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:
Feb. 17, 2015
Filed:
Nov. 14, 2011
Masato Kobayashi, Fujisawa, JP;
Tomoharu Saito, Fujisawa, JP;
Shinji Fujita, Fujisawa, JP;
Takanori Tanaka, Fujisawa, JP;
Masato Kobayashi, Fujisawa, JP;
Tomoharu Saito, Fujisawa, JP;
Shinji Fujita, Fujisawa, JP;
Takanori Tanaka, Fujisawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
In forming an actuator, a large end surface of a tapered roller of a tapered roller bearing is shot with minute particles of silicon carbide having a diameter of 0.5 to 100 μm and having an angle formed by crushing, and such a surface is scraped concavely at a diameter within a range from 0.5 to 100 μm to form a large number of concavities having a depth of equal to or greater than 1 μm at a pitch of equal to or less than 200 μm. The concavities are non-continuous and isolated from each other, and serve as a lubricant puddle. The concavities are formed by scraping and not by plastic deformation, and thus the surface is not hardened.