Car operated safety gate for horizontally transferrable elevator cab

US5695024A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Samuel C. Wan · Simsbury, US
• Frederick H. Barker · Bristol, US
• Bruce A. Powell · Canton, US
• Gilbert W. Wierschke · Littleton, US
• Paul Bennett · Waterbury, US
• Anthony Cooney · Unionville, US
• Richard C. McCarthy · Simsbury, US
• Joseph Bittar · Avon, US

Key dates

• Filing date: Nov 29, 1995
• Grant date: Dec 9, 1997
• Expiry date: Nov 29, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B17/36
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A safety gate (24) is slidable vertically from an upper position at an elevator cab landing (22) where it obstructs movement of the elevator cab (20) into a hoistway, and a lower position that permits cab travel between a car frame (29) and the landing. An actuator (42) normally urges the gate upwardly; the actuator is moved by a cam assembly (36) on an approaching elevator car frame so as to slide the gate (24) downward, out of the way of cab motion.