A handle having a cylindrical bore therethrough. A driving ram is slidable in the bore and adapted to drive a stud held in one end of the bore. An igniting ram is also slidable in the bore rearwardly of the driving ram. Means are provided for introducing a caseless charge between the driving ram and igniting ram.

A cartridge-actuated tool adapted to explosively drive fasteners is provided which ejects the actuating cartridge into a propulsion chamber while controlling cartridge rupture so as to avoid tool damage.

A powder charge-operated bolt setter is formed with a reduced axial length for effectively securing exothermic plates on chill molds. In the casing of the bolt setter a percussion pin and a barrel are arranged in spaced parallel relationship and a lever situated within the casing to be pivoted by the percussion pin against a firing pin aligned with the rear end of the barrel for exploding cartridges held in a magazine which is guided in a stepwise manner through the casing. A release bar extends...

A device for driving bolts or studs into structural elements comprises a tubular housing having a closed upper end and an open lower end. A socket fixed in the upper end of the housing includes a passage and a firing chamber communicating therewith. A firing pin axially slidable in the passage can be selectively projected by means of a rotatable pushbutton shank, interposed between the upper end of the housing and the socket, which has a plurality of circumferential recesses of different depths ...

A powder actuated tool utilizing caseless powder loads and having a hammer anvil in driving relationship with a firing pin and a safety lever normally preventing anvil movement from its non-firing position; and a fastener driving ram with an ignition chamber for a caseless powder load cooperable with the firing pin and being engaged with a fastener carried by a ram guide member slidable in the tool housing. The ram and its guide member forming fastener drive means extendable from the muzzle end ...

A tool for firing fasteners into a supporting surface, which tool utilizes compacted pellets of ignitable material as a source of power. A compound firing chamber is provided to facilitate loading with a pellet magazine, a pellet feed being positioned in the handle of the tool. The tool is cocked for firing by pushing the barrel against the supporting surface, and cannot be otherwise fired. The tool preferably includes a fastener-driving member in the form of a piston and the piston can be autom...

A power-actuated fastening tool of the type for driving fasteners by a propellant charge wherein a fastener driving member has an enlarged head portion. The head portion is so designed that a portion of the gases generated by the propellant charge may bleed from the rearward side to the forward side thereof to reduce recoil and buffer the fastener driving member. In addition, a specially designed piston member is provided for driving threaded fasteners wherein the piston has a bore extending int...

There is disclosed a gun for driving nails, bolts, etc., by the force generated by detonating an explosive cartridge, the gun including a firing mechanism with a striker pin for detonating the cartridge by operating the firing mechanism. The gun comprises a jacketed gun barrel including one or more recesses which are connected with a pocket below the barrel so that the gases generated upon firing of the gun can escape through said recesses into the pocket and then an annular space outside the ba...

A cartridge actuated stud fixing tool is disclosed which is provided with a two chamber magazine slideable from side to side to bring one chamber to an ejection position and the other to a firing position and axial ejection means operated by the cocking movement of depressing the barrel against a workface which ejection means push the last fired cartridge backwards out of the chamber which is in the ejection position.

A powder actuated tool, including a barrel for receiving in one end thereof a driveable fastener, a driving ram slideable within the barrel for driving the driveable fastener, and a chamber for receiving an explosive cartridge in the end opposite the driveable fastener. Said barrel pivotally mounted to a handpiece whereby in a firing position the cartridge is nested within a breech block provided in the handpiece, and being pivotable away from said breech block for loading and unloading cartridg...