Patent ID: 8220811

Claim:
A hot-bent arm material for automobile suspension, characterized in that the arm material comprises a body member which is a single member in its lengthwise direction, the body member having a flat, closed cross-sectional shape and a pair of opposing long sides, and the body further comprises at least a first portion, a second portion, and a third portion between the first and second portions in its lengthwise direction, wherein said first portion has a first bent portion which is bent in a plane parallel to the pair of long sides and said third portion has a second bent portion which is bent in a plane perpendicular to the pair of long sides in the first portion and the pair of long sides in the second portion, so that the pair of long sides in the first portion and the pair of the long sides of the second portion are in different planes from each other, and wherein the body member has a quenched portion.