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:
Jun. 21, 2022
Filed:
Sep. 14, 2017
Applicant:
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Inventors:
Yasushi Akita, Isehara, JP;
Kazuhisa Yokoyama, Yoshitomi-machi, JP;
Kenichiro Ishikura, Atsugi, JP;
Tatsuya Shimoda, Novi, MI (US);
Assignee:
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 3/06 (2006.01); F16C 3/03 (2006.01); F16D 1/10 (2006.01);
U.S. Cl.
CPC ...
F16D 3/06 (2013.01); F16C 3/03 (2013.01); F16D 1/10 (2013.01); F16C 2202/02 (2013.01); F16C 2220/60 (2013.01); F16D 2250/003 (2013.01); F16D 2250/0084 (2013.01); Y10T 403/7035 (2015.01);
Abstract
A low surface-roughness part is formed at a first tapered part, as a result, the roughness of an opening-edge of a groove part of an internal spline part that opens at the first tapered part is reduced, and surface pressure applied by the opening edge to a tooth of an external spline part can be reduced. As a result, the opening edge of the groove part of the internal spline part can be kept from digging into the tooth, and variation, between products, in the insertion load of a second shaft part can be suppressed.