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:
May. 08, 2007
Filed:
Oct. 29, 2003
Gerhard Kreiselmeier, Dittelbrunn, DE;
Wilhelm Sebald, Bad Königshofen, DE;
Franz Josef Ebert, Hammelburg, DE;
Gerhard Kreiselmeier, Dittelbrunn, DE;
Wilhelm Sebald, Bad Königshofen, DE;
Franz Josef Ebert, Hammelburg, DE;
Fag Kugelfischer AG, , DE;
Abstract
A single-row or multi-row rolling bearing comprising thin-walled bearing races which are made of a martensitic, through hardened steel and have the following characteristics: a surface hardness of ≧613 HV (56 HRC) in the area of the bearing face; a core hardness of ≧285 HV (28 HRC); a difference of ≧150 HV (9 HRc) between the surface hardness and the core hardness. The core hardness is reached at a depth ranging between 8 percent of the diameter of the rolling elements and 90 percent of the wall thickness on the bottom of the track. There is a ratio of ≧20 between the diameter of a pitch circle Tand the diameter of a rolling element D.