Patent ID: 7845532

Claim:
A fastener driving device for driving a fastener into a workpiece, comprising: a device body; a cartridge containment system mounted on said device body to load and unload at least one gas cartridge; a gas management system positioned in the device body adjacent to the cartridge containment system to receive compressed gas provided by the at least one gas cartridge and to regulate, and direct regulated and unregulated flows of pressurized gas; a valve system mounted in the device body to receive and control the pressurized gas flow from the gas management system, the valve system comprising a trigger valve and a low pressure lock-out system that prevents actuation of the trigger valve when pressure of the unregulated flow of pressurized gas from the at least one cartridge is insufficient to drive a fastener; and a drive engine mounted in the device body to receive and control the regulated pressurized gas flow, the drive engine comprising a gas storage volume surrounding an exterior of a cylinder, the gas storage volume providing a volume of regulated pressurized gas to an interior of the cylinder of the drive engine.