Patent ID: 8382420

Claim:
A cart stop system for a lift platform having an upper load bearing surface, the cart stop system comprising: a moveable cart stop platform section; and a first locking member including a cam member, the locking member configured to engage and hold down the moveable cart stop platform section in a closed position, and to release the moveable cart stop platform section to raise to an open position; the locking member further including a first spring device positioned in contact with the cam member such that the first spring device biases against the cam member when the moveable cart stop platform section is moved towards the closed position by a downforce; such that unless a downforce greater than a specified magnitude is applied to the moveable cart stop platform section to lower the moveable cart stop platform section, the moveable cart stop platform section remains in the open position; wherein in the open position the moveable cart stop platform section blocks cart wheels from rolling over the moveable cart stop platform section and off said upper surface of the lift platform; wherein in the closed position the moveable cart stop platform section is substantially level with an upper surface of the lift platform to allow cart wheels to roll over the moveable cart stop platform section and off said upper surface of the lift platform; wherein the cam member is connected to a lower edge of the moveable cart stop platform section; and wherein the spring device is configured such that upon the moveable cart stop platform section being positioned in the closed position, the spring device is biased against a portion of the cam member to lock the locking member and maintain the moveable cart stop platform section in the closed position.