Safety device of elevator and its operation testing method

Details Safety device of elevator and its operation testing method Safety device of elevator and its operation testing method

2004-02-26

2009-08-18

Ro, Bentsu (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

C187S393000

Reexamination Certificate

active

07575102

ABSTRACT:
In an elevator safety device, a brake device puts brakes to brake a car through an operation of a safety relay main contact provided to a safety circuit. When the car stops during normal operations, a safety relay instruction signal for operating the relay main contact to such a direction that the brake device puts brakes is generated from a detection circuit. Then, the detection circuit detects whether or not the safety relay main contact is operated in accordance with the safety relay instruction signal.

REFERENCES:
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patent: 4380049 (1983-04-01), Makinen
patent: 5407028 (1995-04-01), Jamieson et al.
patent: 5648644 (1997-07-01), Nagel
patent: 6056088 (2000-05-01), Gerstenkorn
patent: 6173813 (2001-01-01), Rebillard et al.
patent: 6446760 (2002-09-01), Lisi
patent: 2005/0269163 (2005-12-01), Angst
patent: 55-135078 (1980-10-01), None
patent: 2-152886 (1990-06-01), None
patent: 7-117945 (1995-05-01), None
patent: 2001-106446 (2001-04-01), None
JP1980135078ATRANS.pdf: English translation of Japanese publication JP 55-135078.

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