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. 06, 2006
Filed:
Oct. 30, 2002
Applicants:
Manfred Behling, Köln, DE;
Hartmut Kriehn, Köln, DE;
Klaus Rofall, Rösrath, DE;
Ralf Steffens, Steinen, DE;
Inventors:
Manfred Behling, Köln, DE;
Hartmut Kriehn, Köln, DE;
Klaus Rofall, Rösrath, DE;
Ralf Steffens, Steinen, DE;
Assignee:
Leybold Vakuum GmbH, Cologne, DE;
Primary Examiner:
Int. Cl.
CPC ...
F03C 2/00 (2006.01); F04C 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A screw-type vacuum pump () includes a pump housing () with rotors (). A liquid cooling system cools the rotors and a drive motor (). In order to improve the cooling of said pump, an external air-flow impelled cooling system is also provided for the pump housing ().