Patent ID: 7404595

Claim:
A construction machine comprising: a lower traveling structure; a revolving superstructure frame mounted on the lower traveling structure via a swivel so as to be freely turnable; a work implement, which comprises a boomerang-shaped boom, mounted on the revolving superstructure frame substantially at a cross-wise middle position of a front part of the revolving superstructure frame; a counterweight mounted on the revolving superstructure frame at a rear part of the revolving superstructure frame; and an operator's cab mounted on the revolving superstructure frame at one of a right side and a left side of the front part of the revolving superstructure frame, a first projecting member which projects upward, and which is attached to a front face of the revolving superstructure frame at a same side of the revolving superstructure frame as the operator's cab; a second projecting member which is provided at a vertex of the boomerang shape of the boom; a third projecting member which is provided on an upper face of the counterweight at a same side of the construction vehicle as the operator's cab; wherein a virtual plane is defined by three points, which are provided at the first projecting member, the second projecting member, and the third projecting member, respectively; and wherein an operator's cab space is positioned closer to a body of the construction machine than the virtual plane.