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:
Sep. 09, 2008
Filed:
Mar. 16, 2004
Applicants:
Urs Ammon, Ebikon, CH;
Andrzej Cholinski, Ebikon, CH;
Christian Lüthi, Lucerne, CH;
Inventors:
Assignee:
Inventio AG, Hergiswil NW, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B 1/06 (2006.01); B66B 11/08 (2006.01); H02P 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An elevator drive unit including a traction sheave supported by a shaft rotatably supported by a pair of bearings. Mounted on opposite free ends of the shaft are rotors of a pair of electric motors. Cage-housings on a pair of spaced bearing end-plates retain the stators of the motors. A plurality of frequency converters operating in a master/slave mode to supply electrical power to the motors.