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:
Oct. 01, 1985
Filed:
Jan. 16, 1984
Harry C Buchanan, Jr, Spring Valley, OH (US);
William R Mack, Kettering, OH (US);
Jagmohan K Malhotra, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A transmission for a windshield wiper includes a non-circular pinion gear having a closed pitch curve with a basic elliptical segment and a circular segment and a non-circular output gear having an open pitch curve with a third order elliptical segment and a circular segment. The pinion and the output gears mesh such that the basic elliptical and third order elliptical pitch curve segments roll against each other and the circular pitch curve segments roll against each other so that the gear ratio of the combination varies sinusoidally through a first included angle of output gear rotation and remains substantially constant through a second included angle of output gear rotation.