Invention Grant
- Patent Title: Enhanced deceleration propulsion system for elevators
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Application No.: US14760789Application Date: 2013-01-17
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Publication No.: US10087044B2Publication Date: 2018-10-02
- Inventor: Richard N. Fargo
- Applicant: OTIS ELEVATOR COMPANY
- Applicant Address: US CT Farmington
- Assignee: OTIS ELEVATOR COMPANY
- Current Assignee: OTIS ELEVATOR COMPANY
- Current Assignee Address: US CT Farmington
- Agency: Cantor Colburn LLP
- International Application: PCT/US2013/021891 WO 20130117
- International Announcement: WO2014/113006 WO 20140724
- Main IPC: B66B1/06
- IPC: B66B1/06 ; B66B1/28 ; B66B1/30 ; B66B5/02 ; B66B5/22 ; B66B11/04

Abstract:
An elevator system includes a first propulsion system for imparting linear motion to an elevator car. The elevator system includes a controller generating control signals for the first propulsion system. The elevator system includes a brake for holding the elevator car. The elevator system includes an energy storage unit. The elevator system includes a second propulsion system. The controller is configured to at least one of (i) access the energy storage unit to power at least one of the first propulsion system and second propulsion system upon a fault during upward travel of the elevator car (ii) power the second propulsion system upon a fault in the first propulsion system during upward travel of the elevator car and (iii) delay applying the brake until the elevator car speed is less than a threshold upon a fault during upward travel of the elevator car.
Public/Granted literature
- US20150353321A1 ENHANCED DECELERATION PROPULSION SYSTEM FOR ELEVATORS Public/Granted day:2015-12-10
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