Door safety bar
First Claim
Patent Images
1. In a door of the roller or sliding type comprising a door curtain or panel having a leading edge which is guided for movement along guide channels engaging its lateral edges, a safety braking device comprising:
- mounting means hingedly connected to the leading edge of said door curtain or panel for tilting movement about an axis parallel to the plane of the door curtain or panel, andresistance means carried on said mounting means, and arranged, upon appreciable tilting movement of said mounting means, to engage said guide channels for braking the movement of the door,the arrangement being such that when the leading edge of the door encounters an obstruction in its path during closing thereof, said mounting means will tilt about its said hinge axis which in turn results in the door movement being braked by virtue of the interengagement of said resistance means and the guide channels.
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Accused Products
Abstract
A safety braking device for a roll up or sliding door having a door curtain guided for movement by guide channels engaging its edges, the safety braking device comprising a tilt bar hingedly attached to the leading edge of the door curtain, and brake means carried on the tilt bar and arranged, upon appreciable tilting movement of the tilt bar, to frictionally engage with the door curtain guide channels for braking the movement of the door.
72 Citations
11 Claims
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1. In a door of the roller or sliding type comprising a door curtain or panel having a leading edge which is guided for movement along guide channels engaging its lateral edges, a safety braking device comprising:
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mounting means hingedly connected to the leading edge of said door curtain or panel for tilting movement about an axis parallel to the plane of the door curtain or panel, and resistance means carried on said mounting means, and arranged, upon appreciable tilting movement of said mounting means, to engage said guide channels for braking the movement of the door, the arrangement being such that when the leading edge of the door encounters an obstruction in its path during closing thereof, said mounting means will tilt about its said hinge axis which in turn results in the door movement being braked by virtue of the interengagement of said resistance means and the guide channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a roller door assembly of the type comprising a door curtain having a lower edge and guided for vertical movement along guide channels engaging its lateral edges, a safety braking device comprising:
an elongate safety bar carried on the lower edge of said door curtain and approximately coextensive connecting, hinge means hingedly connected said safety bar to said door lower edge whereby the safety bar is able to undergo limited tilting movement about a horizontal axis, brake pads carried on said safety bar at its ends being arranged to frictionally engage, upon appreciable tilting movement of the safety bar, against inner surfaces of the guide channels to thereby brake the movement of the door, the arrangement being such that upon the door leading edge encountering an obstruction, the safety bar is tilted about its hinge axis and the door movement is braked by virtue of the force applied by the brake pads against the guide channels.
Specification