Invention Grant
- Patent Title: Elevator brake control including a solid state switch in series with a relay switch
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Application No.: US14347652Application Date: 2011-10-06
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Publication No.: US09617117B2Publication Date: 2017-04-11
- Inventor: Kyle W. Rogers
- Applicant: Kyle W. Rogers
- Applicant Address: US CT Farmington
- Assignee: OTIS ELEVATOR COMPANY
- Current Assignee: OTIS ELEVATOR COMPANY
- Current Assignee Address: US CT Farmington
- Agency: Carlson, Gaskey & Olds
- International Application: PCT/US2011/055042 WO 20111006
- International Announcement: WO2013/052051 WO 20130411
- Main IPC: B66B1/34
- IPC: B66B1/34 ; B66B5/00 ; B66B1/32 ; B66B5/18 ; B66B13/22

Abstract:
An exemplary elevator brake control device includes a relay switch that is associated with a safety chain configured to monitor at least one condition of a selected elevator system component. The relay switch is selectively closed to allow power supply to an electrically activated elevator brake component responsive to the monitored condition having a first status. The relay switch is selectively opened to prevent power supply to the brake component responsive to the monitored condition having a second, different status. A solid state switch is in series with the relay switch between the relay switch and the brake component. A driver selectively controls the solid state switch to selectively allow power to be supplied to the brake component only if the relay switch is closed and the monitored condition has the first status.
Public/Granted literature
- US20140231181A1 ELEVATOR BRAKE CONTROL Public/Granted day:2014-08-21
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