| 摘要 |
A power-actuated fastener tool for the driving of a fastener object into hard material such as concrete or metal, the tool being of a type having a relatively movable barrel and housing components, the barrel carrying a power load chamber body and a relatively movable piston member which in muzzleward movement drives the fastener object, and on breechward movement achieves ejection of the spent power load cartridge; and the housing carries a movable firing pin assembly. The housing is provided with an offset axially-extending wall, and its opposite ends serve as abutments co-opereative with a transverse pin, carried by the piston and extending through a slot in the barrel wall, to achieve various operative features.
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