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. 22, 2019
Filed:
Dec. 10, 2014
Applicant:
Ntn Corporation, Osaka, JP;
Inventors:
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 27/112 (2006.01); F16D 41/066 (2006.01); F16D 27/06 (2006.01); F16D 41/067 (2006.01); F16D 27/108 (2006.01); F16D 23/12 (2006.01); F16D 41/064 (2006.01);
U.S. Cl.
CPC ...
F16D 41/066 (2013.01); F16D 27/06 (2013.01); F16D 27/108 (2013.01); F16D 41/067 (2013.01); F16D 2023/123 (2013.01); F16D 2041/0646 (2013.01); F16D 2041/0665 (2013.01); F16D 2250/0053 (2013.01); F16D 2300/10 (2013.01);
Abstract
A rotation transmission device includes torque cams provided between opposed surfaces of a flange of a control retainer and a flange of a rotary retainer and configured to convert an axial movement of the control retainer to relative rotational motion between the two retainers. All of the torque cams are circumferentially offset from all of the pillars of the control retainer and all of the pillars of the rotary retainer, and a pair of cam grooves forming each torque cam are heat-treated only at their areas that are brought into contact with a ball of the torque cam, to increase the hardness of these areas, thus improving the durability of the retainers.