Patent ID: 7032881
Filing Date: 2006-04-25
Classification: B25F,F16K

Abstract:
1. A switch mechanism for a pneumatic tool comprising: a choke ring disposed in an air passage of a pneumatic tool, at a center of the choke ring formed with an air hole; a control rod swayably inserted through the air hole of the choke ring, and a first end of the control rod corresponds to a trigger of the pneumatic tool; a choke member provided for insertion of a second end of the control rod, the choke member pushed by a spring so that the choke ring is sealed by an end surface of the choke member; wherein a bushing is provided in the air passage of the base body and located between the choke member and inner wall of the air passage of the base body, and between the choke member and the choke ring, so as to prevent the inner wall of the air passage of the base body and the choke ring from being worn or abraded by the choke member.