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:
Dec. 25, 2001
Filed:
Dec. 29, 1999
Yoshihiko Hayama, Shizuoka-ken, JP;
Haruo Nagatani, Shizuoka-ken, JP;
NTN Corporation, Osaka-fu, JP;
Abstract
The width (L) in the circumferential direction of the outer surface,of an inner joint member,is L≧3.5 mm. When the assembly angle (&thgr;,) of the torque transmitting ball,is set to 50°, the width (W) in the axial direction is set so that the ratio Rw (=W/PCD,) between the width (W) in the axial direction and the pitch circle diameter (PCD,) of the teeth of an engagement portion,lies within the range of 0.57<Rw≦0.95. Thus, while enabling the assembly of the torque transmitting ball at the assembly angle &thgr;,=50°, cold forging on the inner joint member,is made possible, thereby reducing the processing cost. By reducing the width (W) in the axial direction as much as possible, the weight, dimension, and material cost can be reduced.