Self-restoring energy absorbing bumper mount

Details Self-restoring energy absorbing bumper mount Self-restoring energy absorbing bumper mount

1985-09-30

1986-11-25

Song, Robert R.

Vehicle fenders

Buffer or bumper type

Bumper having impact force absorbing means directly...

293137, 267140, B60R 1902

Patent

active

046244930

ABSTRACT:
An energy absorbing bumper mounting arrangement including a longitudinally extending tubular member having a forward portion secured to a vehicle bumper and an aft portion slidably received in a circular opening formed in a vehicle frame portion. A cylindrical capsule of thermoplastic polyester elastomer material has a central passage telescopically receiving the tubular member aft portion. Abutment means fixed on the tubular member engages an intermediate frame wall preventing its forward travel. A preloaded coil spring is concentrically disposed about the tubular member between the forward end of the capsule and the abutment means. The capsule is surrounded by a chamber defined by wall means formed in the frame. A predetermined impact load on the bumper causes the capsule to elastically and plastically deform in a radially outward manner such that upon contacting the chamber walls a permanent set corrugated-like undulation is formed resulting in the dissipation of impact energy. The coil spring expands to accommmodate the reduced length of the capsule thereby returning the bumper to its original position. After a plurality of impacts the deformed capsule may be replaced enabling all other components of the mount to be reused.

REFERENCES:
patent: 3715114 (1973-02-01), Thorsby
patent: 3715139 (1973-02-01), Tuggle
patent: 3741560 (1973-06-01), Schaller
patent: 3829142 (1974-08-01), Bommarito
patent: 4061386 (1977-12-01), Chupick
patent: 4097080 (1978-06-01), Petry
patent: 4200318 (1980-04-01), Gute et al.

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