| 摘要 |
An explosively actuated tool for driving a fastener into a substrate by firing of an explosive charge, the tool being of the type in which the tool is mountable to the end of a pole-like handle to permit manipulation and actuation of the tool from a remote position wherein actuation of the tool occurs by pushing the forward end of a barrel of the tool against the substrate using the handle and then pushing forwardly the handle which loads and then releases a firing mechanism of the tool to fire the charge, wherein the tool has a safety lock device for inhibiting loading of the firing mechanism sufficiently to initiate firing unless the tool is orientated upwardly into a vertical or near vertical orientation, the lock device comprising a locking ball which, when the tool is moved upwardly into a vertical or near vertical orientation, will roll by gravity into a position in which it is unable to inhibit loading and release of the firing mechanism and when the tool is lowered out of the vertical or near vertical orientation to a horizontal orientation the ball will roll out of said position into a position in which it will block forwards movement of the handle to an extent sufficient to prevent firing.
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