Driving mechanism for wiper blades
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United States of America Patent
Stats
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Nov 17, 1987
Grant Date -
N/A
app pub date -
Oct 29, 1986
filing date -
Nov 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to driving mechanism for wiper blades of, for example, motor vehicles wherein two motors (14, 15) impart to the wiper arm, or to at least one of its elements, not only an oscillating, but also a translational (radial) movement. The oscillating movement is imparted to the wiper arm by means of a drive shaft (12) actuated by a first motor (14) and the radial movement is imparted to the wiper arm by means of the drive shaft (13) of a second motor (15) and by means of a conical gear (9a, 9b) associated with a screw/nut system (8, 7) wherein the nut (7) moves radially when the drive shaft (13) of the second motor (15) is rotating. The two movements of the wiper arm are controlled and regulated by an opto-electronical system comprising two slotted discs (14a, 15a), two reading heads (14b, 15b) and a micro-processor (19). Several embodiments of the invention are possible.
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