Abstract: A fastener driving device including a positioning mechanism for positioning a nail into an opening in a workpiece. The positioning mechanism includes an opening locating structure movably connected to the movable assembly of the contact trip assembly and adapted to extend into the opening so as to align the nosepiece with respect to the opening. The opening locating structure is movable relative the movable assembly of the contact trip assembly between an extended position and a retracted position and biased toward the extended position by a first biasing spring to facilitate locating of the opening, and movable to the retracted position when the opening locating structure is pressed against a workpiece. The positioning mechanism further includes a guiding structure movably connected to the nosepiece structure, the guiding structure being biased by a spring to extend forwardly to guide the fastener in a driving track inside the nosepiece.

Abstract: A fastener driving tool includes a housing assembly with a nosepiece assembly defining a drive track. A safety trip assembly includes a trigger enabling portion and a workpiece engaging portion and is movable between an extended disabling position and a retracted enabling position. The safety trip assembly is biased toward the extended position and is moved toward the retracted position by engagement between a workpiece and the workpiece engaging member. The workpiece engaging portion is movable to permit adjustment of a length of the safety trip assembly. The workpiece engaging portion may be removed from the safety trip assembly and exchanged with another different workpiece engaging portion. A workpiece engaging portion usable with the fastener driving tool includes a positioning mechanism having an opening locating structure and a guiding structure.

Abstract: A fastener driving tool includes a housing assembly with a nosepiece assembly defining a drive track. A safety trip assembly includes a trigger enabling portion and a workpiece engaging portion and is movable between an extended disabling position and a retracted enabling position. The safety trip assembly is biased toward the extended position and is moved toward the retracted position by engagement between a workpiece and the workpiece engaging member. The workpiece engaging portion is movable to permit adjustment of a length of the safety trip assembly. The workpiece engaging portion may be removed from the safety trip assembly and exchanged with another different workpiece engaging portion. A workpiece engaging portion usable with the fastener driving tool includes a positioning mechanism having an opening locating structure and a guiding structure.

Abstract: A fastener driving device including a positioning mechanism for positioning a nail into an opening in a workpiece. The positioning mechanism includes an opening locating structure movably connected to the movable assembly of the contact trip assembly and adapted to extend into the opening so as to align the nosepiece with respect to the opening. The opening locating structure is movable relative the movable assembly of the contact trip assembly between an extended position and a retracted position and biased toward the extended position by a first biasing spring to facilitate locating of the opening, and movable to the retracted position when the opening locating structure is pressed against a workpiece. The positioning mechanism further includes a guiding structure movably connected to the nosepiece structure, the guiding structure being biased by a spring to extend forwardly to guide the fastener in a driving track inside the nosepiece.

Abstract: A fastener driving device includes a housing containing a chamber for storing compressed air a cylinder structure disposed within the housing, a piston movably disposed within the cylinder, a driver connected to the piston, a main valve cooperable with the cylinder structure and movable between an open position and a closed position. The main valve in its open position allows air to move the piston through a drive stroke. The fastener driving device also includes a trigger valve operable between first and second positions. The trigger valve in its first position communicates air pressure from the chamber to the main valve through a signal passageway so as to retain the main valve in a closed position. The trigger valve in its second position allows the air to be exhausted to atmosphere through the signal passageway to permit the main valve to open. The cylinder and the signal passageway comprise an integrally molded structure.

Abstract: A fastener driving device comprises a housing having a chamber constructed and arranged to contain compressed air, a cylinder disposed within the housing, a piston disposed within the cylinder and movable between upper and lower positions within the cylinder, a fastener striker connected with the piston, a main valve and trigger valve. The main valve is formed from a resilient material having a first portion thereof sealingly engaged with a first portion of the cylinder. The main valve has a second portion thereof movable between a sealing position with a second portion of the cylinder and an unsealed position as a result of flexing of the resilient material. The unsealed position permitting the compressed air to force the piston to move from the upper position to the lower position to enable the fastener striker to move through a fastener driving stroke. The trigger valve is carried by the housing.

