FASTENER DRIVING TOOLS

摘要

An explosively actuated tool for driving a fastener into a substrate is of indirect acting type having a driving piston mounted within the barrel of the tool for driving th e fastener. The tool is a single shot tool which receives an explosive charge, particularly a .22 cal x 0.613 ins long unnecked charge capable of generating a piston kinetic energy of at least 260 joule. The piston has a recess in its rear face able to smooth-out sharp pressure spikes and reduce peak pressure generated during combustion of the high powered explosi ve charge.