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:
Jan. 14, 1997
Filed:
May. 16, 1995
Mary-Jo A Liston, Whitmore Lake, MI (US);
NTN Corporation, Osaka, JP;
Abstract
An improved bearing assembly includes a superhard polycrystalline superlattice coating disposed on one or more surfaces. The coating is formed in layers from materials selected from the group consisting of ceramics, metals, alloys, nitrides, borides, carbides and oxides of transition metals, other metals and alloys, carbon, and combinations thereof. The bearing assembly includes a first race having a first load supporting surface and a second race disposed in a spaced relation with said first race, wherein the second race has a second load supporting surface. The bearing assembly further includes a rolling element assembly disposed in communication with the first race and the second race and sized for rolling movement between the first load supporting surface of the first race and the second load supporting surface of the second race. Preferred selections for the coating material are composite coatings including two or more layers of a titanium nitride/niobium nitride period or a titanium nitride/carbon nitride period in a multiple-period arrangement. The bearing assembly having this coating is operable for enhanced durability.