Pumps – Motor driven – Electric or magnetic motor
Patent
1991-11-07
1993-02-09
Bertsch, Richard A.
Pumps
Motor driven
Electric or magnetic motor
417360, F04B 3504
Patent
active
051849461
ABSTRACT:
A windshield washer pump assembly for jetting a rinsing fluid from a fluid tank onto a windshield to assist windshield wiping operation performed by an automotive windshield wiper. The assembly comprises a washer pump comprising a rotatably supported impeller and a generally cylindrical casing having a fluid inlet, defined in an annular end wall thereof, and a fluid outlet defined in opposition to the fluid inlet. The washer pump is secured to a wall of the fluid tank with the fluid inlet positioned inside the fluid tank. The casing is also formed with a partition wall positioned on one side of the annular end wall to define a pump chamber between the annular end wall and the partition wall for operatively accommodating the impeller. The washer pump assembly also comprises a fluid passage communicating the pump chamber and the fluid outlet for a discharge of the fluid medium under pressure during a rotation of the impeller, a filter member having a perforated region of a diameter greater than the bore size of the fluid inlet positioned exteriorly of the fluid inlet with the perforated region aligned with the fluid inlet, and a filter holder for detachably securing the filter member to the second end of the casing.
REFERENCES:
patent: 4461614 (1984-07-01), Niedermeyer
patent: 4591319 (1986-05-01), Takahashi et al.
patent: 4966534 (1990-10-01), Hasslen, III
patent: 5074764 (1991-12-01), Kobayashi et al.
Asmo Co. Ltd.
Bertsch Richard A.
Freay Charles G.
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