Patent ID: 6151784
Filing Date: 2000-11-28
Classification: E02F,Y10S

Abstract:
An attachment for a construction machine including:a top bracket adapted to be attached to an arm assembly of the construction machine;a frame body;first frame member attached to the frame body;second frame member attached to the frame body in opposing relation with the first frame member;cutting means mounted on respective opposing inner surfaces of the first and the second frame members;crushing means provided on the first and the second frame members at respective front ends of the opposing inner surfaces, at least one of the first frame member and the second frame member being movable toward the other frame member for the engagement therewith;a hydraulic breaker provided at the first frame member or the second frame member and having a chisel with a plurality of stepped portions;a hydraulic power control unit for operating said movable frame member and the hydraulic breaker by hydraulic oil from a single hydraulic power unit; anda swivel joint rotatably connecting the top bracket and the frame body, the swivel joint including a front rotational portion rotatably connecting an electric cable and an connecting cable through an electrically conducting bearing.