Patent ID: 9248494
Filing Date: 2016-02-02
CPC Classification: B21J,Y10T

Claim Text:
1. A rivet gun comprising: a barrel having a rivet assembly mounted in the barrel; a handle extending downwards from the barrel and having a trigger assembly to actuate the rivet assembly and having an inflator mounted on a lower end of the hydraulic pipe and having an air chamber formed in the inflator: a piston assembly mounted in the inflator, and having at least one buffer device mounted in a corresponding combining hole of the piston assembly and having wherein when the lower space is filled with high pressure gas, the piston head moves upward in the air chamber, the high pressure gas pushes the valve stem of the at least one buffer device upward and presses against the buffer spring to close the valve opening of the housing by the valve part; when the piston head moves downward in the air chamber, the valve stem of the at least one buffer device also moves downward to open the valve opening of the housing by the valve part and release the buffer spring, and further makes the upper space and the lower space communicate with each other.