Title:
OIL PUMP
Document Type and Number:
Japanese Patent JP2015045326
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an oil pump the whole of which can be miniaturized, the life of which can be extended while enabling the wear of a rotor upon being driven to be reduced, and the cost of which can be reduced.SOLUTION: The oil pump is comprised of: a pump body A comprised of a rotor chamber 11, a suction port 14 and a discharge port 15 formed in the rotor chamber 11, a suction oil path 14a communicated with the suction port 14, a discharge oil path 15a communicated with the discharge port 15, a relief valve 2, a relief chamber 18 formed on the relief discharge side of the relief valve 2, and a return oil path 3 formed between the relief chamber 18 and the suction oil path 14a; an outer rotor 91 supported by an inner periphery supporting wall part 11a of the rotor chamber 11; and an inner rotor 92. The return oil path 3 is formed in a recessed groove shape in the inner periphery supporting wall part 11a, and is opened along an outer peripheral face 91a on the side of the outer rotor 91.
Inventors:
SUGA YASUHIKO
TAGUCHI HIROYUKI
NISHIOKA SENTARO
TAGUCHI HIROYUKI
NISHIOKA SENTARO
Application Number:
JP2014121537A
Publication Date:
March 12, 2015
Filing Date:
June 12, 2014
Export Citation:
Assignee:
YAMADA SEISAKUSHO KK
International Classes:
F04C2/10; F04C14/26; F04C15/06
Domestic Patent References:
| JPS56124284U | 1981-09-21 | |||
| JP2008115821A | 2008-05-22 |
Foreign References:
| US6113360A | 2000-09-05 |
Attorney, Agent or Firm:
Kunio Iwabori