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
2005-11-04
2009-12-15
Salata, Jonathan (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
C187S224000, C182S148000
Reexamination Certificate
active
07631730
ABSTRACT:
A powered controlled acceleration suspension work platform hoist system for raising and lowering a work platform at a predetermined acceleration. The system incorporates several hoists attached to the work platform and in electrical communication with the motor control system. The motor control system is attached to the work platform and is in electrical communication with a constant frequency input power source and the hoist motors. The motor control system controls the acceleration of the work platform as it is raised and lowered by controlling the hoist motors. The controlled acceleration hoist system also includes a platform control system attached to the work platform that is in electrical communication with the motor control system and the hoist motors. Acceleration control is achieved by converting the constant frequency input power to a variable frequency power supply. This may be accomplished through the use of a variable frequency drive(s).
REFERENCES:
patent: 3817346 (1974-06-01), Wehmeyer
patent: RE28455 (1975-07-01), Denier et al.
patent: 4462484 (1984-07-01), Crudele
patent: 4821842 (1989-04-01), Cavalieri
patent: 5167401 (1992-12-01), James et al.
patent: 6247680 (2001-06-01), Cohen
patent: 6405114 (2002-06-01), Priestley et al.
patent: 6598859 (2003-07-01), Kureck et al.
patent: 6848675 (2005-02-01), Davis et al.
patent: 2008/0087497 (2008-04-01), Boswell et al.
patent: 2008/0174955 (2008-07-01), Eddy et al.
Anasis George M.
DeSmedt Jean-Francois
Eddy Robert E.
Ingram Gary E.
Dawsey David J.
Gallagher Michael J.
Gallagher & Dawsey Co. LPA
Salata Jonathan
Sky Climber LLC
LandOfFree
Powered controlled acceleration suspension work platform... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Powered controlled acceleration suspension work platform..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Powered controlled acceleration suspension work platform... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4079183