Patent ID: 7677426
Filing Date: 2010-03-16
Classification: B25C

Abstract:
1. A fastener driving device comprising: a housing having a reservoir therein, the reservoir being configured to receive a pressurized gas; a nose assembly carried by the housing, said nose assembly having a fastener drive track, at least a portion of the fastener drive track being defined by a movable portion of the nose assembly; a magazine assembly constructed and arranged to feed successive leading fasteners from a supply of fasteners contained therein into said drive track; a fastener driver movably mounted in said housing and configured to enter said drive track and drive the successive leading fasteners into a workpiece; a head valve constructed and arranged to be actuated so as to allow the pressurized gas to move said fastener driver through an operating cycle, the cycle including a drive stroke wherein the leading fastener is driven into the workpiece, and a return stroke; and an actuator constructed and arranged to actuate said head valve, said actuator comprising wherein when the trigger valve is actuated, the pressurized gas flows through the trigger valve to the contact valve via the passageway, and wherein the contact valve is constructed and arranged to 1) contain the pressurized gas if the body portion is in the first position and the movable portion of the nose assembly is beyond a predetermined distance relative to a fixed portion of the nose assembly, and 2) exhaust the pressurized gas from the chamber above the head valve to atmosphere if the body portion is in the second position and the movable portion of the nose assembly is not beyond the predetermined distance, thereby causing actuation of the head valve.