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US 4,090,734 AGranted
Reinforcement member for an automobile door
AssigneeNissan Motor Co., Ltd.
InventorsSumio Inami, Kiyoshi Koike, Masayoshi Hayashida, Shigeyuki Yamaoka
Life of this patent
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Abstract
A reinforcement member for an automobile door is constructed of a central piece formed from a plate of a high tensile strength steel and two end pieces of a mild steel that is the same material as the material forming an inner panel of the automobile door. The two end pieces are secured to end portions of the central piece and formed with attachment areas, respectively, at which the reinforcement member is secured to the door inner panel.
Claims3
In an automobile:
- a door having an inner panel made of a mild steel;
- a reinforcement member having
- an elongated central piece made of a high tensile strength steel, the central piece having a cross section with an undulation and two end portions spaced from each other along a longitudinal direction of the central piece, and
- two end pieces made of a similar mild steel to the mild steel of which said inner panel is made, the two end pieces being secured to the central piece at the two end portions of the central piece, respectively, the two end pieces being formed with attachment areas, respectively, and being welded at that attachment areas to the inner panel of said door.
1 more element
Dependencies are inferred from the claim text.