Electrically driven pump device with three dimensional passage

Details Electrically driven pump device with three dimensional passage Electrically driven pump device with three dimensional passage

1999-02-09

2000-08-29

Walberg, Teresa

Pumps

Motor driven

Electric or magnetic motor

4174231, F04B 1700, F04B 3504

Patent

active

061098914

ABSTRACT:
A washer pump device has a cylindrical central housing, a motor, a top housing and a bottom housing for accommodating a motor and an impeller. The central housing comprises an outer wall and an inner wall arranged coaxially. A groove is formed in the bottom surface of the outer wall and is closed by a flange of the bottom housing to provide a horizontally extending arcuate passage. One end of the passage is open to the outside of the housing through an air vent which extends in a vertical direction. The other end of the passage is open to the inside of the housing through an air vent which extends in a vertical direction. The passage and two air vents form a three dimensional passage so that water droplets are restricted from entering into a motor housing chamber.

REFERENCES:
patent: 3759290 (1973-09-01), D'Alba
patent: 5184946 (1993-02-01), Sato
patent: 5480289 (1996-01-01), Lee
patent: 6017191 (2000-01-01), Harmsen
patent: 6037688 (2000-03-01), Gilliland et al.

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