Patent ID: 8689937
Filing Date: 2014-04-08
Classification: E06C

Abstract:
1. A cargo lifting apparatus for use with a ladder having opposed parallel rails and a plurality of rungs connecting the ladder rails, said cargo lifting apparatus comprising: a pair of lift tracks, each lift track coupled to a respective ladder rail and extending substantially between upper and lower ends of said respective ladder rail; wherein each lift track includes first and second adjacent channels, said first channel defining a longitudinally extending slot; at least one guide member positioned in each first channel and configured for slidable movement therein; a carrier assembly, including: a motor coupled to one of a rail or a rung of the ladder; a pulley assembly having a cord operatively coupled to said motor and extending through one of said lift tracks and operatively coupled to said carrier assembly, said pulley assembly configured to move said carrier assembly selectively upwardly and downwardly along said rails when said motor is actuated; an inertia reel mounted adjacent an upper end of the ladder and having an elongated strap movable between a retracted configuration about said reel and an extended configuration extending downwardly away from said reel, said strap having a distal end relative to said reel that is coupled to said carrier assembly; and wherein said inertia reel is configured to stop extension of said strap from said reel if an extension occurs at greater than a predetermined velocity.