Patent ID: 6648343
Filing Date: 2003-11-18
Classification: A61G

Abstract:
A stair chair comprising:a main frame; a seat assembly mounted to said main frame and configured to pivot about a first pivot axis; said seat assembly including a seat and a support frame pivotally mounted to said main frame wherein at least two laterally spaced front wheels are rotatably attached to a lower end of said support frame; a rail assembly, at least two laterally spaced brackets provided at a lower end of said rail assembly, each said bracket having a back wheel rotatably supported thereon about a common axis of rotation; at least two mounts provided at a lower end of said main frame, each of said mounts being configured to pivotally connect one of said brackets to said main frame for movement about a second pivot axis; said rail assembly being configured to pivot about said second pivot axis independent of movement of said seat assembly and said seat assembly being configured to pivot about said first pivot axis independent of movement of said rail assembly; and a first spacing between an axis of rotation of said front wheels and said axis of rotation of said back wheels when said rail assembly is in a retracted position and a second spacing between said axis of rotation of said front wheels and said axis of rotation of said back wheels when said rail assembly in a deployed position.