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***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE*** Crash cushion
| Details |
Inventors: Leonhardt, Patrick A.; Cobb, Lincoln C.; Machado, John V.;
Assignee: Energy Absorption Systems, Inc. (Chicago, IL)
Primary Examiner: Will; Thomas B.
Assistant Examiner: Markovich; Kristine
Attorney, Agent or Firm: Brinks Hofer Gilson & Lione
A highway crash cushion provides a system response profile that reduces the stopping distance of an impact event. This crash cushion includes a frame that forms at least two bays arranged one behind another in an anticipated impact direction. The frame includes at least three transverse frames and side frames extending between adjacent transverse frames. Each of the side frames is outwardly bowed and includes first and second side frame elements coupled to the respective transverse frames, and a hinge coupled between the first and second side frame elements. At least one energy absorbing element is disposed in one of the bays, and at least first and second restraints are coupled to the side frames to resist movement of the hinges at an early stage in an impact event. The crash cushion is partially collapsed automatically as the crash cushion is raised from a horizontal to a vertical position, and then extended automatically to its operational position as the crash cushion is lowered from the vertical to the horizontal position. The energy absorbing elements can include tapered frusto-conical sheet metal elements that are stacked with the smaller ends facing first and second opposed sides of the energy absorbing element. |
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DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS Turning now to the drawings, FIG.
1 shows a crash cushion 10 that incorporates a presently preferred embodiment of this invention.
The crash cushion 10 is mounted at the rear of a shadow vehicle or truck T by means of a mounting structure 18.
The crash cushion 10 includes a frame 12 described in greater detail below.
The frame 12 supports an impact face 14 directed away from the truck T, and the frame 12 defines two bays that support respective energy absorbing elements 16.
The frame 12 forms a self-supporting structure, and the energy absorbing elements 16 are designed to absorb energy in an impact but not to serve a structural function in the crash cushion 10.
FIG.
2 shows a more detailed perspective view of the crash cushion 10, including transverse frames 20, 22 and 24 and side frames 26, 27, 28, 30.
The impact face 14 of FIG.
1 is not shown in FIG.
2 for clarity of illustration, but the face 14 is mounted on the transverse frame 20.
In some embodiments, the face 14 can be non-structural or even eliminated.
As best shown in FIG.
4, each of the side frames 26, 27, 28, 30 includes two separate side frame elements 32 that are interconnected by a pair of central hinges 34.
Additionally, each of the side frame elements 32 is connected by additional hinges 36 to a respective one of the transverse frames 20, 22, 24.
As shown in FIG.
4, the side frame elements 32 are bowed outwardly, and the hinges 34 are positioned to allow the side frame elements 32 to move outwardly in an impact.
The transverse frames 20, 22 and the side frames 26, 27 form a first bay 38 that contains the first element 16.
Similarly, the transverse frames 22, 24 and the side frames 28, 30 form a second bay 40 that contains the second element 16.
The energy absorbing elements 16 are attached to and cantilevered from respective transverse frames 22, 24.
As shown in FIG.
5, one or more hydraulic cylinders 52 can be provided in the mounting structure 18 to pivot the frame 12 between the horizontal, operational position shown in FIGS
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