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US 7,252,133 B2Granted
High load operation of an industrial roll door
AssigneeAlbany International Corp.
InventorsMikael Bengtsson, Hakan Larsson, Raymond Sauve, Holger Siewert, Jan Victor, Kent Palsson
Life of this patent
Estimating the term…
Abstract
A high load operation industrial roll door, including a flexible door curtain windable about a top roll positioned above a door opening and provided with a drive system. The roll door includes a bottom beam fastened to the door curtain, and a biasing spring, for resisting movement of the door upon application of a load thereon, and a positive stop preventing movement of the biasing means beyond a predetermined point.
Claims59
A rolling door comprising:
- a roll and a means for collecting a cable positioned near an aperture for the door and provided with a drive system;
- a door curtain to be wound upon the roll and unwound from said roll;
- a biasing means operable to travel or stretch when an external load is applied to the curtain;
- the cable to be wound and unwound from said means for collecting said cable, and having a first end connected to a bottom of said curtain, the cable running therefrom over pulleys, and a second end of the cable being connected to the cable-collecting means;
- and
- means for preventing the biasing means from traveling beyond a predetermined point, so to prevent movement of the curtain when the load is applied to the curtain when in a closed position.
3 more elements
A rolling door comprising:
- a roll and a means for collecting a first cable positioned near an aperture for the door and provided with a drive system;
- a door curtain to be wound upon the roll and unwound from said roll;
- a biasing means operable to travel or stretch when an external load is applied to the curtain;
- the first cable being wound and unwound from said cable-collecting means and having one end connected thereto, the first cable running therefrom over first and second pulleys, and the other end of the first cable being fixed to a reduction pulley;
- and
- a second cable with one end being fixed, the second cable running over the reduction pulley and a third pulley, and the other cable end being connected to the door curtain.
3 more elements
Dependencies are inferred from the claim text.