Impact tools

Claim 1

AN IMPACT TOOL OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION, A TUBULAR BODY; AN IMPACT HEAD; A SHANK CARRYING SAID IMPACT HEAD AT ITS OUTER END, ENTERING THE FORWARD END OF SAID BODY, AND HAVING A REARWARD TERMINAL WITHIN SAID BODY CONSTITUTING AN ANVIL; A HAMMER DEVICE INDEPENDENTLY RECIPROCATABLE WITHIN A FORWARD PORTION OF SAID TUBULAR BODY FROM A POSITION IN WHICH IT IS SPACED REARWARDLY OF SAID ANVIL TO A POSITION WHERE IT IS IN IMPACTING CONTACT WITH SAID ANVIL TO CAUSE THE IMPACT HEAD TO DELIVER A BLOW TO THE WORK, AND VICE VERSA; A COMPRESSED GAS CHAMBER WITHIN A REARWARD PORTION OF SAID BODY; A PARTITION BETWEEN SAID FORWARD AND REARWARD PORTIONS OF THE BODY, AN OPENING IN SAID PARTITION, AND A VALVE CONTROLLING SAID OPENING FOR APPLYING GAS UNDER PRESSURE FROM SAID CHAMBER TO THE REARWARD END OF SAID HAMMER DEVICE TO PROPEL IT FORWARDLY TO STRIKE SAID ANVIL; A SOURCE OF COMPRESSED GAS EMBODIED WITHIN SAID TOOL, AND A SECOND VALVED OPENING CONTROLLING FLOW FROM SAID SOURCE FOR REPLENISHING SAID COMPRESED GAS CHAMER FROM SAID SOURCE WHEN NEEDED; A REARWARDLY DISPOSED HANDLE TELESCOPING WITH SAID BODY AND HAVING LIMITED AXIAL MOVEMENT WITH RELATION TO SAID BODY AND MEANS ACTUATED BY MOVEMENT OF THE HANDLE TO OPEN AND CLOSE SAID REPLENISHING VALVE OPENING.