Title:
PUMP DEVICE
Document Type and Number:
Japanese Patent JP2019044747
Kind Code:
A
Abstract:
To provide a pump device having a simple structure and capable of effectively restraining leakage of hydraulic oil.SOLUTION: A pump device comprises a first bearing B1 and a second bearing B2 for rotatably supporting a driving shaft for rotationally driving a pump element. The first bearing B1 comprises a first lubrication groove B1c. The second bearing B2 comprises a second lubrication groove B2c. A cross-sectional area SB2c of a cross section orthogonal to a rotation axis 14a of the second lubrication groove B2c is made larger than a cross-sectional area SB1c of a cross section orthogonal to the rotation axis 14a of the first lubrication groove B1c.SELECTED DRAWING: Figure 5
Inventors:
NAKAZONO TOMOHIKO
UCHIDA YUKIO
MURAMATSU SATOSHI
UCHIDA YUKIO
MURAMATSU SATOSHI
Application Number:
JP2017171884A
Publication Date:
March 22, 2019
Filing Date:
September 07, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
F04C2/344; F04C14/22; F04C15/00
Domestic Patent References:
| JPH09166094A | 1997-06-24 | |||
| JPH07279871A | 1995-10-27 | |||
| JP2001107879A | 2001-04-17 | |||
| JPS4825691B1 | 1973-07-31 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation