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:
Apr. 07, 2015
Filed:
Nov. 17, 2010
Hironori Mizuki, Fujisawa, JP;
Yasuhiro Ishimori, Fujisawa, JP;
Masahiro Kita, Fujisawa, JP;
Hiroki Maejima, Fujisawa, JP;
Kinji Yukawa, Fujisawa, JP;
Tomoharu Saito, Fujisawa, JP;
Yingyi Wen, Fujisawa, JP;
Hironori Mizuki, Fujisawa, JP;
Yasuhiro Ishimori, Fujisawa, JP;
Masahiro Kita, Fujisawa, JP;
Hiroki Maejima, Fujisawa, JP;
Kinji Yukawa, Fujisawa, JP;
Tomoharu Saito, Fujisawa, JP;
Yingyi Wen, Fujisawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A tapered roller bearing improves durability during a state of insufficient lubrication by sufficiently lengthening the time until rotation becomes impossible due to seizure. Oil retaining concave sections, recessed outward in the radial direction, are formed in portions on the inner circumferential surface of a large-diameter rim section of the retainer whose phase in the circumferential direction coincides with the pockets. A portion of the bottom surface of each of the oil retaining concave sections, open to the inside surface of the pocket, face a concave section formed in an end surface on the large-diameter side of tapered roller that is held inside the pocket. When lubrication becomes insufficient, oil remaining in the concave sections is effectively used for lubricating areas of sliding contact between the end surfaces on the large-diameter side and the inside surface in the axial direction of a large-diameter side flange section.