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Title:
PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049660
Kind Code:
A1
Abstract:
This pump device is provided with a first bearing (B1) and a second bearing (B2) which rotatably support a drive shaft that rotationally drives a pump element. The first bearing (B1) has a first lubrication groove (B1c). The second bearing (B2) has a second lubrication groove (B2c). The cross-sectional area (SB2c) of a cross-sectional surface, perpendicular to the rotation axis line (14a), of the second lubrication groove (B2c) is formed larger than the cross-sectional area (SB1c) of a cross-sectional surface, perpendicular to the rotation axis line (14a), of the first lubrication groove (B1c).

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JP2017115840VANE PUMP DEVICE
Inventors:
NAKAZONO, Tomohiko (7-1, Onna 4-chome, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
UCHIDA, Yukio (7-1, Onna 4-chome, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
MURAMATSU, Satoshi (7-1, Onna 4-chome, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
Application Number:
JP2018/030899
Publication Date:
March 14, 2019
Filing Date:
August 22, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F04C2/344; F04C14/22; F04C15/00
Foreign References:
JPH09166094A1997-06-24
JPH07279871A1995-10-27
JP2001107879A2001-04-17
JPS4825691B11973-07-31
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (Ekisaikai Bldg. 1-29, Akashi-cho, Chuo-k, Tokyo 44, 〒1040044, JP)
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