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:
May. 16, 1995
Filed:
Nov. 03, 1993
Bertel S Nelson, Rockford, IL (US);
Wedgtrac Corporation, Rockford, IL (US);
Abstract
Differential gearing is provided between an input shaft and an output shaft. The gearing comprises a pair of similar gear sets mounted in confronting, coaxial relation, and may comprise known differential gearing such, for example, as planetary gearing or harmonic drive gearing. A control effects differential speeds between the input and output shafts. A spring loaded friction clutch acts between the input and output shafts, and parallel with the differential gear sets, to reduce the loading on the gear sets, and to provide an essentially zero backlash torque connection between the input and output shafts. The friction clutch may be used to provide loading or drag to a gear set at the end of a series of gears.