Abstract: This invention relates to an infant trainer seat for releasable mounting to a standard commode or toilet seat. The trainer seat includes a tubular support frame and cross-members adapted to rest on the standard seat, span the opening of the standard seat and releasably grasp the standard seat. The trainer seat portion defines a child-receiving opening and is secured to the support frame with the opening positioned on the frame for alignment with the opening in the standard seat. A collapsible backrest system is provided which includes a backrest portion that is movable between a raised upright position and a collapsed coplanar position. The backrest system includes a frame mechanism for pivotally connecting the backrest to the main support frame and positioning the backrest in the upright or the co-planar positions.

Abstract: A portable collapsible scaffold structure is adapted to be supported in use upon and transported by a truck or other self-powered ground vehicle, and includes a pair of extensible ladders adapted to be mounted in use adjacent to the vehicle and coupled thereto by extensible support means for raising and lowering the ladders simultaneously, the ladders supporting between their upper ends a work platform. Extensible support posts support the ladders intermediate the ends thereof and are coupled to extensible carriage means which support the lower ends of the ladders for movement along the ground or other support surface during raising and lowering of the ladders. The entire structure is hydraulically operated and control means coupled to the ladders and the platform maintain the platform substantially horizontal during raising and lowering of the ladders. The entire scaffold structure can be readily disassembled and stored on the associated vehicle for transportation thereby.