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:
Dec. 19, 2023
Filed:
Mar. 19, 2020
Nsk Ltd., Tokyo, JP;
NSK LTD., Tokyo, JP;
Abstract
In a tapered roller bearing, the surface roughness of at least a rolling surface and a large diameter-side end surface of a tapered roller is 0.02 to 0.17 μm in protruding mountain portion height Rpk, 0.12 to 0.21 μm in core portion level difference Rk, and 0.07 to 0.43 μm in protruding valley portion height Rvk and the average recessed portion area in the fine irregularities on the surface of the tapered roller is 5 μmor less. As a result, oil film formability can be improved under dilute lubrication and a decline in lubricating oil viscosity and surface damage at a rolling contact part and an increase in friction at a sliding contact part can be suppressed at the same time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile