A pneumatic fastener includes a housing and a handle coupled to the housing. The handle defines an inlet channel for delivering compressed gas to the housing. A trigger valve is in communication with the inlet channel and configured to actuate the pneumatic fastener. A fastener driving assembly is disposed within the housing. The fastener driving assembly includes a cylinder and a piston that reciprocates within the cylinder to drive a fastener. A valve piston is coupled to the fastener driving assembly. Actuation of the valve piston causes compressed air to drive the piston within the cylinder to drive the fastener. An outer cap is coupled to the housing and an inner cap is disposed at least partially within the outer cap. The inner cap includes an opening in communication with the trigger valve for porting the compressed air to a region above the valve piston.

The fastener tool includes a nosepiece, a nosepiece cover pivotally attached to the nosepiece, a latch pivotally attached to the nosepiece cover, a latch wire pivotally attached to the latch for engaging at least one hook disposed on the nosepiece, wherein the latch wire has a portion extending between the latch and the hook, the portion having at least two bends.

A pneumatic fastening tool assembly that employs an engine having a sliding sleeve arrangement to control the supply of air to and exhaust from the pneumatic engine. The sliding sleeve arrangement eliminates the need for a conventional main valve and thereby reduces the overall weight and length of the pneumatic fastening tool relative to those tools that employ a conventional engine configuration.

A fastening tool can include a housing and a motor assembly in the housing. The motor assembly can include an output member and a motor for translating the output member. A knob can be rotatably coupled to the housing and include a first surface. An adjustment element can have a second surface and a threaded aperture. The second surface can be engaged to the first surface such that rotation of the knob effects corresponding rotation of the adjustment element. An adjustment rod can be threadably received into the threaded aperture. A lower contact trip can be coupled to the adjustment rod. A locating formation can be coupled to one of the housing and the knob. An indexing member can be coupled to the other of the housing and the knob. The indexing member can engage the locating formation to resist rotation of the knob relative to the housing.

The present invention provides a head valve assembly for a pneumatic fastener including a piston assembly reciprocated within a cylinder assembly for driving a fastener and a housing having an end cap for at least partially enclosing the head valve assembly. The head valve assembly includes a valve piston for causing supply pressure to be ported to the piston assembly for moving the piston assembly within the cylinder assembly from a non-actuated position to an actuated position for driving the fastener. Further, an inner cap is disposed within the end cap around the valve piston. The inner cap includes an inlet port for porting pressure to the valve piston. In addition, a main seal is coupled to the valve piston for sealing the cylinder assembly from supply pressure while pressure is ported to the valve piston by the inner cap for holding the piston assembly in the non-actuated position. The main seal seals pressure ported to the valve piston by the inner cap from supply pressure ported to the piston assembly.