Patent ID: 6082811
Filing Date: 2000-07-04
Classification: B21C,B21H,B21K,B60J,B62D

Abstract:
A hollow structural member comprising a hollow body portion adapted to be fixedly disposed on a motor vehicle, said hollow structural member further comprising:a reinforcement having a hollow structure which has an outer surface and which is fixedly disposed within said hollow body portion having an inner surface such that said outer surface of said hollow structure is in substantially close contact with said inner surface of said hollow body portion,and wherein said reinforcement includes a thick-walled portion located at a longitudinal central portion thereof, and two decreasing-thickness portions located at longitudinally opposite end portions thereof disposed on opposite sides of said thick-walled portion, each of said two decreasing-thickness portions having an inner surface which is formed such that a wall thickness of said each decreasing-thickness portion continuously decreases in a longitudinal direction from said thick-walled portion toward a longitudinal end of a corresponding one of said longitudinally opposite end portions and such that said wall thickness at said longitudinal end is substantially zero,and wherein said thick-walled portion comprises at least one solid partition wall which separates a space within said hollow structure of said reinforcement into two longitudinal sections.