Elevator door brake, brake, lock, and hold-open

US5880414A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

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

Key dates

• Filing date: Dec 31, 1997
• Grant date: Mar 9, 1999
• Expiry date: Dec 31, 2017

Classification

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

Abstract

When an elevator is running, the car door 27 is locked in the closed position by a brake shoe 12 which engages the edge of the door hanger 24 in response to a push-type solenoid 19 overcoming the force of a spring. When the door is not closed, a friction brake pad 11 contacts the door hanger surface to hold the door open for passenger boarding or to stop the door in case of failure of door operator power while the door is in motion.