Elevator cab door drive system

US5668355A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

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

Key dates

• Filing date: Apr 7, 1994
• Grant date: Sep 16, 1997
• Expiry date: Apr 7, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B13/08
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

The door or doors on an elevator cab are driven during their opening and closing cycles by a linear induction motor drive system. The primary of the linear motor is fixed to the cab assembly, and the secondary is mounted on the door hanger panel and moves with the door. In order for the secondary to maintain a proper spacing relative to the primary, a flexible connection is provided between the secondary and the remainder of the door. In this way, shifting of the door during its opening and closing movements will not cause misalignment of the secondary with respect to the primary.