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:
Mar. 24, 2015
Filed:
Jul. 23, 2012
Nobuyuki Hagiwara, Gunma, JP;
Kaname Yasuda, Gunma, JP;
Minao Umeda, Gunma, JP;
Kazuho Chikaraishi, Gunma, JP;
Tadashi Hibino, Gunma, JP;
Hiroki Mizuno, Gunma, JP;
Masahiro Inoue, Gunma, JP;
Masaharu Igarashi, Gunma, JP;
Osamu Tatewaki, Gunma, JP;
Kiyoshi Sadakata, Gunma, JP;
Nobuyuki Hagiwara, Gunma, JP;
Kaname Yasuda, Gunma, JP;
Minao Umeda, Gunma, JP;
Kazuho Chikaraishi, Gunma, JP;
Tadashi Hibino, Gunma, JP;
Hiroki Mizuno, Gunma, JP;
Masahiro Inoue, Gunma, JP;
Masaharu Igarashi, Gunma, JP;
Osamu Tatewaki, Gunma, JP;
Kiyoshi Sadakata, Gunma, JP;
NSK Ltd., Tokyo, JP;
Abstract
Structure of a cross universal joint is achieved in which the fact that an excessive torque was applied to a universal joint due to a collision accident or mishandling can be easily determined afterwards. Protrusions, which are straight lines as seen from the outside surface sides of linking arm sectionsof a yoke, are formed on the outside surfaces of the linking arm sections. When an excessive torque acts and the linking arm sectionsare plastically deformed, the protrusionschange from a straight line to a non-straight line. From this change it is possible to easily confirm that an excessive torque has been applied to a cross universal joint that includes this yoke. Moreover, when the space between the inside surfaces of the linking arm sectionsis taken to be D, and the length in the axial direction of the linking arm sectionsis taken to be L, the dimensions of the parts of the yokeare regulated so that the relation 3<L/D≦4 is satisfied.