Invention Grant
- Patent Title: Elevator device having the plurality of hoisting machines
- Patent Title (中): 具有多台曳引机的电梯装置
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Application No.: US12812609Application Date: 2008-04-15
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Publication No.: US08365872B2Publication Date: 2013-02-05
- Inventor: Takaharu Ueda
- Applicant: Takaharu Ueda
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/JP2008/057325 WO 20080415
- International Announcement: WO2009/128139 WO 20091022
- Main IPC: B66B1/34
- IPC: B66B1/34

Abstract:
In an elevator device, a car is raised and lowered by a plurality of hoisting machines respectively including hoisting machine brakes. Each of the hoisting machine brakes has a braking force large enough to stop the car by itself. Each of a plurality of brake control sections respectively for controlling the corresponding hoisting machine brakes includes a plurality of calculation sections. The calculation sections can detect a failure of the calculation sections by comparing own results of calculations and cause a corresponding one of the hoisting machine brakes to perform a braking operation upon detection of the failure of the calculation sections.
Public/Granted literature
- US20100282545A1 ELEVATOR DEVICE Public/Granted day:2010-11-11
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