Patent ID: 6129223
Filing Date: 2000-10-10
Classification: B65G

Abstract:
A push-back rack storage system, comprising:a pair of spaced apart rack rails, each having a lower outer rail flange;a first cart including a pair of spaced apart cart side rails having lower outside cart side rail flanges, and having a pair of front wheels mounted on first front wheel arms and a pair of back wheels mounted on first back wheel arms, with the front and back wheels rolling on the lower outer rail flanges of the rack rails and with the first front and back wheel arms extending outwardly over and downwardly alongside of the rack rails, at each side of the first cart; anda second cart including a pair of spaced apart cart side rails having lower outside cart side rail flanges, and a pair of front wheels mounted on second front wheel arms and a pair of back wheels mounted on second back wheel arms, with the front wheels rolling on the lower outside cart side rail flanges of the first cart, and with the back wheels rolling on the lower outer rail flanges of the rack rails, and with the second front and back wheel arms extending outwardly over and downwardly alongside of the rack rails, at each side of second cart, and with the second front and back wheel arms being taller than the first front and back wheel arms, so that the second cart can roll over the first cart; anda latch spring attached to one of the rack rails and to the first cart and releasable from one of said one rack rail and the first cart, to prevent the first cart from inadvertently moving when the second cart is moved, while allowing the first cart to move when a predetermined force is applied to the first cart.