POWER ACTUATED FASTENER TOOL

摘要

A power actuated tool for driving a fastener into a work surface includes a firing pin (9) for firing an explosive charge to drive the fastener. The firing pin (9) is held in a cocked position against a spring bias by a rotary sear (17) which is displaced rearwardly during cocking by pressing a barrel (3) against the work surface. In the cocked condition, the sear (17) is aligned with a trigger mechanism (29) which can be actuated to pivot the sear (17) and thereby cause release of the firing pin (9) which is then driven by the spring bias to fire the charge.