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:
Sep. 23, 1997
Filed:
Jul. 28, 1995
Richard E Kulak, Bristol, CT (US);
Thomas M McHugh, Farmington, CT (US);
Edward E Ahigian, Chicago, IL (US);
Jerome F Jaminet, South Windsor, CT (US);
Thomas He, Unionville, CT (US);
Richard E Peruggi, Glastonbury, CT (US);
Thomas M Kowalczyk, Farmington, CT (US);
David W Barrett, East Hartland, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
An elevator hoistway door lock assembly comprises first and second lock subassemblies. Each lock subassembly has a rotatable latch mounted on a respective door hanger, a first and second catches are mounted on the hoistway for engagement with each respective latch, a first and second cam followers are fastened to the respective latches and movable between a first position in which each latch engages the respective catch in a locked position and a second position in which each latch is disengaged from the respective catch in an unlocked position so that the hoistway doors may be moved to an open position and each pair of electrical contacts for indicating a locked condition of the respective door when the contacts are electrically connected.