Safety control device for an elevator apparatus and operating method thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 30, 2013
Grant Date -
Feb 17, 2011
app pub date -
Jun 27, 2008
filing date -
Jun 27, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An elevator apparatus includes a safety circuit section including a plurality of abnormality detection units, a safety control device, failure detection unit, and circuit changeover unit. The safety control device controls electric power supply to a driving device and a brake device in accordance with a content of an abnormality detected by the abnormality detection units. The failure detection unit detects a failure of the safety control device. When the failure of the safety control device is detected, the circuit changeover unit forms a failure-time circuit in which the electric power supply to the driving device and the brake device is interrupted directly by the abnormality detection unit.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully