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:
Feb. 27, 1996
Filed:
Apr. 07, 1994
Thomas M Kowalczyk, Farmington, CT (US);
Jerome F Jaminet, South Windsor, CT (US);
Thomas M McHugh, Farmington, CT (US);
Edward E Ahigian, West Hartford, CT (US);
Thomas He, Unionville, CT (US);
Richard E Peruggi, Glastonbury, CT (US);
Richard E Kulak, Bristol, CT (US);
David W Barrett, East Hartland, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
A reciprocating elevator cab door is mounted on a guide track assembly which is fixed to the cab. The cab door is provided with guide rollers which travel along the upper surface of the guide track as the door opens and closes. The door is also provided with at least one upthrust roller which engages the lower surface of the guide track so as to stabilize the door against rocking motion as it moves back and forth over the guide track. The upthrust roller is preferably spring biased against the guide track. Use of the upthrust roller allows greater flexibility of door drive systems.