Elevator employing radio frequency identification devices (RFIDs)

US7264090B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Alberto Vecchiotti · Berlin, DE
• Adriana Bacellar · Glastonbury, US
• Luiz Bacellar · Glastonbury, US
• Deborah C. Haas · Coventry, US
• Christian Netter · Vernon, US
• Paul A. Stucky · Stockton, US
• William A. Veronesi · Hartford, US
• Joseph Zacchio · Wethersfield, US
• Bruce Zepke · Glastonbury, US

Key dates

• Filing date: Aug 1, 2002
• Grant date: Sep 4, 2007
• Expiry date: Sep 2, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B13/22
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An elevator safety chain includes a plurality of passive radio frequency identification devices (RFIDs) (15-18, 22, 34-36 and 63), which are associated, respectively, with hoistway door locks, upper hoistway limits, lower hoistway limits, overspeed detection, car door lock, emergency stop switch, and inspection switch. RFlDs may be associated with car the call buttons (34) and/or hall call buttons (14, 19). The RFIDs may have a switch (43, 44) in the frequency-determining circuitry (40, 41) which defeats the RFID's ability to respond, or a switch (48) which alters the responding frequency. The RFIDs may sense safe or unsafe conditions, or call requests, by either the presence of absence, or vice versa, of adjacent magnetic reluctance (51, 62, 71).