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:
Apr. 14, 1998
Filed:
Jul. 30, 1996
Wesley M Dick, Ft. Wayne, IN (US);
Dana Corporation, Toledo, OH (US);
Abstract
A four-wheel motor vehicle drive transfer case with limited differentiation is designed to provide full time four-wheel drive and limit slip or differentiation between the rear and front wheels of a motor vehicle using a mechanical system. The torque transfer case allows differentiation between the front and the rear wheels of the motor vehicle up to a predetermined threshold and thereafter prevents differentiation so that the torque to the axle with the slipping wheels is redirected and transmitted to the axle with the non-slipping wheels. Preferably, an interaxle differential in the torque transfer case locks whenever the rear output shaft attempts to overrun the front output shaft. Also, the torque transfer case preferably allows the front drive shaft to overrun the rear drive shaft by that amount that occurs during 'normal' motor vehicle turning and cornering operations or that amount which may occur due to differences in tire static loaded radius and thereafter locks the interaxle differential to prevent any further differentiation.