Swing door operating system
First Claim
1. An automatic door actuating system for actuating a hinged door in opening and closing displacement, said system having a reversible electric motor mounted on the hinged door adjacent the free edge of the door, said motor being in driving relation with a pulley, said pulley engaging a tensioned flexible line, said line extending substantially horizontally between a first attachment point on a lintel portion of said door frame and a second attachment point on a surface located adjacent said door free edge when said door is in a fully open position;
- and means for energising said motor in a selected mode of opening and closing rotation, whereby, upon energization of said motor said pulley engages said line to draw said door in a respective opening/closing displacement;
a gear wheel secured to said pulley for rotation therewith, and a toothed rack projecting from said lintel to engage said gear wheel when said door is in a substantially closed position, whereby with said gear wheel engaged by said toothed rack, said motor can displace said door relative to said frame, independently of said flexible line.
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Accused Products
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.
13 Citations
16 Claims
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1. An automatic door actuating system for actuating a hinged door in opening and closing displacement, said system having a reversible electric motor mounted on the hinged door adjacent the free edge of the door, said motor being in driving relation with a pulley, said pulley engaging a tensioned flexible line, said line extending substantially horizontally between a first attachment point on a lintel portion of said door frame and a second attachment point on a surface located adjacent said door free edge when said door is in a fully open position;
- and means for energising said motor in a selected mode of opening and closing rotation, whereby, upon energization of said motor said pulley engages said line to draw said door in a respective opening/closing displacement;
a gear wheel secured to said pulley for rotation therewith, and a toothed rack projecting from said lintel to engage said gear wheel when said door is in a substantially closed position, whereby with said gear wheel engaged by said toothed rack, said motor can displace said door relative to said frame, independently of said flexible line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- and means for energising said motor in a selected mode of opening and closing rotation, whereby, upon energization of said motor said pulley engages said line to draw said door in a respective opening/closing displacement;
Specification