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:
Jan. 02, 2007
Filed:
Feb. 24, 2003
Steven P. Reynolds, Toronto, CA;
Richard W. Lajeunesse, Brampton, CA;
Zygmunt Dziwak, Mississauga, CA;
David E. Kairis, Brampton, CA;
Steven P. Reynolds, Toronto, CA;
Richard W. Lajeunesse, Brampton, CA;
Zygmunt Dziwak, Mississauga, CA;
David E. Kairis, Brampton, CA;
The Peelle Company Ltd., Brampton, CA;
Abstract
A control system for a motorized freight elevator landing door in which all of the doors in a single line of a hoistway are controlled with one set of proximity sensors carried on the elevator car. The sensors signal a controller that operates electric motors for opening and closing the landing door where the car has stopped. The door operating motors are two speed units and the sensors and controller are arranged to operate the motors at high speed during most of the travel in opening or closing movement and at reduced speed at the end of movement. The controller applies power to the motor for a short period after the door is fully closed or open to stall the motors and thereby dampen any rebound motion.