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Title:
VANE PUMP
Document Type and Number:
WIPO Patent Application WO/2018/198366
Kind Code:
A1
Abstract:
Provided is a vane pump 1 in which a cylindrical rotor 18 is arranged within an accommodation space 10 provided to a pump housing 2, pump chambers 20 are defined on both sides of the rotor 18, both sides of an outer circumferential surface of the rotor 18 orthogonal to the direction in which the pump chambers 20 are arranged in parallel are made to face the inner circumferential surface of the accommodation space 10 with a minute gap therebetween, and the tip of a vane 21 provided so as to be capable of protruding and retracting from the outer circumferential surface of the rotor 18 together with rotation of the rotor 18 is brought into sliding contact with the inner circumferential surface of the accommodation space while a fluid is taken in and discharged as a result of changing the capacity of each of the pump chambers 20. A pair of seal surfaces A having an arc-shaped cross section corresponding to the outer circumferential surface of the rotor 18 are formed on the inner circumferential surface of the accommodation space 10 and face the outer circumferential surface of the rotor 18 with a minute gap therebetween in the regions of each of said seal surfaces A. The seal surfaces A are each formed in regions offset toward the discharge sides of each of the pump chambers 20 in the direction of arrangement of the pump chambers 20 in parallel.

Inventors:
OGURA Takahiro (Odawara Branch 2480, Kuno, Odawara-sh, Kanagawa 55, 〒2500055, JP)
Application Number:
JP2017/017070
Publication Date:
November 01, 2018
Filing Date:
April 28, 2017
Export Citation:
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Assignee:
MIKUNI CORPORATION (13-11, Sotokanda 6-chome Chiyoda-k, Tokyo 21, 〒1010021, JP)
International Classes:
F04C18/344; F04C25/02
Foreign References:
US2831631A1958-04-22
JPS57146090A1982-09-09
US2990109A1961-06-27
JP2000199485A2000-07-18
Attorney, Agent or Firm:
NAGATO, Kanji (5F Hyakuraku Bldg, 8-1 Shinbashi 5-chome, Minato-k, Tokyo 04, 〒1050004, JP)
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