Patent ID: 7490912
Filing Date: 2009-02-17
Classification: E21C

Abstract:
1. A round shaft chisel ( 10 ) having a clamping sleeve ( 30 ), wherein the round shaft chisel ( 10 ) has a chisel head ( 11 ) and a chisel shaft ( 15 ) rotatably maintained in the clamping sleeve ( 30 ), the round shaft chisel ( 10 ) comprising: a pivot bearing embodied between an inner contour ( 32 ) of the clamping sleeve ( 30 ) and a shaft contour ( 16 ) of the chisel shaft ( 15 ) so that a center longitudinal axis ( 17 ) of the round shaft chisel ( 10 ) is pivotably seated with respect to a center longitudinal axis ( 35 ) of the clamping sleeve ( 30 ).