Patent ID: 7131481
Filing Date: 2006-11-07
Classification: E06B

Abstract:
1. A motorized door comprising: a flexible curtain closure member having a transverse bottom edge and opposed side edges; spaced apart guide tracks for guiding said side edges of said closure member for movement between open and closed positions, at least one of said guide tracks comprising a channel shaped member having a web and opposed flanges, said flanges including reentrant distal ends providing a reduced width slot between said flanges for receiving one of said side edges of said closure member; opposed windlock members supported on said closure member at said side edges thereof, respectively, for movement within said guide tracks for retaining said side edges of said closure member in said guide tracks, said windlock members on said one side edge being configured for engagement with said distal ends of said flanges while said windlock members on the other of said side edges are operable to exit said other guide track in response to a predetermined force acting on said closure member; and curtain stiffening means secured to said closure member adjacent said bottom edge for stiffening said closure member against deflection in a direction out of a plane in which said closure member is disposed in a door closed position of said closure member while allowing deflection of said closure member substantially vertically and within said plane of said closure member, said stiffening means comprising plural interconnected links extending across said closure member from said one side edge toward said other side edge and adjacent said bottom edge, said links being secured to said closure member and to each other, respectively.