Reinforced tubular door support

Details Reinforced tubular door support Reinforced tubular door support

1991-07-02

1993-04-20

Oberleitner, Robert J.

Brakes

Plastic deformation or breakage of retarder element

Crushable element

296146R, 296189, F16F 712, B60J 500

Patent

active

052034364

ABSTRACT:
A deformable, reinforced tubular door member for absorbing energy occasioned by an impact force exerted thereupon is disclosed, having a deformable tube having an open space therewithin, and a spiralled stiffening element positioned within the open space of the deformable tube and having a plurality of surface elements which are arranged such that when the impact force is exerted upon the tubular member, the elements exert a resisting force against the tubular member. In one embodiment, the stiffening element is a coiled or spiral spring. In another embodiment, the stiffening element is a strip which is twisted about its lengthwise axis so that the surface elements are arranged in a double helix. In a still further embodiment, the strip is twisted in order that it have one twist per centimeter.

REFERENCES:
patent: 54346 (1866-05-01), Hill
patent: 2864405 (1958-12-01), Young
patent: 3271812 (1966-09-01), Skolnik
patent: 3364622 (1968-01-01), Collard
patent: 3464450 (1969-09-01), Steffenini
patent: 3478384 (1969-11-01), Skolnik
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patent: 3868141 (1975-02-01), Johnson
patent: 4488751 (1984-12-01), Kling
patent: 4685722 (1987-08-01), Srock
patent: 4866883 (1989-09-01), Brown et al.
patent: 4945682 (1990-08-01), Altman et al.

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