Patent ID: 7296721

Claim:
A pneumatic nail gun, comprising: a gun body including a nail punching piston and a nail pushing passage, the nail punching piston being induced by high pressure air to move downwardly to punch the nails and move upwardly to reposition; a nail pusher disposed between an end of the nail pushing passage and a canister, the nail pusher comprising a nail pushing cylinder connecting to the nail pushing passage, the nail pushing cylinder comprising a nail pushing piston and a spring therein; and an air distribution ring fixing to an inner surface of the gun body and adjacent to the other end of the nail pushing passage, the air distribution ring comprising at least one axial through hole and at least one radial through hole, the at least one axial through hole guiding the high pressure air to drive the nail punching piston to reposition after the nail punching piston moves downwardly to punch the nails, the at least one radial through hole guiding and pushing the high pressure air into the nail pushing cylinder via the nail pushing passage to drive the nail pushing piston to take the nails after the nail punching piston move downwardly to punch the nails, and the at least one radial through hole also exhausting the high pressure air in the nail pushing cylinder and the nail pushing passage to make the nail pushing piston reposition to push the nails when the nail punching piston moves upwardly to reposition.