Linear induction motor door drive assembly for elevators

US5612518A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

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

Key dates

• Filing date: Apr 8, 1994
• Grant date: Mar 18, 1997
• Expiry date: Apr 8, 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 of an elevator are driven through their opening and closing cycles by one or more linear induction motor (LIM) assemblies in which the primary winding component of the LIM assembly is secured to the elevator cab structure and the LIM secondary component is secured to the cab door. If the cab has two oppositely moving doors, there will preferably be two separate motor drives, one for each door. In one embodiment, the motor components are arranged so as to create a normal force which is horizontal; and in another embodiment, the normal force created is vertical. A primary motor mount bracket is used which secures the primary winding component to the overhead component of the cab structure.