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:
Nov. 14, 2017
Filed:
Jun. 05, 2014
Applicant:
Ntn Corporation, Osaka, JP;
Inventor:
Takashi Ueno, Iwata, JP;
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 33/62 (2006.01); C22C 38/00 (2006.01); C22C 38/34 (2006.01); C22C 38/44 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/18 (2006.01); C22C 38/40 (2006.01); C21D 9/36 (2006.01); C21D 9/40 (2006.01); C23C 8/32 (2006.01); F16C 19/36 (2006.01); C22C 38/12 (2006.01); F16C 19/54 (2006.01);
U.S. Cl.
CPC ...
F16C 33/62 (2013.01); C21D 9/36 (2013.01); C21D 9/40 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/12 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); C22C 38/40 (2013.01); C22C 38/44 (2013.01); C23C 8/32 (2013.01); F16C 19/364 (2013.01); F16C 19/547 (2013.01); F16C 2204/64 (2013.01); F16C 2204/66 (2013.01); F16C 2204/74 (2013.01);
Abstract
A tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers, and a holder. A nitrogen concentration in a surface layer portion under a contact surface is 0.3 mass % or more. The holder includes a small annular portion, a large annular portion, and a plurality of column portions. A pocket has a trapezoidal shape in which a portion housing a small diameter side of the tapered roller is located on a reduced width side while a portion housing a large diameter side of the tapered roller is located on an increased width side. Each of the column portions on the reduced width side of the pocket is provided with a cutout.