Title:
ウォータポンプ
Document Type and Number:
Japanese Patent JP5197722
Kind Code:
B2
Abstract:
A water pump includes a pump shaft surrounded by a pump housing having a tubular section. A pulley having a cylindrical section and a flange wall is mounted on an end section of the pump shaft. An impeller is mounted on the other end section of the pump shaft. A mechanical seal is coaxially disposed between the tubular section and the pump shaft. A bearing is coaxially disposed between the tubular section of the pump housing and the cylindrical section of the pulley. In this water pump, the pump shaft includes a coaxial small diameter shaft section located at its first part which is located axially between the mechanical seal and the flange wall. The small diameter shaft section has a diameter smaller than a diameter of a second part of the pump shaft on which the mechanical seal is disposed so as to form an annular step portion.
Inventors:
Shingo Murakami
Junichiro Onigata
Junichiro Onigata
Application Number:
JP2010263386A
Publication Date:
May 15, 2013
Filing Date:
November 26, 2010
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
F04D29/044; F04D29/42
Domestic Patent References:
| JP2004293467A | ||||
| JP1285699A | ||||
| JP63096363A | ||||
| JP2003328992A | ||||
| JP59160889U |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Previous Patent: JPS5197721
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