Importance

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Abstract

A fastener driving tool for use for driving a nail or other anchor into a hardened surface, such as concrete, the tool applicable for feeding a cartridge strip of magazined explosive cartridges through the tool for repeated subsequent driving of a plurality of fasteners into such a surface, the tool incorporating a handle, a tubular housing provided extending forwardly from the handle, a barrel cylinder provided for limited reciprocal movement within the tubular housing, a cartridge chamber provided at the rear of said barrel cylinder for contiguous reception of a cartridge therein in preparation for firing, a piston provided within the barrel cylinder and provided for reciprocal movement therein between a set position arranged approximate the back segment of the barrel cylinder and at its front segment as after a firing and driving of a fastener in place, the barrel cylinder and piston capable of being reset in preparation for refiring, a feed housing mounted upon the barrel cylinder, providing for an indexing of the cartridge strip through the feed housing upon the handle means for selective positioning of a next cartridge aligned with the cartridge chamber in preparation for a next firing, the indexing provided through a circular indexing wheel that is shifted by a carriage device operatively associated within the feed housing.

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First Claim