Patent ID: 6520358
Filing Date: 2003-02-18
Classification: B66C,B66D

Abstract:
A crawler crane comprising:a revolving frame; a main winding drum, an auxiliary winding drum and a third drum mounted on said revolving frame to wind an operating rope, said respective drums being arranged in a row so that their rotational shafts are at right angles to a center axis of a boom and mounted on said revolving frame; an engine including a power plant for supplying driving pressure oil to said main winding drum, said auxiliary winding drum and said third drum, said engine being mounted on either left or right side of said revolving frame and transversely of at least one of said main, auxiliary and third drums; a counterweight having a recessed portion having a front side formed into a recessed surface, said counterweight being mounted at the rear of said main winding drum, said auxiliary winding drum and said third drum; and a fourth drum installed within said recessed portion.