Abstract: A regulator for adjusting the amount of power generated by a pneumatic fastener driving tool of the type having a body connected to a source of air under pressure and containing a cylinder with a piston/driver assembly mounted therein and a main valve. The main valve is slidably supported above the cylinder on a centerpost affixed to a cap closing the top of that portion of the tool body surrounding the cylinder. The main valve is shiftable on the centerpost between a closed position engaging the upper end of the cylinder and shutting off the cylinder from the supply of air under pressure within the tool body and opening vent passages in the centerpost and cap to vent the cylinder volume above the piston to atmosphere, and an open position closing the vent passages and opening the upper end of the cylinder to air under pressure within the tool body to actuate the tool. The regulator comprises an adjustable stop mounted in the centerpost and extending thereabout.

Abstract: A fastener driving tool powered by internal combustion of an oxidizer/fuel mixture. The tool body contains a cylinder provided with a piston/driver assembly. The cylinder is surrounded by and connected to a return air chamber. A combustion chamber, provided with an ignition device, is located at the upper end of the cylinder.

Abstract: A fastener driving tool powered by internal combustion of an air/fuel mixture. The tool body contains connected upper and lower coaxial cylinders. The upper cylinder is provided with a piston assembly and is connected by a one-way valve to a combustion air chamber. The lower cylinder contains a piston/driver assembly and is surrounded by and connected to a return air chamber. The upper cylinder piston assembly and the lower cylinder piston/driver assembly, when in their normal unactuated positions, define therebetween a combustion chamber provided with an ignition device.

Abstract: A fastener driving tool powered by internal combustion of an air/fuel mixture. A tool body has located therein upper and lower coaxial cylinders containing upper and lower pistons, respectively, attached to a common driver and forming a piston/driver assembly shiftable between a normal retracted position and an extended fastener driving position. A combustion chamber at the upper end of the lower cylinder and having an ignition device therein. The tool body contains a combustion air chamber and at least one return air chamber, together with a source of gaseous fuel.

Abstract: A hand tool in the form of a pneumatically actuated mallet. The tool comprises a conventional pneumatic motor of the type employed in pneumatic fastener driving tools, including a tool body having a main cylinder, a piston/driver assembly, trigger-actuated control valve means, and means for connection to a source of air under pressure. A guide body is affixed to the tool body beneath the main cylinder and has a longitudinal bore to slidably guide the driver. A housing is supported by the free end of the guide body and comprises a closed first end adjacent the guide body with a perforation for passage of the driver therethrough, a peripheral wall and an open second end. A mallet is provided having a body portion and a slightly larger head portion with a shoulder formed therebetween. A retainer is affixed to the housing wall partially closing the second end of the housing. The mallet head portion is reciprocally mounted in the housing with its body portion extending through an opening in the retainer.

Abstract: A fastener supply includes a collated strip of fasteners having laterally extending ears. The fasteners are held together by spaced, parallel, preferably flexible elongated carrier strips, adhered to the ears. A magazine feeds fasteners to an inclined or tilted position in a drive station of a fastener driving gun. The apparatus is manipulated over a lug so that the lug extends through a fastener to be driven and engages a locating surface for gun and fastener alignment. Fasteners are rotated, as they are driven, from the inclined to a perpendicular position with respect to the lug. Methods of driving are included.