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:
Dec. 12, 2000
Filed:
May. 12, 1999
Applicant:
Inventors:
Fausto Casaro, Turin, IT;
Raffaella Caretto, Cuceglio, IT;
Assignee:
Varian, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
4174234 ;
Abstract
A vacuum pump (11) comprises a body (1), a rotor member (9) having a plurality of rotor disks (12) coupled to corresponding plurality of stator rings integral to the body (1). The rotor, member has an axial bell-shaped cavity (13). A rotating shaft (15) and an electric motor (7, 8) are disposed within the axial bell-shaped cavity (13). The rotating shaft (15) is supported by rotation supporting means (5a, 5b). The electric motor comprises a stator (7) integral to the body (1) of the vacuum pump (11) and a rotor (8) coupled to the internal surface of the axial bell-shaped cavity (13) of the rotor member (9).