Abstract: A guide rail for guiding a pair of angled or horizontal guide wheels (17,18) of a guide assembly. The guide rail comprises a rail base (2), a rail head (4), and a rail web (3) interconnecting the rail base (2) with the rail head (4). The rail head (4) has at least one zone facilitating engagement and disengagement of the guide wheels with the guide rail. The zone has a narrowed area in which the guide head (4) has a narrower transverse width dimension which is less than the larger transverse width dimension on opposite sides of the zone and less than a normal engagement spacing of the guide wheels from one another such that the pair of guide wheels (17,18) are only movable vertically into and out of engagement with the guide in the zone while the pair of guide wheels (17,18) are prevented from moving vertically into and out of engagement with the guide rail, relative to the guide rail, by the larger transverse width dimension of the guide head (4).

Abstract: The translation block with disengaging nut (15) comprises a translation body (4) which serves as a housing for the nut (15) and which slides along the guide element (7) surrounding the screw. The interior unit comprises the nut (15) formed of two mechanically identical pieces (29, 30) which are attached to the screw (13) and separated by an elastic restraint, and an immobilizing-release device (18) cooperating with blocking grooves (42) on the nut, comprised of two flanges (20, 21) each pivoting on an axle parallel to the screw, elastically joined to the nut and released through the action of a pneumatic force. This invention is of interest to manufacturers of storage devices, for example, screw-mounted lifting mechanisms for vehicle transport trailers.

Abstract: Demountable road transport unit characterized in that it consists of a motor vehicle (8) equipped with a coupling (5) and a demountable body (9), the coupling on the motor vehicle, situated towards the front, and the body comprising on the one hand, in front, a supporting and locking link and also two supports for the body in the demounted position and on the other, at the rear, immobilizing and centering device (30) and also at least one rear support and, towards the bottom, a towing hook support integrated into the body.