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:
Jun. 06, 2017
Filed:
Feb. 06, 2013
Aktiebolaget Skf, Göteborg, SE;
Guillermo Morales Espejel, Ijsselstein, NL;
Kenred Stadler, Schweinfurt, DE;
Victor Brizmer, Nieuwegein, NL;
AKTIEBOLAGET SKF, Gothenburg, SE;
Abstract
A bearing comprising a plurality of rolling elements arranged between an inner and outer raceway thereof. A rolling contact interface is between a first rolling contact surface on at least one rolling element and a second rolling contact surface formed by one of the inner and outer raceways. The first rolling contact surface has a first RMS roughness Rand a first roughness pattern γ, expressed in terms of the Peklenik number γ. The second rolling contact surface has a second RMS roughness Rand a second roughness pattern γ. To minimize micropitting in the bearing, the rolling contact interface has a surface topography wherein (a) the roughness pattern of the first and second rolling contact surfaces are oriented in the direction of rolling, whereby γ≧3.0 and γ≧10.0; and (b) the first and of the second rolling contact surfaces have substantially equal roughness heights, whereby 0.8≦R/R≦1.25.