Patent ID: 7097085

Claim:
An explosively actuated tool for driving a fastener into a substrate, the tool being of the type mountable to an end of a handle to permit manipulation and actuation of the tool from a remote position wherein actuation of the tool occurs by pushing a forward end of a barrel of the tool against the substrate using the handle and then pushing on the handle which loads and then releases a firing mechanism of the tool, the firing mechanism including a firing pin, a firing pin spring, and a firing pin spring support by which the firing pin spring is loaded; wherein the tool further comprises, in addition to said barrel and said firing mechanism, a lock device to prevent air firing of the tool by pushing the handle without the forward end of the barrel being pressed against the substrate, the lock device including a lock member which is engageable with one of the firing pin and the firing pin spring support to lock said one of the firing pin and the firing pin spring support against forward displacement unless the lock member is released by a prior axially rearward displacement of the barrel to a predetermined rearward position when the forward end thereof is pressed against the substrate; and wherein said lock member comprises a lever being both (i) displaceable axially of and relative to said barrel, and (ii) pivotable towards said one of the firing pin and the firing pin spring support.