Elevator – industrial lift truck – or stationary lift for vehicle – With barrier for regulating access to load support – Includes motor or motor driven linkage for shifting barrier
Patent
1994-04-07
1997-09-16
Nappi, Robert
Elevator, industrial lift truck, or stationary lift for vehicle
With barrier for regulating access to load support
Includes motor or motor driven linkage for shifting barrier
187315, 310 13, 49118, B66B 1314
Patent
active
056683553
ABSTRACT:
The door or doors on an elevator cab are driven during their opening and closing cycles by a linear induction motor drive system. The primary of the linear motor is fixed to the cab assembly, and the secondary is mounted on the door hanger panel and moves with the door. In order for the secondary to maintain a proper spacing relative to the primary, a flexible connection is provided between the secondary and the remainder of the door. In this way, shifting of the door during its opening and closing movements will not cause misalignment of the secondary with respect to the primary.
REFERENCES:
patent: 1881016 (1932-10-01), Rose
patent: 4188552 (1980-02-01), Brimer
patent: 4450493 (1984-05-01), Watrous
patent: 4503637 (1985-03-01), Parente
patent: 4876765 (1989-10-01), Karita
patent: 5172518 (1992-12-01), Yoshino
patent: 5271181 (1993-12-01), Pietro
patent: 5373120 (1994-12-01), Barrett et al.
Ahigian Edward E.
Barrett David W.
He Thomas
Jaminet Jerome F.
Kowalczyk Thomas M.
Nappi Robert
Otis Elevator Company
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