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:
Jul. 13, 1999
Filed:
Sep. 09, 1997
Applicant:
Inventors:
Alfonso Garrido, Paris, FR;
Jose Sevilleja, Madrid, ES;
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187264 ;
Abstract
A traction drive elevator system includes a device to enhance the traction forces between the ropes as the traction sheave. As a result, the traction force is the sum of the traction force caused by the tension in the ropes and the traction force caused by the traction enhancement device.