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:
May. 02, 1989
Filed:
Jan. 22, 1988
Applicant:
Inventor:
Heinrich Lotz, Wetzlar, DE;
Assignee:
Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH, Asslar, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415 72 ; 415 90 ;
Abstract
A turbo-molecular vacuum pump has a high vacuum side and a fore vacuum side in the form of a molecular pump in which the rotor and stator are frusto-conically shaped. The frusto-conically shaped rotor surface has a helical groove. An axial bearing for the rotor is located at an imaginary apex point of the conically-shaped surface of the rotor. The surface of the bearing containing the imaginary apex point is stationary relative to the stator. The rotor and stator are formed of a high heat conductivity material.
Lotz, Heinrich. (1989). Vacuum pump (U.S. Patent No. 4826394). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4826394
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile