. 2005-039643 (JP), filed on Feb. 16, 2005. | ||
| Prior Publication US 2008/0159896 A1, Jul. 03, 2008 | ||
| Int. Cl. F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01) | ||
| U.S. Cl. 418—255 [418/76; 418/81; 418/112; 418/145] | 5 Claims |
| 1. A vane pump comprising:
a housing having a pump room, the pump room having an approximately circular inner wall;
a rotor rotating at an eccentric position relative to a center of the pump room and sliding in contact with a part of the
inner wall of the pump room; and
a vane rotated by the rotor, for dividing the pump room into a plurality of spaces full-time,
wherein in the housing, among spaces divided by a center line drawn between the center of the pump room and a center of rotation
of the rotor, an intake passage in one space and an exhaust passage in another space are formed, respectively,
an oil supply passage intermittently communicating with the pump room owing to the rotation of the rotor is formed in the
rotor and the housing,
a lubricating oil is intermittently fed through a communicating hole of the oil supply passage formed in the pump room, the
communicating hole being formed in a space on a side of the exhaust passage from a center line in the pump room and being
formed at a back side from a position at which the exhaust passage is formed, the back side being seen from an upstream side
in a rotational direction of the vane, and
the vane passes the communicating hole at the same time when the oil supply passage and the pump room are adapted to communicate
with each other.
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