Patent ID: 6843400

Claim:
A pneumatic motor driving valve of a screw nail gun being assembled to an opening of an air inlet valve of an air inlet channel of a pneumatic motor; the screw nail gun having a gun body; the gun body having at least one cylinder capable of receiving high pressure air; and a driving rod installed in the cylinder; one end of the driving rod being connected to a piston; the piston being able to be actuated by the high pressure air to beat a screw nail to move linearly; another end of the driving rod being driven by the pneumatic motor to generate power to rotate the screw nail; the driving valve comprising: a downward pressing spring on an outer wall of the cylinder; an annular control valve pivotally installed on an outer wall of the cylinder; the annular control valve pressing and located above the downward pressing spring; a valve disk protruding from the annular control valve for controlling opening and closing of an opening of the air inlet valve; a top of the annular control valve being communicated to an inner layer air chamber; when high pressure air is accumulated in the inner layer air chamber; the annular control valve being pushed to press the downward pressing spring so as to open the opening of air inlet valve; and thus the high pressure air being loaded into the air inlet channel for driving the pneumatic motor to rotate; and a bottom of the annular control valve having a lower air chamber for receiving exhausting-high pressure air from the cylinder so as to push the annular control valve to move upwards with the downward pressing spring to close the opening of air inlet valve; thus the pneumatic motor stops.