Wheeled carriage having auxiliary wheel spaced from center of gravity of wheeled base and cam apparatus controlling deployment of auxiliary wheel and deployable side rails for the wheeled carriage

摘要

A wheeled carriage (16) for supporting a patient horizontally has thereon a patient support (20) having head and foot ends and has a wheeled base (18) supported by castered wheels (31, 33). An uncastered retractable auxiliary wheel (36) and a wheel support structure (34) therefor suspendedly mount the auxiliary wheel (36) at its axis to the wheeled base at a distance (L) in a horizontal direction from the center of gravity of the wheeled carriage in the length direction of the wheeled base when the auxiliary wheel is engaged with the floor surface, to prevent teetering of the wheeled carriage when the auxiliary wheel (34) is engaged with a support surface (56). IMAGE