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:
May. 03, 1994
Filed:
Sep. 15, 1992
James A Rivera, Bristol, CT (US);
Dat Nguyen, New Britain, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
A power switch assembly is operably connected to the combplate of an escalator for selectively shutting off the escalator in the event of entrapment of some object between the steps and combplate. When an object becomes wedged between the steps and combplate, the latter will be lifted or pushed upwardly away from the steps. The upward movement of the combplate operates a power interruption switch to stop further movement of the steps and handrail. The combplate is supported on the truss by spring assemblies which serve to effectively lower the weight of the combplate so that upward movement of the latter is more readily accomplished. The assembly can be retrofitted onto older existing escalators with heavier combplates than are found in newer equipment.