Patent ID: 7461704
Filing Date: 2008-12-09
Classification: B25F

Abstract:
1. pneumatic tool, comprising: a plastic housing; a handle; an inlet located at a lower end of the handle to receive compressed air from outside; a cylinder; an air intake passage located between the air inlet and the cylinder; an air flow control structure having a valve bushing and a control bar; the valve bushing being connected to the air intake passage, the valve bushing connecting to a first air intake flow path and a second intake flow path; the first intake flow path and the second air intake flow path connecting with the cylinder and being respectively the air flow paths of positive and reverse rotation for the cylinder; said control bar being located inside the valve bushing and being movable to selectively change rotation of a rotor in the cylinder in a positive direction or reverse direction; the valve bushing being located at a lower side of the cylinder to hold the control bar, the valve bushing and the cylinder being formed integrally in one piece; the control bar having an interceptor and a first air passing channel and a second air passing channel at two sides of the interceptor, the control bar being movable forward or backward in the valve bushing to a first position where the air intake passage is coupled with the first air passing channel and the first air intake flow path and to a second position where the air intake passage is coupled to the second air passing channel and the second air intake flow path.