Abstract: A removable rear shelf for a motor vehicle and lateral supports therefor. The shelf includes a pair of front corners and an abutment surface adjacent the front corners on the bottom surface of the shelf. Each of the lateral supports includes a surface on which the bottom surface of the shelf rests when installed in the motor vehicle, a coupling element which receives a front corner of the shelf and permits rotation of the shelf relative to the supports for installation and removal, and an abutment surface which is complementary with the abutment surface on the shelf to prevent rearward movement of the shelf when installed.

Abstract: The invention provides a method and apparatus for the high pressure injection of polyurethane foam into a hollow envelope using means of the type including a chamber for mixing the constituents of the polyurethane foam, a cylinder communicating with said chamber and open at both its ends, one of its ends opening into the orifice of the hollow envelope and the other end serving as inlet for a piston adapted for sliding in said cylinder and driving the polyurethane foam therefrom into said envelope, wherein said envelope is substantially vertical, its upper end opens into the orifice of the hollow envelope and is of a volume close to half that defined by the envelope and the movement of the piston in said cylinder is adjustable in synchronism with the cycle of the mixing head.