Patent ID: 7708177
Filing Date: 2010-05-04
Classification: B25C

Abstract:
1. A powder-actuated fastener-driving tool comprising: a housing having a front open end and a rear end opposite to each other in an axis; a barrel unit inserted movably into said housing through said front open end and having a rear end portion that is disposed in said housing and that defines a chamber adapted for accommodating gunpowder therein; a holder disposed movably in said housing, abutting against said rear end portion of said barrel unit, and having a through hole defined by an inner annular surface that has an inwardly extending shoulder portion; and a spring-loaded firing pin disposed in said housing and between said rear end of said housing and said holder, and having a free end portion that extends into said through hole in said holder, said firing pin being movable among a normal position, a standby position and a firing position, wherein a trigger unit mounted on said housing and operable so as to enable said firing pin to switch from the standby position to the firing position.