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:
Jan. 12, 1999
Filed:
Jul. 31, 1997
Yasuhiko Ishikawa, Tochigi-ken, JP;
Abstract
A differential apparatus has a differential casing, a pinion gear, a pair of side gears engaged with the pinion gear, and a cone clutch for limiting a differential movement between the side gears. In this differential apparatus, the cone clutch is constructed by a female side cone portion formed in an inner circumference of the differential casing, and a male side cone portion formed in an outer circumference of the pair of side gears. The female side cone portion is formed in the shape of a tapered face in which a conical generating line is a straight line. The male side cone portion is formed in the shape of a tapered face having a predetermined curvature and a generating line projecting to the female side cone portion. Thus, no sliding portion is offset to a small diameter portion even when thrust applied to the cone clutch is increased, thereby improving durability of the cone clutch.