Patent ID: 7523955

Claim:
A collapsible wagon assembly ( 20 ) movable between an open position and a folded position comprising; a bed ( 22 ) having an upper surface ( 24 ) and a lower surface ( 26 ) and including a front section ( 28 ) and a center section ( 30 ) and a rear section ( 32 ), a first hinge ( 34 ) attaching said front section ( 28 ) to said center section ( 30 ), a second hinge ( 36 ) attaching said rear section ( 32 ) to said center section ( 30 ), said bed ( 22 ) having a generally rectangular periphery ( 38 ) and extending along a longitudinal axis (A) perpendicular to said hinges ( 34 , 36 ), said center section ( 30 ) having a width along said longitudinal axis (A) between said first and second hinges ( 34 , 36 ) for folding said bed ( 22 ) from an open position to a folded position, a pair of front wheels ( 40 ) mounted to said lower surface ( 26 ) beneath said front section ( 28 ) with each wheel extending to a radial point of contact for rolling engagement with a surface in said open position, said front wheels ( 40 ) being on opposite sides of said longitudinal axis (A) and both spaced along said longitudinal axis (A) a front distance (X f ) from said first hinge ( 34 ), a pair of rear wheels ( 44 ) mounted to said lower surface ( 26 ) beneath said rear section ( 32 ) with each wheel extending to a radial point of contact for rolling engagement along the surface in said open position, said rear wheels ( 44 ) being on opposite sides of said longitudinal axis (A) and spaced along said longitudinal axis (A) a rear distance (X r ) from said second hinge ( 36 ), said assembly ( 20 ) characterized by the distance from said lower surface ( 26 ) to said points of contact of said front and rear wheels ( 40 , 44 ) being equal to said center section width (w c ) to establish said folded position with said front section ( 28 ) and said rear section ( 32 ) parallel to one another as said points of contact of said front wheels ( 40 ) engage said lower surface ( 26 ) of said rear section ( 32 ) at said front distance (X f ) from said center section ( 30 ) and as said points of contact of said rear wheels ( 44 ) engage said lower surface ( 26 ) of said front section ( 28 ) at said rear distance (X r ) from said center section ( 30 ).