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:
Aug. 28, 2001
Filed:
Sep. 21, 1998
Keisuke Sone, Hamamatsu, JP;
Akira Wakita, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
A hub unit includes an axle hub, a brake rotor, an axle bearing, and a constant velocity universal joint and transmits power of an engine of an automobile to drive wheels via a drive shaft. The axle hub takes the role as a bearing inner ring of the axle bearing and an outer joint member of the constant velocity universal joint. The axle hub, brake rotor, axel bearing, and constant velocity universal joint are compactly assembled. The ratio r2 (=D,/PCD,) between the outer diameter D,of the axle hub (outer joint member) and the pitch circle diameter (PCD,) of the tooth profile (serrations or splines) of the fitting portion of the inner joint member is set in a range of 2.5≦r2<3.2.