Patent ID: 8297906

Claim:
A work equipment boom adapted to be attached to a main body of a construction machine at one end and to a work equipment arm at the other end, the work equipment boom comprising: a boom main component integrally formed by expanding a tubular material, the boom main component having a proximal end portion including a first end part arranged to be disposed adjacent to the main body, the proximal end portion having a shape that increases in horizontal width as it gets nearer to the first end part, and a distal end portion including a second end part arranged to be disposed adjacent to the work equipment arm, the distal end portion having a shape that increases in horizontal width as it gets nearer to the second end part, the boom main component having a curved shape, with a concave part and a convex part being formed in a side surface of a curved portion of the boom main component, the convex part extending between an upper end and a lower end of the concave part so as to traverse the concave part in a generally vertical direction.