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. 31, 2015
Filed:
Mar. 03, 2010
Markus Henry, Cologne, DE;
Heinz Englaender, Linnich, DE;
Christian Beyer, Cologne, DE;
Oerlikon Leybold Vacuum GmbH, Cologne, DE;
Abstract
A multi-inlet vacuum pump has a first pump device () and a second pump device (). The first pump device () includes a first rotor element () having a plurality of first rotor discs () arranged consecutively in the delivery direction (). The second rotor disc includes a second rotor element () having a plurality of second rotor discs () arranged consecutively in the delivery direction (). A first fluid flow () is suctioned through a main inlet () by the first pump device () and delivered in the direction of the second pump device (). A second fluid flow () is suctioned through an intermediate inlet () by the second pump device and delivered in the direction of a pump outlet. The diameter of the last rotor disc () of the first pump () substantially corresponds to the diameter of the first rotor () of the second pump device ().