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:
Jun. 14, 2005
Filed:
Aug. 29, 2001
Applicants:
Heinrich Engländer, Linnich, DE;
Michael Froitzheim, Dormagen, DE;
Inventors:
Heinrich Engländer, Linnich, DE;
Michael Froitzheim, Dormagen, DE;
Assignee:
Leybold Vakuum GmbH, Cologne, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D001/02 ;
U.S. Cl.
CPC ...
Abstract
A mechanical kinetic vacuum pump with a stator (), a rotor () made from an aluminum or magnesium alloy and a rotor () and a bearing shaft (). The shaft () and the rotor () are connected by a shrink- or screw-fit in a secure permanent connection. The rotor () is made by spray forming. The main alloying component in the aluminum or magnesium alloy is silicon which is present in an amount such that the alloy has an expansion coefficient which essentially corresponds to the expansion coefficient of the shaft material.