FLEURET D'OUTIL A PERCUSSION

摘要

The vibrational characteristics of a percussion tool bit are varied by affixing a restraining collar thereto in accordance with the level of dampening desired. This collar is permanently affixed to the tool bit by incorporating a rigid interlock therebetween and a special compressible material is utilized therein to withstand high operating temperatures. Where the tool bit includes a detachable work tip, the tip is configured to serve as a protective shield for the collar upon penetration into materials. As part of this configuration, a conical surface is provided to facilitate withdrawal of the tool bit from penetrated materials and to avoid inadvertent removal of the tip during penetration.