Patent ID: 8215415
Filing Date: 2012-07-10
Classification: B23B,B25D,Y10T

Abstract:
1. A chisel, comprising: a shank having opposite ends; one end of the shank comprising an insertion portion; and the end of the shank opposite the insertion portion comprising a head, wherein the head is a working end and wherein a cross sectional area of the shank increases in the direction of the head at least once from a first small cross sectional area to a large cross sectional area and then decreases to a second small cross sectional area to form a bead, wherein the bead dampens vibration, wherein the bead is part of the shank, the bead is at a position on the shank between the insertion portion and the head, and the bead is at a distance from the insertion portion, wherein the insertion portion, head, bead, and shank are formed out of one piece, wherein the bead is rotationally symmetric about a longitudinal axis and has a circular cross section perpendicular to the longitudinal axis, wherein the bead is arranged in that half of the shank which faces the insertion end, and wherein the shank is not helical.