Title:
Oil pump
Document Type and Number:
Japanese Patent JP6152759
Kind Code:
B2
Abstract:
An oil pump includes a rotor (30), an outer peripheral member (40) accommodating the rotor (30), a first plate, and a second plate. A discharge passage (52K) through which hydraulic fluid is discharged is connected to a discharge port (10ex) of the first plate. A first pressure gradually-changing groove (10M) and a second pressure gradually-changing groove (20M) are formed such that a second flow passage area is larger than a first flow passage area, the first flow passage area being a flow passage area of the first pressure gradually-changing groove (10M) of the first plate, at a position at which the first pressure gradually-changing groove (10M) communicates with a transfer chamber (30V) passing through a sealed region, and the second flow passage area being a flow passage area of the second pressure gradually-changing groove (20M) of the second plate, at a position at which the second pressure gradually-changing groove (20M) communicates with the transfer chamber (30V) passing through the sealed region.
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Inventors:
Naoshi Yoshida
Kazuhiro Watanabe
Kazuhiro Watanabe
Application Number:
JP2013191503A
Publication Date:
June 28, 2017
Filing Date:
September 17, 2013
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
F04C2/344; F04C2/10; F04C15/00
Domestic Patent References:
| JP925809A | ||||
| JP1089266A |
Attorney, Agent or Firm:
Okada International Patent Office