Swing-door operator system

Details Swing-door operator system Swing-door operator system

1987-04-02

1988-03-01

Kannan, Philip C.

Movable or removable closures

With means to vary opening span or speed during movement

49340, 49345, E05F 1500

Patent

active

047276797

ABSTRACT:
An operator for swing-door employs an electronic control unit for controlling the operation of a motor. The motor is bi-directionally driven at various speeds for opening, closing, braking and maintaining a given position of an associated swing-door. The motor drive shaft is mechanically connected via a timing belt/pulley system with an operator shaft for transmitting torque to a linkage assembly. The linkage assembly is configured to provide a high mechanical advantage at the fully opened and fully closed positions of the associated swing-door.

REFERENCES:
patent: 2820241 (1958-01-01), Schlage
patent: 3114541 (1963-12-01), Coffey
patent: 3874117 (1975-04-01), Boehm
patent: 4658545 (1987-04-01), Ingham et al.
Roto Swing, Inc. brochure, U.S.A. Models 1, and 2, date not known but at least as early as Dec., 1986.

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