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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/208732
Kind Code:
According to the present invention, a pump chamber 32a, valve chambers 33a, 33b, discharge holes 33e, 33f, and flow paths 34, 35 are provided integrally with a housing 30. Thus, a stepped portion, etc. which inhibits the flow of a washing liquid W if the aforementioned components are formed as separate components, is not formed in a path through which the washing liquid W flows, so that the pressure loss of the washing liquid W can be reduced. The valve chamber 33a, 33b sides of the flow paths 34, 35 extend to the positions of the discharge holes 33e, 33f, respectively, so that the washing liquid W flowing out from the flow paths 34, 35 can be discharged at portions closer to the centers of the valve chambers 33a, 33b, respectively, as compared with those in conventional washer pumps. Accordingly, outlet portions of the flow paths 34, 35 can be close to inlet portions of the discharge holes 33e, 33f, respectively; a turbulent flow of the washing liquid W is suppressed inside the valve chambers 33a, 33b; and the pressure loss can be reduced.

OTANI, Atsushi (2681 Hirosawacho 1-chome, Kiryu-sh, Gunma 55, 〒3768555, JP)
ISHIKURA, Satoshi (2681 Hirosawacho 1-chome, Kiryu-sh, Gunma 55, 〒3768555, JP)
Application Number:
Publication Date:
December 07, 2017
Filing Date:
May 08, 2017
Export Citation:
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MITSUBA CORPORATION (2681, Hirosawacho 1-chome Kiryu-sh, Gunma 55, 〒3768555, JP)
International Classes:
F04D29/42; B60S1/48
Foreign References:
Attorney, Agent or Firm:
TSUTSUI & ASSOCIATES (3F Shinjuku Gyoen Bldg, 3-10 Shinjuku 2-chome, Shinjuku-k, Tokyo 22, 〒1600022, JP)
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