Swing door operating system

Details Swing door operating system Swing door operating system

2006-05-25

2009-10-13

Mitchell, Katherine W (Department: 3634)

Movable or removable closures

With operator for movably mounted closure

Closure-mounted drive

C049S025000

Reexamination Certificate

active

07600345

ABSTRACT:
A door actuating system has a fractional horsepower motor mounted on the door adjacent its free edge, driving a clutch connected to a duplex capstan pulley that is wrapped by two tensioned flexible static lines, for opening/closing movement ‘along the line’. The motor also drives a gear that engages a rack projecting from the door frame, to displace the door relative to its frame. Rotation of the gear is read by a rotary encoder, which feeds a microprocessor, to continuously monitor the location, speed and direction of motion of the door, for both the ‘on’ and the ‘off’ condition of the electric motor. A latching clip over-rides action of the original door latch.

REFERENCES:
patent: 1326286 (1919-12-01), Perkins
patent: 3012520 (1961-12-01), Curtis
patent: 3785089 (1974-01-01), Smith
patent: 4167833 (1979-09-01), Farina et al.
patent: 4348835 (1982-09-01), Jones et al.
patent: 4924626 (1990-05-01), Ts'ao
patent: 5046283 (1991-09-01), Compeau et al.
patent: 5076016 (1991-12-01), Adams et al.
patent: 6061964 (2000-05-01), Arnell et al.
patent: 6751909 (2004-06-01), Ranaudo

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