Elevator hoistway door bolt lock

US5669465A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Richard E. Kulak · Bristol, US
• Thomas M. McHugh · Farmington, US
• Edward E. Ahigian · Arlington Heights, US
• Jerome F. Jaminet · South Windsor, US
• Thomas He · Unionville, US
• Richard E. Peruggi · Glastonbury, US
• Thomas M. Kowalczyk · Farmington, US
• David W. Barrett · Hartland, US

Key dates

• Filing date: Jul 28, 1995
• Grant date: Sep 23, 1997
• Expiry date: Jul 28, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B13/185
• WIPO field: Handling
• WIPO sector: Mechanical engineering

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.