Patent ID: 6561285
Filing Date: 2003-05-13
Classification: B25D,E02F

Abstract:
A breaking apparatus which comprisesa percussion device and, in an axial extension thereof, a tool, the percussion device having a percussion piston that is arranged to make reciprocating movements in an axial direction and to strike a strike-receiving surface of the tool for providing an impact impulse in the tool, whereby the tool is adapted to transmit the impact impulse to a target to be broken, a tool stopper arranged to limit axial movement of the tool away from the percussion device, the tool stopper comprising at least one stopper element of elastic material, the stopper element having substantially circular cross section, and wherein a centerline of the stopper element is disposed in a plane perpendicular to the longitudinal axis of the tool, and the stopper element being arranged in a space between the tool and a supporting surface, and wherein, during the stopping of the tool, relative axial movement of the tool and the supporting surface results in a volumetric change in the space for the stopper element, and wherein the stopper element rotates about its centerline and moves in a direction of axial movement of the tool and, while rotating, the cross-sectional shape of the stopper element changes as a volume of the space reduces.