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:
Nov. 30, 1993
Filed:
Apr. 16, 1992
Applicant:
Inventors:
Assignee:
Otis Elevator Company, Farmington, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187 56 ; 49120 ;
Abstract
The device is applicable to elevator telescopic two-speed doors, using either two panels with opening towards one side or else using four panels with opening in the center. The rolling device comprises linear ball bearings mounted on a single circular track which together provide a sliding apparatus for the doors. The rolling device further comprises a case for enclosing the sliding apparatus to minimize the intrusion of foreign objects such as dirt and dust.