Patent ID: 8887442
Filing Date: 2014-11-18
Classification: E05D,E05Y

Abstract:
1. A dock door system comprising: a first track and a second track, the first track comprising (i) a first sidewall comprising a first substantially planar region, (ii) a second sidewall comprising a second substantially planar region and (iii) a third sidewall comprising a third substantially planar region, the third sidewall being positioned between the first sidewall and the second sidewall, the first substantially planar region, the third substantially planar region and the second substantially planar region being consecutive planar regions, a first angle being defined by the first and third substantially planar regions and a second angle being defined by the second and third substantially planar regions; and a dock door comprising a first plurality of wheel-and-axle assemblies and a second plurality of wheel-and-axle assemblies, each of the first plurality of wheel-and-axle assemblies comprising a first wheel positioned on an axle and a biasing mechanism, each of the first wheels positioned on a respective one of the axles biased to a position by a respective one of the biasing mechanisms so as to ride in the first track, the first plurality of wheel-and-axle assemblies being configured to allow the first wheels to move toward the dock door and out of the first track if the door is struck with sufficient force in a direction that pushes the first wheels against the first sidewall, wherein the first angle ranges from about 100° to about 160°.