Power operated piston tool

Claim 1

A POWER-ACTUATED TOOL INCLUDING A HOUSING HAVING A FRONT AND REAR PORTION, BARREL MEANS HAVING A BREECH END AND A MUZZLE END SLIDABLY MOUNTED IN SAID FRONT PORTION FOR MOVEMENT BETWEEN A FORWARD BREECH OPEN POSITION AND A REARWARD BREECH CLOSED POSITION, FIRING PIN MEANS SLIDABLY MOUNTED IN SAID REAR PORTION, COCKING MEANS FOR MOVING SAID FIRING MEANS FROM A FIRED POSITION TO A COCKED POSITION AS SAID BARREL MEANS IS MOVED INTO ITS BREECH CLOSED POSITION, MEANS BIASING SAID FIRING PIN MEANS FROM SAID COCKED POSITION TO SAID FIRE POSITION, SAID BIASING MEANS OPERABLE THROUGH SAID COCKING MEANS TO BIAS SAID BARREL MEANS FORWARDLY FROM SAID BREECH CLOSED POSITION, SLEEVE MEANS DISPOSED ABOUT SAID BARREL MEANS ADJACENT THE MUZZLE END THEREOF, SAID SLEEVE MEANS HAVING LIMITED RELATIVE AXIAL MOVEMENT WITH RESPECT TO SAID BARREL MEANS, MEANS ON SAID SLEEVE MEANS FOR ABUTTING SAID BARREL MEANS UPON REARWARD MOVEMENT OF SAID SLEEVE MEANS TO MOVE SAID BARREL MEANS TOWARD ITS BREECH CLOSED POSITION AGAINST THE BIAS OF SAID FIRING PIN BIASING MEANS, MEANS ON SAID BARREL MEANS FOR ABUTMENT BY SAID SLEEVE MEANS UPON FORWARD MOVEMENT THEREOF TO MOVE SAID BARREL FORWARDLY IN THE HOUSING, STOP MEANS ON SAID HOUSING FOR LIMITING THE REARWARD MOVEMENT OF SAID SLEEVE MEANS TO A POSITION WHEREIN SAID BARREL MEANS IS SPACED FORWARDLY OF ITS BREECH CLOSED POSITION, SAID COCKING MEANS AND SAID FIRING MEANS BEING POSITIONED IN SAID FIRING POSITION UPON MOVEMENT OF SAID BAREL MEANS REARWARDLY RELATIVE TO SAID SLEEVE MEANS INTO A POSITION THAT SAID SLEEVE MEANS IS IN ABUTMENT WITH SAID STOP MEANS AND THE MUZZLE END OF SAID BARREL MEANS IS FLUSH WITH THE MUZZLE END OF SAID SLEEVE MEANS.