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:
Mar. 03, 2009
Filed:
Feb. 07, 2003
Richard Fargo, Plainville, CT (US);
Helmut Meyer, Buckeberg, DE;
Frank Sansevero, Glastonbury, CT (US);
Markus Hame, Stadthagen, DE;
Hermann Wiese, Buckeburg, DE;
Richard Fargo, Plainville, CT (US);
Helmut Meyer, Buckeberg, DE;
Frank Sansevero, Glastonbury, CT (US);
Markus Hame, Stadthagen, DE;
Hermann Wiese, Buckeburg, DE;
Otis Elevator Company, Farmington, CT (US);
Abstract
An escalator drive assembly () includes a sensor that facilitates detecting when the normal drive assembly operation is interrupted, such that a brake should be activated. In one example, a sensor member () in the form of a flange () is associated with a drive pulley () and normally rotates in unison with the drive pulley. When there is a failure in the normal operation of the drive mechanism, however, there is a resulting relative movement between the sensor member () and the drive pulley (). Such relative motion preferably activates a switch () that provides a signal that indicates a failure of the normal operation of the drive mechanism (). Another example sensor includes a sensor member () that engages a drive belt (). If the belt () breaks, the sensor member () moves to provide an indication of the broken belt condition. Various braking application modes are possible using the invention.