Patent ID: 7143840

Claim:
An impact tool comprising: a cylindrical housing; and longitudinally vibratable needle chisels set in said housing which are configured to extend forward from an opening formed at a front end of said housing; wherein said housing comprises: a front cover part extending rearward from the front end of said housing; a housing body detachably connected to a rear end of said front cover part; and a claming device configured to clamp said front cover to said housing body; further wherein said front cover part comprising: an annular fastening portion placed on and clamped to an outer peripheral surface of a front edge portion of said housing body, thereby being connected to said outer peripheral surface; a cylindrical portion extending from the front end of said housing into a region of said fastening portion; and a connecting portion connecting together said cylindrical part and said fastening portion; and further wherein said fastening portion is split at a circumferential point thereof, thereby having a pair of tongue-shaped portions opposing to each other circumferentially; and said clamping device is provided between said tongue-shaped portions and movable between a clamping position where said clamping device pulls said tongue-shaped portions toward each other and an unclamping position where said tongue-shaped portions are released from the condition of being pulled toward each other.