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US 5,255,487 AGranted
Door reinforcement tube
AssigneeMannesmann Aktiengesellschaft
InventorsIng E. Wieting, Ing J. Fischer
Life of this patent
Estimating the term…
Abstract
A door reinforcement beam for use in passenger vehicles capable of absorbing lateral impacts includes: a base tube made of a metal having a high degree of strength, toughness and capacity for deformation work and a reinforcing section being disposed and attached to the central portion of the base tube so as to further enhance the door reinforcement's capacity to absorb impact energy.
Claims9
A hollow reinforcement beam having a high degree of stiffness for absorbing lateral impact in a passenger car door, comprising:
- (a) a hollow base tube having ends, a length, a longitudinal bore, a central portion spaced from the ends, and an interior and exterior surface, said base tube being composed of steel;
- and
- (b) a tubular reinforcing section composed of a steel having a higher strength, toughness, and capacity for deformation work than the steel of the base tube being attached to said exterior surface and extending along said central portion only of said base tube.
Dependencies are inferred from the claim text.