The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1986
Filed:
Jan. 16, 1985
Jeffrey J Buschur, Beavercreek, OH (US);
Ernest G Franklin, Kettering, OH (US);
William S Shufflebarger, Beavercreek, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
In a windshield wiper drive system of the type having a reciprocating drive link and a reversible electric motor, a variable throw crank arm assembly between the drive link and the motor drive shaft including a first arm rigidly attached to the drive shaft, a second arm pivotally attached to the first arm and to an end of the drive link, a guide follower on the second arm, and a guide channel on the motor housing receiving the guide follower. The guide channel has a circular portion centered on the drive shaft axis and a noncircular escape portion radially outboard of the circular portion and merging therewith at a junction. When the drive shaft rotates continuously in one direction, the guide follower traverses the circular portion and holds the second arm in a short-throw folded position relative to the first arm. When the drive shaft rotates in the opposite direction, the guide follower automatically enters the escape portion and concurrently pivots the second arm to a long-throw unfolded position relative to the first arm.