Title:
VARIABLE-CAPACITY VANE PUMP
Document Type and Number:
WIPO Patent Application WO/2014/141888
Kind Code:
A1
Abstract:
In the present invention, a variable-capacity vane pump is provided with a plate, an intake-side back-pressure port, a discharge-side back-pressure port, an addition groove, and a connection groove. The plate includes a rotor, a vane, a cam ring, a pump chamber, an intake port, a discharge port, a back-pressure chamber, a sliding contact surface, and a through-hole. The intake-side back-pressure port guides a working fluid for the intake port to the back-pressure chamber in an intake section. The discharge-side back-pressure port guides a working fluid for the discharge port to the back-pressure chamber in a discharge section. The addition groove is provided to the sliding contact surface from between the discharge-side back-pressure port and the through-hole to between the intake-side back-pressure port and the through-hole. The connection groove interconnects the addition groove and the intake-side back-pressure port.
Inventors:
AKATSUKA KOICHIRO (JP)
FUJITA TOMOYUKI (JP)
KATO FUMIYASU (JP)
FUJITA TOMOYUKI (JP)
KATO FUMIYASU (JP)
Application Number:
PCT/JP2014/054836
Publication Date:
September 18, 2014
Filing Date:
February 27, 2014
Export Citation:
Assignee:
KAYABA INDUSTRY CO LTD (JP)
International Classes:
F04C2/344; F04C15/00
Foreign References:
| JPS5059804A | 1975-05-23 | |||
| JPS4949123B1 | 1974-12-25 | |||
| JP2009024570A | 2009-02-05 |
Attorney, Agent or Firm:
GOTO, Masaki et al. (JP)
Masaki Goto (JP)
Masaki Goto (JP)
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