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:
Dec. 03, 1991
Filed:
Apr. 22, 1991
Applicant:
Inventors:
Assignee:
Leybold Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F16C / ;
U.S. Cl.
CPC ...
4174234 ; 41742313 ; 384492 ; 384518 ; 384907 ;
Abstract
A vacuum pump includes a rotor and at least one bearing that is supplied with a lubricant and that is situated, during operation, in a negative-pressure environment. In order to extend the useful life of the bearing, it is proposed that the bearing is formed from a ceramic material.