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Patent Searching and Data


Title:
PLUNGER OIL PUMP
Document Type and Number:
Japanese Patent JP3956066
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a plunger oil pump capable of being miniaturized and preventing the lowering of discharge capacity to secure an excellent workability.
SOLUTION: A plunger 50 is composed of two members which are a pump working member 52 consisting of the same material as a housing 10 and a driving member 54 consisting of a material such as a wear resisting steel. A recessed part to fit on a projection of the driving member 54 is formed in the pump working member 52 with its depth nonarriving an outer wall. Thus the effective contact length of the pump working member 52 with the housing 10 can be made longer than a usual length. Since a gear 60 provided on the outer periphery of the driving member 54 is formed by rolling, and the length of an imperfect gear tooth part can be shortened than usual length, two bearing parts 62, 64 can be formed in the driving member 54 to secure the excellent workability of the driving member 54.


Inventors:
Norio Takehana
Hisanori Ito
Katsuya Yoneda
Insider Nagahiko
Application Number:
JP19123497A
Publication Date:
August 08, 2007
Filing Date:
July 16, 1997
Export Citation:
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Assignee:
Mikuni Corporation
International Classes:
F04B7/06; F04B9/02; F04B9/04; (IPC1-7): F04B7/06; F04B9/02; F04B9/04
Domestic Patent References:
JP54117909A
JP7083163A
JP55015383U
JP6078650U
Attorney, Agent or Firm:
Keiichi Yashima