Patent ID: 7784562
Filing Date: 2010-08-31
Classification: B25D

Abstract:
1. An impact tool comprising: a tool body; a hammer actuating member which performs a predetermined hammering operation on a workpiece by a striking movement in an axial direction, the workpiece being located at a front side of the impact tool, and the axial direction extending between the front side of the impact tool and a rear side of the impact tool; a cylinder that drives the hammer actuating member, the cylinder being housed within the tool body; and a compression coil spring that contacts the hammer actuating member and thereby positions the tool body with respect to the workpiece when the hammer actuating member is pressed against the workpiece and pushed rearward in advance of the hammering operation, and in this position, absorbs a reaction force that is caused by rebound from the workpiece and acts upon the hammer actuating member when the hammer actuating member performs the hammering operation on the workpiece, wherein: the cylinder is disposed within a housing part of the tool body along the axial direction and a rear part of the cylinder directly contacts an abutment of the housing part of the tool body; and the compression coil spring applies a biasing force to the cylinder in a rearward direction and thereby holds the cylinder against the housing part abutment, thereby axially fixing the cylinder relative to the housing part.