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:
Oct. 05, 2010
Filed:
Mar. 16, 2006
Gary L. Doll, Canton, OH (US);
Ryan D. Evans, Canton, OH (US);
Stephen P. Johnson, White River Junction, VT (US);
Gary L. Doll, Canton, OH (US);
Ryan D. Evans, Canton, OH (US);
Stephen P. Johnson, White River Junction, VT (US);
The Timken Company, Canton, OH (US);
Abstract
A method of enhancing the operating life of roller bearings assemblies (B) subject to oil-out conditions is disclosed. The method comprises applying a tribological metal carbide reinforced amorphous hydrocarbon coating layer () over either the sliding surfaces (SS) or the rolling surfaces (RS) of the bearing assembly rolling elements (RE), but is preferably applied at least to the sliding surfaces of the rolling element. The coating has a thickness determined according to the equation: Formula (I), where d=coating thickness P=is the ratio of force applied to the rollers/contact area; n=the number of rollers; (t−t)=the desired operating time after oil-out condition starts; and K' is the Archard constant.