Elevator safety system and method

US8356697B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• John J. Kriss · East Hampton, US
• Loren Fanion · Forestville, US
• Fred R. Spielman · Somers, US
• Daniel Greer · Bristol, US

Key dates

• Filing date: Oct 25, 2005
• Grant date: Jan 22, 2013
• Expiry date: May 24, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B5/02
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An elevator safety system (10) includes a limit switch (32) coupled to a first elevator car (14) and an actuator plate (30) coupled to a governor rope (24) of a second elevator car (16). The actuator plate trips (30) the limit switch (32) when a distance between the first elevator car (14) and the second elevator car (16) goes below a safety threshold distance to stop the first and second elevator cars (14, 16).