Method and system for maintaining distance between elevator cars in an elevator system with multiple cars in a single hoistway

US8136635B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Theresa M. Christy · Town of West Hartford, US
• Randall Keith Roberts · Amston, US
• Harold Terry · 3a Avenida SO, US
• Mauro J. Atalla · South Glastonbury, US
• Arthur Hsu · South Glastonbury, US
• CheongSik Shin · Seoul, KR
• Hansoo Shim · Uiwang-si, KR

Key dates

• Filing date: Dec 22, 2006
• Grant date: Mar 20, 2012
• Expiry date: Feb 2, 2028

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B5/0031
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Controlling the movement of elevator cars (22, 24) within a single hoistway (26) prevents the cars from becoming too close while servicing assigned stops. Example control techniques include controlling door operation of at least one of the elevator cars (22, 24) to effectively slow down a follower car or speed up a leader car for increasing a distance between the cars in an area within the hoistway (26) where the cars would otherwise be too close to each other.