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:
Mar. 07, 2006
Filed:
Dec. 19, 2002
Applicants:
Günter Herles, Dittelbrunn, DE;
Dieter Göbel, Thundorf, DE;
Richard Mützel, Thundorf, DE;
Inventors:
Assignee:
Fag Kugelfischer AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 33/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ball-bearing unit for a bearing of a deep-drilling apparatus having bearing races made from steel with balls disposed therebetween. Contaminated drilling medium passes into the space between the bearing races. Load-bearing balls made from ceramic alternate with separating balls of smaller diameter made from steel between the bearing races to extend significantly the service life of the ball-bearing unit.