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:
Oct. 27, 1992
Filed:
Dec. 28, 1990
Applicant:
Inventors:
Nobuyuki Matsui, Tokyo, JP;
Tatsuyuki Ochi, Tokyo, JP;
Assignee:
Kajima Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60L / ;
U.S. Cl.
CPC ...
104292 ; 104 93 ;
Abstract
A ski chair lift with variable speed drive for each chair. A linear motor is used in lieu of the conventional closed loop tow cable. The stator of the linear motor includes a closed loop I-beam guide rail, electromagnets secured to the top flange of the I-beam, and permanent magnets secured to chair lift carriers which are driven by selective energization of the electromagnets. Failsafe stops and brakes delimit movement of the chairs on the guide rail in the event of a power failure.