Abstract: A fastener driving device includes a frame structure providing a handle portion and an adjustable annular exhaust air directing member mounted on the frame structure. The exhaust air directing member allows air displaced during the operation of the device to be directed by a rotational position thereof. A pair of O-rings are provided which act between the exhaust air directing member and the frame structure (1) to ensure that air is discharged into the atmosphere in a direction determined by the rotational position of the exhaust air directing member and (2) to yieldingly retain the exhaust air directing member in any rotational position into which it is manually moved. The frame structure includes a cylinder housing portion integral with the handle portion. A cap member is bolted in sealing relation to the cylinder housing portion and the exhaust air directing member is rotatably mounted to the cap member.

Abstract: A fastener driving device including a sequential activating arrangement in which an enabling member has one end pivotally connected to a trigger member, an opposite end operatively associated with an upper end of an upper structure of a work contact assembly and a central portion disposed below a lower end of an actuating member. When the enabling member and trigger member are in the inoperative limiting positions, thereof movement of the upper structure from the inoperative position thereof into the operative position thereof will move the opposite end of said enabling member through a first arcuate path into a first position. When in the first position, the enabling member is moved into a second position in response to the manual movement of the trigger member into the operative limiting position thereof during which the actuating member is moved into the operative position thereof.

Abstract: A fastener driving device comprising a magazine assembly including a rearward nosepiece portion cooperable with a fixed forward nosepiece portion to define a fastener guiding portion of a fastener drive track of the device. Cooperating guide structure disposed between the magazine assembly to be moved (1) into a normal operating position in a direction to move the rearward nosepiece portion toward a forward nosepiece portion and into cooperating relation together and (2) from said normal operating position in an opposite direction into an intermediate position wherein the nosepiece sections are spaced apart and beyond into separated relation with respect to the frame structure.

Abstract: A fastener driving device including a fastener depth adjusting assembly comprising a rotary adjusting member having an internal threaded section extending along an axis threadedly mounted on one of an upper and lower structures of a work contact assembly so that a rotational movement of the adjusting member with respect to the one structure effects a relative axial movement therebetween. Mounting structure is provided between another of the upper and lower structures and the adjusting member to mount the adjusting member on the another structure so as to be freely rotatable about the axis while being restrained against axial movement with respect thereto. The mounting structure positions the adjusting member so as to present an exterior surface in an accessible exterior position on a frame structure of the device. The exterior surface has a shape facilitating manual rotational movement of the adjusting member by a manual rolling action thereof.

Abstract: A pneumatically operated fastener driving device is provided including an inlet head valve structure mounted within a housing for movement between (1) a closed position sealing a piston chamber from communication with a main air pressure reservoir and (2) an open position enabling the main air pressure reservoir to communicate with the piston chamber, and an outlet head valve structure mounted within the housing for movement separate from the inlet head valve structure between (1) a closed position sealing the piston chamber from communication with an exhaust opening and (2) an open position enabling the piston chamber to communicate with the exhaust opening. The inlet and outlet head valve structures include first and second reservoir pressure responsive surfaces respectively.

Abstract: A portable power operated fastener driving device including a work contact assembly having a manual adjusting mechanism for adjusting the extent to which fasteners driven by the fastener driving element of the device are countersunk into the workpiece. The manual adjusting mechanism includes a manually operable member movable by manual engagement to effect an adjustment of the adjusting mechanism and a releasably lock movable between a locking position for locking the manually operable member against manual movement and a releasing position enabling the manually operable member to be manually moved. A guard assembly encloses at least a portion of the adjusting mechanism including the manually operable member. The guard assembly includes a manually operable access door movable between a closed position wherein the manually operable member is manually inaccessible within the guard assembly and an open position wherein the manually operable member is manually accessible.

Abstract: A fastener driving tool with an improved fastener package supporting magazine canister assembly constructed essentially of three plastic parts: (1) a mounting part, (2) a package supporting part, and (3) a package covering part. A plurality of ledges on the exterior periphery of a portion of a peripheral wall of the supporting part and series of cooperating ledges on the mounting part act as an adjustable mount for releasably fixedly supporting the package supporting part on the mounting part in a selected one of a plurality of different operative positions depending upon the nail size of the package which is selected.