Electrically driven pump device with three dimensional passage
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 29, 2000
Grant Date -
N/A
app pub date -
Feb 9, 1999
filing date -
Jun 4, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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