Power actuated portable marking tool

A power actuated marking tool comprising,

• a longitudinal housing having a forward end portion and a rearward end portion, said longitudinal housing having a bore therethrough,
• a barrel assembly positioned within said housing bore for relative movement therein, said barrel assembly having a bore coaxially aligned with said housing bore,
• said barrel assembly having a cartridge receiving chamber positioned within said housing rearward end portion,
• a tool holder secured to said barrel assembly adjacent said forward end portion of said housing, said tool holder having a bore therethrough coaxially aligned with said barrel assembly bore,
• tool support means positioned for reciprocal movement within said tool holder bore for retaining marking elements in said tool holder,
• said tool support means having an anvil end portion axially positioned within said tool holder bore,
• a piston member positioned for reciprocal movement within said aligned barrel and tool holder bores and arranged to abut the forward end portion of said cartridge receiving chamber,
• firing means positioned in said housing rearward of said cartridge receiving chamber for actuating forward movement of said piston member in said barrel assembly to strike said anvil end portion and transfer a marking force to said tool support means,
• safety means pivotally connected to said tool holder within said bore thereof for restraining rearward movement of said tool holder and barrel to prevent cocking of said firing means when in a first position, and
• said safety means operable to assume a second position relative to said tool holder to permit rearward movement of said tool holder and barrel to permit cocking of said firing means.