Abstract: A running wheel block, including a housing having at least one connecting surface for connection to a supporting framework, and further having two opposing, detachable side walls, two inwardly directed rotary bearing holding hubs, arranged in the housing, rotary bearings mounted in the hubs, and a running wheel mounted in the rotary bearings so that a section of its running surface projects from the housing toward at least one side. Each of the holding hubs is arranged on one of the two opposing side walls of the housing. The housing further includes at least one spacing holder arranged between the opposing side walls. The spacing holder forms a connecting surface. The detachable side wall has centering members that, when the side wall is attached to the housing, determine the position of the holding hubs relative to the running wheel axis.

Abstract: The sacrificial tube shock attenuation device services as a deformable energy absorbing system designed to be employed between a bumper receiving a potentially destructive force and a payload which is to be protected from the force. The device is composed of a tube assembly running through and aligning apertures of a maul, or series of mauls, which is (are) attached to the bumper and the apertures of a pair of stators, or multiple pairs of stators, that each maul is situated between. The stators are attached to the payload. When overloaded the maul(s) moves relative to the stators causing a misalignment of their respective apertures resulting in deformation of the tube assembly. A simple tube assembly may be comprised of a single tube. A more complex tube assembly may be comprised of multiple tubes within tubes depending on the anticipated overload. In a multi-tube assembly the inner tubes receive the load consecutively as the misalignment of the apertures of the maul and stators progresses.