A driving tool includes a housing having a support shaft for operably supporting an operating member, a contacting member which is capable of contacting and separating from a workpiece into which a fastener is to be driven, and which operates by contacting the workpiece, a pressure chamber to which and from which a compressible gas is supplied and discharged, a striking part operating in a direction to strike the fastener, a gas supply mechanism, and a transmission control member for controlling the operation of the gas supply mechanism, said operation being based on the operation of at least one of the operating member and the contacting member or the operation of both of them, wherein the fastener is struck when an operating force is applied to the operating member and to the transmission control member, and the contacting member is operated.

A driving tool includes a housing having a support shaft for operably supporting an operating member, a contacting member which is capable of contacting and separating from a workpiece into which a fastener is to be driven, and which operates by contacting the workpiece, a pressure chamber to which and from which a compressible gas is supplied and discharged, a striking part operating in a direction to strike the fastener, a gas supply mechanism, and a transmission control member for controlling the operation of the gas supply mechanism, said operation being based on the operation of at least one of the operating member and the contacting member or the operation of both of them, wherein the fastener is struck when an operating force is applied to the operating member and to the transmission control member, and the contacting member is operated.

A fastener driving tool that forces air from its variable venting volume beneath the piston of the working cylinder and directs that forced air through passageways and toward an electronic controller and/or an electric motor before being vented to atmosphere, thereby drawing heat away from those components during an operational cycle of the movable piston. When the piston returns to its initial position, environmental air is drawn through the same passageways, again past the electronic controller and/or electric motor, thereby twice cooling these “hot” components during a single operational cycle.

A fastener driving tool that forces air from its variable venting volume beneath the piston of the working cylinder and directs that forced air through passageways and toward an electronic controller and/or an electric motor before being vented to atmosphere, thereby drawing heat away from those components during an operational cycle of the movable piston. When the piston returns to its initial position, environmental air is drawn through the same passageways, again past the electronic controller and/or electric motor, thereby twice cooling these “hot” components during a single operational cycle.

A powered fastener driver includes a driver blade movable from a top-dead-center position to a bottom-dead-center position for driving a fastener into a workpiece, a drive unit for providing torque to move the driver blade toward the top-dead-center position, and a rotary lifter engageable with the driver blade. The lifter having a body and a drive pin coupled to the body. A roller is positioned on the drive pin and engages with a tooth of the driver blade when moving the driver blade from the bottom-dead-center position toward the top-dead-center position. The roller includes a first engagement section that receives an end portion of the tooth and a second engagement section. An engagement member engages the second engagement section for aligning the first engagement section of the roller with the end portion of the tooth to facilitate meshing between the end portion of the tooth and the roller.

A powered fastener driver includes a driver blade movable from a top-dead-center (TDC) position toward a driven or bottom-dead-center (BDC) position, a gas spring mechanism for driving the driver blade toward the BDC position, a lifter assembly having a rotary lifter for returning the driver blade from the BDC position toward the TDC position, and an arm upon which the rotary lifter is supported. The fastener driver also includes a motor which, in a first position of the rotary lifter, provides torque to the rotary lifter to return the driver blade from the BDC position toward the TDC position. The fastener driver further includes a brake mechanism which, when activated, redirects torque from the motor away from the rotary lifter and toward the arm, causing the lifter assembly to move from the first position toward a second position in which the rotary lifter is not engageable with the driver blade.

A power tool includes a tool housing and a mechanism disposed inside the tool housing. The tool housing has a composite structure that includes an outer layer and an inner layer. The outer layer provides an outer surface of the power tool housing and comprises a first material. The outer layer is an assembly of concave shell portions joined along parting lines. The inner layer is disposed on an inner surface of at least a portion of the outer layer so as to be disposed between the portion of the outer layer and the mechanism. The inner layer comprises a second material. The first material has a density that is at least three times the density of the second material. The inner layer has a peripheral edges that are offset relative to the parting lines such that the inner layer extends continuously across the parting lines.

The invention relates to a pneumatic nailer having a working piston, which is connected to a driving ram for driving a fastener and to which compressed air is applied when triggering a driving process, a trigger and a contact sensor, the common actuation of which can trigger a driving process, a safety device, which has a control volume and which is designed to automatically undertake a safety measure when a pressure threshold in the control volume is exceeded or not met. The control volume is ventilated or vented via a throttle such that a delay time, after the expiration of which the pressure threshold is exceeded or not met. is specified by a volume of the control volume and an opening cross-section of the throttle. The control volume has a volume in the range from 0.5 ml to 20 ml and the throttle is a bore having a diameter in the range from 30 μm to 200 μm.

The invention relates to a pneumatic nailer having a working piston, which is connected to a driving ram for driving a fastener and to which compressed air is applied when triggering a driving process, a trigger and a contact sensor, the common actuation of which can trigger a driving process, a safety device, which has a control volume and which is designed to automatically undertake a safety measure when a pressure threshold in the control volume is exceeded or not met. The control volume is ventilated or vented via a throttle such that a delay time, after the expiration of which the pressure threshold is exceeded or not met. is specified by a volume of the control volume and an opening cross-section of the throttle. The control volume has a volume in the range from 0.5 ml to 20 ml and the throttle is a bore having a diameter in the range from 30 μm to 200 μm.

A driving device capable of reducing the load in any of the plurality of engaging members is provided. The driving device includes an ejection unit to which a fastener is supplied, a striking unit configured to strike the fastener, a rack provided on the striking unit, a wheel provided rotatably, and a plurality of pins provided on the wheel and engaged with and released from the rack, wherein the plurality of pins can change positions in the wheel, and the plurality of pins include a pin located at a first position where the pin can be engaged with the rack and a pin which is located behind the pin in a rotation direction of the wheel and located at a second position where the pin cannot be engaged with the rack when the striking unit is actuated in the direction of striking the fastener.