Wiper driving apparatus
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United States of America Patent
Stats
-
Nov 26, 1991
Grant Date -
N/A
app pub date -
Sep 12, 1989
filing date -
Sep 16, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The wiper driving apparatus includes a driving gear driven by an electric motor for driving a wiper, a clutch member rotatable together with the driving gear in a predetermined driving direction of the driving gear, first and second electrically-conductive plates and first and second moving-contact segments which are rotated relative to the first and second electrically-conductive plates respectively while brought into a slidable contact therewith, respectively, to constitute a switch for opening and closing an electric circuit of the motor. A driven engaging projection of the clutch member extends towards the driving gear, and is disposed in a position differing in phase from a contact position by an angle of at least 90 degrees, preferaly by an angle of 180 degrees, in which contact position a contact point of the second moving-contact segment is brought into electrical contact with the second electrically-conductive plate.
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