Impact absorbing apparatus

Vehicle fenders – Buffer or bumper type – Bumper having impact force absorbing means directly...

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Details

293136, B60R 1930

Patent

active

059475382

ABSTRACT:
An impact absorbing device, preferably for trucks, attenuates the impact of colliding vehicles. A rigid mount secures the apparatus to the truck rear underside. A rigid chassis is suspended from the mount. An impact absorbing bumper exposed for contact at the truck rear controls a displaceable ram that is slidably captivated by the chassis. A wound band assembly suspended beneath the chassis is activated by displacement of the ram. The wound band assembly connects to suitable levers on each side of the chassis that interconnect it with shock absorbers. Energy is dissipated in the shock absorbers over a predetermined compression deflection. This distance is substantially less than the travel distance of the ram, and the mechanical advantage reduction is provided by the combination of the levers and the wound band assembly. When the bumper is forcibly impacted, the ram accelerates longitudinally, tightening the wound band assembly and compressing the shock absorbers through the levers. The shock absorbers are fitted with a plurality of unload restraint assemblies that prevent the impact absorbing apparatus from rebounding to its original state after an impact. The apparatus has a further safety lock to contain the apparatus in a compressed state after an impact until the device can be safely decompressed. This rebound preventer ratcheting dog locks the bumper in its compacted state.

REFERENCES:
patent: 4022451 (1977-05-01), Voight
patent: 4079926 (1978-03-01), Nanes
patent: 4085832 (1978-04-01), Gaines et al.
patent: 4403674 (1983-09-01), Viall, Sr. et al.
patent: 4441751 (1984-04-01), Wesley
patent: 4514002 (1985-04-01), McIntosh
patent: 4929008 (1990-05-01), Esfandiary
patent: 5106137 (1992-04-01), Curtis
Alpha 70k TMA (Form #ENE 590--Jan. 1996.) Energy Absorption Systems, Inc.
Alpha 100k TMA (Form #ENE591--Mar. 1997) Energy Absorption Systems, Inc.
The Alpha 1000 TMA (form #ENE742-891). Energy Absorption Systems, Inc.

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