Impact energy absorber

Details Impact energy absorber Impact energy absorber

1981-11-16

1983-10-04

Shedd, Wayne L.

Fences

Highway guard

104256, 404 6, 114219, A01K 300, E01F 1500

Patent

active

044074840

ABSTRACT:
An impact energy attenuator has a housing in front of a roadway abutment. A leading nose piece and a number of impact walls can move toward and away from the abutment. Coil springs urge the nose piece, the several impact walls, and the housing apart. A cable attached to the nose piece is wound around a drum and is spring tensioned to rotate the drum in a take-up direction. Rotation of the drum in the opposite direction is inhibited by a hydraulic pump discharging through a restricted orifice.

REFERENCES:
patent: 1740027 (1929-12-01), Libani
patent: 3503600 (1970-03-01), Rich
patent: 3545802 (1970-12-01), Rich
patent: 3643924 (1972-02-01), Fitch
patent: 3674115 (1972-07-01), Young et al.
patent: 3680662 (1972-08-01), Walker et al.
patent: 3799064 (1974-03-01), Kikuchi et al.
patent: 3944187 (1976-03-01), Walker
patent: 3982734 (1976-09-01), Walker
patent: 4118014 (1978-10-01), Frosch et al.
patent: 4345537 (1982-08-01), Ueda et al.

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