Portable power saw

Claim 2

A PORTABLE POWER SAW COMPRISING A SINGLE CYLINDER PORTABLE INTERNAL COMBUSTION ENGINE HAVING A BORE IN WHICH A SINGLE PISTON CONSTITUTING A FIRING PISTON IS OPERABLE, A SEALED COMBUSTION CHAMBER AND A CRANKSHAFT, A CONNECTING ROD CONNECTING SAID PISTON TO SAID CRANKSHAFT, A RECIPROCATING POWER OUTPUT TAKEN DIRECTLY FROM SAID FIRING PISTON BY MEANS OF A FIRING PISTON EXTENSION PASSING THROUGH THE SEALED COMBUSTION CHAMBER, A SAW BLADE ACTUATED BY SAID FIRING PISTON EXTENSION, CRANKSHAFT COUNTERWEIGHT MEANS MOUNTED ON THE CRANKSHAFT AND OF SUCH WEIGHT AS TO ELIMINATE ONLY ROTARY UNBALANCE INTRODUCED BY THE CRANKSHAFT THROW AND ROTATING MOVEMENT OF THE CONNECTING ROD AND DISPOSED SO THAT THE REMAINING UNBALANCE IS RECIPROCATORY IN A DIRECTION CONFINED TO A PLANE PARALLEL TO THE AXIS OF THE ENGINE AND PARALLEL TO THE SAW BLADE AND CYLINDER BORE, GUIDE PINS ON WHICH THE ENGINE IS MOVABLE IN THE DIRECTION OF TRAVEL OF THE FIRING PISTON, AND SHOCK ABSORBING SPRINGS ASSOCIATED WITH SAID GUIDE PINS AND COACTING WITH THE ENGINE TO CUSHION THE VIBRATION OF THE ENGINE IN THE DIRECTION OF TRAVEL OF THE FIRING PISTON.

Claim 3

A PORTABLE POWER TOOL COMPRISING IN COMBINATION AN INTERNAL COMBUSTION ENGINE HAVING A SINGLE RECIPROCATING PISTON, A TOOL ACTUATED BY SAID PISTON, A MAIN FRAME EXTENDING THROUGHOUT SUBSTANTIALLY THE LENGTH OF SAID ENGINE, FIRST BOSS MEANS RIGID WITH SAID MAIN FRAME AND PROJECTING LATERALLY THEREFROM IN POSITION NORMALLY SPACED FROM ONE END OF SAID ENGINE, SECOND BOSS MEANS RIGID WITH SAID MAIN FRAME AND PROJECTING LATERALLY THEREFROM IN POSITION NORMALLY SPACED FROM THE OPPOSITE END OF SAID ENGINE, FIRST GUIDE PIN MEANS CARRIED BY SAID FIRST BOSS MEANS AND PROJECTING TOWARD ONE END OF SAID ENGINE, SECOND GUIDE PIN MEANS CARRIED BY SAID SECOND BOSS MEANS AND PROJECTING TOWARD THE OPPOSITE END OF SAID ENGINE, GUIDED LONGITUDINALLY ON SAID GUIDE PIN MEANS, RESILIENT MEANS SURROUNDING SAID FIRST GUIDE PIN MEANS AND ACTING BETWEEN SAID FIRST BOSS MEANS AND THE BOSS MEANS AT ONE END OF SAID ENGINE FOR ABSORBING VIBRATION OF THE ENGINE IN ONE DIRECTION, RESILIENT MEANS SURROUNDING SAID SECOND GUIDE PIN MEANS AND ACTING BETWEEN SAID SECOND BOSS MEANS AND THE BOSS MEANS AT THE OPPOSITE END OF SAID ENGINE FOR ABSORBING VIBRATION OF THE ENGINE IN THE OPPOSITE DIRECTION, A REAR HANDLE RIGID WITH SAID MAIN FRAME AND EXTENDING REARWARDLY, A SIDEWARDLY DISPOSED FRONT HANDLE ATTACHED TO SAID MAIN FRAME, A CARBURETOR FOR SUPPLYING A FUEL MIXTURE TO THE ENGINE AND ATTACHED TO SAID MAIN FRAME, A FLEXIBLE BELLOWS CONNECTED BETWEEN THE CARBURETOR AND THE ENGINE THROUGH WHICH THE FUEL MIXTURE IS SUPPLIED TO THE ENGINE, SAID FLEXIBLE BELLOWS PERMITTING RECIPROCATING MOVEMENT OF THE ENGINE WITH RESPECT TO THE CARBURETOR, A FINGERPIECE ON THE REAR HANDLE, AND A THROTTLE WIRE CONNECTED AT ONE END TO SAID FINGERPIECE AND AT ITS OTHER END TO THE CARBURETOR THROTTLE.

Claim 4

A PORTABLE POWER TOOL COMPRISING IN COMBINATION AN INTERNAL COMBUSTION ENGINE HAVING A SINGLE RECIPROCATING PISTON, A TOOL ACTUATED BY SAID PISTON, A MAIN FRAME EXTENDING THROUGHOUT SUBSTANTIALLY THE LENGTH OF SAID ENGINE, FIRST BOSS MEANS RIGID WITH SAID MAIN FRAME AND PROJECTING LATERALLY THEREFROM IN POSITION NORMALLY SPACED FROM ONE END OF SAID ENGINE, SECOND BOSS MEANS RIGID WITH SAID MAIN FRAME AND PROJECTING LATERALLY THEREFROM IN POSITION NORMALLY SPACED FROM THE OPPOSITE END OF SAID ENGINE, FIRST GUIDE PIN MEANS CARRIED BY SAID FIRST BOSS MEANS AND PROJECTING TOWARD ONE END OF SAID ENGINE, SECOND GUIDE PIN MEANS CARRIED BY SAID SECOND BOSS MEANS AND PROJECTING TOWARD THE OPPOSITE END OF SAID ENGINE, GUIDED LONGITUDINALLY ON SAID GUIDE PIN MEANS, RESILIENT MEANS SURROUNDING SAID FIRST GUIDE PIN MEANS AND ACTING BETWEEN SAID FIRST BOSS MEANS AND THE BOSS MEANS AT ONE END OF SAID ENGINE FOR ABSORBING VIBRATION OF THE ENGINE IN ONE DIRECTION, RESILIENT MEANS SURROUNDING SAID SECOND GUIDE PIN MEANS AND ACTING BETWEEN SAID SECOND BOSS MEANS AND THE BOSS MEANS AT THE OPPOSITE END OF SAID ENGINE FOR ABSORBING VIBRATION OF THE ENGINE IN THE OPPOSITE DIRECTION, A REAR HANDLE RIGID WITH SAID MAIN FRAME AND EXTENDING REARWARDLY, A SIDEWARDLY DISPOSED FRONT HANDLE ATTACHED TO SAID MAIN FRAME, A CARBURETOR FOR SUPPLYING A FUEL MIXTURE TO THE ENGINE AND ATTACHED TO SAID MAIN FRAME, A FLEXIBLE BELLOWS CONNECTED BETWEEN THE CARBURETOR AND THE ENGINE THROUGH WHICH THE FUEL MIXTURE IS SUPPLIED TO THE ENGINE, SAID FLEXIBLE BELLOWS PERMITTING RECIPROCATING MOVEMENT OF THE ENGINE WITH RESPECT TO THE CARBURETOR, A FINGERPIECE ON THE REAR HANDLE, AND A THROTTLE WIRE CONNECTED AT ONE END TO SAID FINGERPIECE AND AT ITS OTHER END TO THE CARBURETOR THROTTLE.