Windshield wiper system

Details Windshield wiper system Windshield wiper system

1985-12-16

1987-09-08

Shoop, Jr., William M.

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

318DIG2, 1525017, B60S 108

Patent

active

046926771

ABSTRACT:
A windshield wiper system for motor vehicles includes an electric motor which drives at least one wiper during normal wiper operation, too and fro between two reversing positions within a wiping area. When the wiper system has been switched off by means of an operating switch, the wiper is moved to a concealed parking position outside the wiping area. Upon switching on of the wiper system and during normal operation the motor runs in one direction of rotation, but for moving the wipers into the parking position the motor runs in the other direction of rotation. A position switch is changed over by a switching member coupled with a rotating drive member of the electric motor. The position switch, after the operating switch has been switched off, releases a signal for reversing the polarity and in the parking position releases a signal for switching off the electric motor. So that the wiping cycle for entering the parking position begins in the first reversing position adjacent to the parking position and the wiper occupies the first reversing position in the dwell time interval of intermittent operation, the position switch is changed over independently of the direction of rotation of the electric motor and always in the same position of the drive member.

REFERENCES:
patent: 3675103 (1972-07-01), Elliott
patent: 4271381 (1981-06-01), Munz et al.
patent: 4276501 (1981-06-01), Fanz
patent: 4309646 (1982-01-01), Liedtke et al.

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