Abstract: A cross member includes a steering shaft support and mounts a ground engaging wheel at each end thereof via a component mounted at each end of the cross member for partial rotation about a vertical axis. A steering arm extends from this component which is adjustably clamped to the steering arm. A connecting rod extends from each steering arm to a centrally located pitman arm extending from the steering shaft which in turn is mounted on the steering shaft support. Preferably, one connecting rod freely hooks onto one steering arm and to the pitman arm with the other connecting rod being hooked to the other steering arm and to the first connecting rod. The angular relationship between the pitman arm, the connecting rods and the hooked ends of the steering arms causes the wheels to turn at different radii and the hooked connections provide the necessary up and down movement without excessive play or clearance thus eliminating the need for more expensive pivot type assemblies.

Abstract: If any portion of a rigid surface is to be extended above the plane of the rest of the surface, then the extendible portion must be pierced. If it is necessary to keep elements from entering the resulting cuts and openings necessary to accomplish such an extension, then a weatherproof seal must be provided especially for those cuts pierced in a direction perpendicular to weathering forces and parallel to natural drawings. Since roofs are of varying shapes, there is a need for universal plates to be inserted in above mentioned cuts. These plates will provide a weatherproof seal in either extended or conventional configuration.