Patent ID: 6783050
Filing Date: 2004-08-31
Classification: B25C

Abstract:
A pneumatically operated nail gun comprising:a main body having a lower end and defining therein a compressed air chamber; a cylinder fixedly disposed in the main body and providing a cylinder space; a piston slidably movable in the cylinder between its upper dead center and a lower dead center and dividing the cylinder space into an upper cylinder space and a lower cylinder space; a driver blade extending from the piston in the lower cylinder space and protrudable from the lower end of the main body for striking against a head of the nail in accordance with the movement of the piston toward its lower dead center; a control valve supported to the main body and selectively introducing a compressed air into the upper cylinder space from the compressed air chamber and discharging the compressed air in the upper cylinder space to an atmosphere; and a duster mechanism comprising: a duster nozzle provided at the main body for ejecting a compressed air therethrough; an air passage section extending between the duster nozzle and the compressed air chamber; a pressure release valve disposed at the air passage section for selectively shutting off a fluid communication between the compressed air chamber and the duster nozzle; and a pressure reducing section disposed at the air passage section for providing a compressed air passing through the duster nozzle at a pressure lower than that in the compressed air chamber.