Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes control for power source of drive-means
Reexamination Certificate
2003-10-07
2009-08-18
Ro, Bentsu (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes control for power source of drive-means
C187S247000, C187S287000, C187S288000, C187S372000, C187S373000, C187S375000, C187S376000
Reexamination Certificate
active
07575099
ABSTRACT:
A brake mechanism (10) for an elevator (2) is activated in response to an electronic control signal to prevent movement of an elevator car (16) under predetermined conditions. The brake mechanism is preferably a safety mechanism (10) and does not require a governor sheave, a governor rope, or a tension sheave. The safety mechanism in one disclosed example utilizes a solenoid actuator (22b) and an electric motor (40) and gear box assembly (42) to move safety wedges (18) into engagement with a guide rail (20) to stop the elevator car (16). The safety wedges (18) are held in a non-deployed position during normal elevator operation. If there is a power loss or if elevator car speed exceeds a predetermined threshold, an electronic control signal activates the safety mechanism (10) causing the solenoid to release, which causes the safety wedges (18) move in a direction opposite to that of a safety housing (12) mounted for movement with the elevator car (16). Angled surfaces of the safety housing (12) force the safety wedges (18) into engagement with the guide rail (20). The safety mechanism (10) can be selectively reset from a remote location.
REFERENCES:
patent: 3762512 (1973-10-01), McIntyre
patent: 4518153 (1985-05-01), West et al.
patent: 5096020 (1992-03-01), Korhonen
patent: 5159995 (1992-11-01), Sissala et al.
patent: 5234079 (1993-08-01), Nomura
patent: 5353895 (1994-10-01), Camack
patent: 5366045 (1994-11-01), Liston
patent: 5386889 (1995-02-01), Pipes
patent: 5513760 (1996-05-01), Luebke
patent: 5819879 (1998-10-01), Lang et al.
patent: 6161653 (2000-12-01), Skalski et al.
patent: 6202795 (2001-03-01), Bluteau
patent: 6269910 (2001-08-01), Fargo
patent: 6318507 (2001-11-01), Jin
patent: 6371261 (2002-04-01), Thompson et al.
patent: 6719101 (2004-04-01), Hugel
patent: 2003/0085078 (2003-05-01), Simmonds et al.
International Search Report dated Oct. 19, 2004.
Written Opinion from the International Preliminary Examining Authority dated Aug. 25, 2005.
Notification of Transmittal of IPER from the Int'l Preliminary Examining Authority, Feb. 9, 2006.
Bacellar Adriana
Cooney Anthony
Miller Robin Mihekun
Oh Jae-Hyuk
Peng Pei-Yuan
Carlson & Gaskey & Olds
Chan Kawing
Otis Elevator Company
Ro Bentsu
LandOfFree
Remotely resettable ropeless emergency stopping device for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remotely resettable ropeless emergency stopping device for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remotely resettable ropeless emergency stopping device for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4095466