US Patent 9091120 Collabsible platform assembly for an extension ladder

A platform in combination with ladder-like rails combine to form an add-on device that is connected to a rung near the top of an extension ladder so that the platform is rotatably connected to the extension ladder and the ladder-like rails. In a storage or retracted position, the add-on device is generally co-planar with the extension ladder; and in a use position, the platform can be extended from the extension ladder and directly supported by a roof. The platform acts as a rigid support for the top of the ladder and does not deflect under load. The ladder-like rails act as “grab rails” so that a user can “grab” or hold on to them while walking through the top of the extension ladder. Also, one or more retractable hand rails provide added safety when the user moves onto the platform.