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:
Aug. 29, 1989
Filed:
Jun. 14, 1988
Applicant:
Inventors:
Yves Laumond, Andelnans, FR;
Jean-Louis Sabrie, Cravanche, FR;
Assignee:
Societe Anonyme dite : ALSTHOM, Paris Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 54 ; 310 10 ; 310 90 ; 310254 ; 310261 ; 277 53 ;
Abstract
A synchronous machine having a rotor which is fixed to a shaft supported in bearings, said machine having its rotor (1) and stator (2) windings cooled by very low temperature helium, with each of the windings and the gap (4) therebetween being in a vacuum enclosures. The said rotor and stator windings and the said gap are disposed inside a common enclosure (13) connected to a common vacuum source (17), and said gap is separated from the bearings (14) of the rotor shaft (3) by vacuum-resisting oil seals (15) and by cryogenic traps (16).