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:
Oct. 22, 2013
Filed:
Sep. 19, 2008
Applicant:
Heinrich Engländer, Linnich, DE;
Inventor:
Heinrich Engländer, Linnich, DE;
Assignee:
Oerlikon Leybold Vacuum GmbH, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 19/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A multi-stage pump rotor () for a turbomolecular pump has at least two separate blade disk rings (), each having a motor ring () and at least one blade disk (). A cylindrical reinforcement pipe (), which surrounds the rotor rings () of the blade disk rings () on the outside without clearance, is provided between the blade disks () of adjacent blade disk rings (). The reinforcement pipe () absorbs a large part of the tangential forces occurring during operation such that the pump rotor () has improved stability at high rotor speeds.