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A fastener tool having a housing in which is mounted a universal motor to be continuously operated during operation of the tool. A gear driven by the motor is a rotary driven member. A drive pin is carried by the gear to rotate therewith and is free to be shifted axially relative the gear. A drive b

A fastener tool having a housing in which is mounted a universal motor to be continuously operated during operation of the tool. A gear driven by the motor is a rotary driven member. A drive pin is carried by the gear to rotate therewith and is free to be shifted axially relative the gear. A drive bar is mounted in the housing to drive fasteners. The drive pin is connectable to the drive bar to produce a power stroke and a return stroke. An interrupt mechanism is operative to prevent successive power strokes, and in the preferred embodiment it will include the drive pin; it will act to disconnect the drive pin from the drive bar. Also the interrupt mechanism will control the connection of the drive pin and drive bar. The maximum number of power strokes are one-half the number of rotary cycles of the rotary driven member. The interrupt mechanism includes a linkage for sensing workpiece engagement and operator actuation of the tool, each of which are required to produce a single power stroke. The interrupt mechanism may also include a track and shifter to axially shift the drive pin. The drive bar has a slot which in a start position is aligned to receive or release the pin during a predetermined 45°arc of gear rotation. A detent will yieldly hold the drive bar in the start position.

대표청구항 ▼

A fastener tool system, comprising: (a) a source of rotational energy connected to the tool, and said source rotatable through a first cycle; (b) a fastener to be driven by the tool; (c) a drive member moveable in the tool through a second cycle defined by a power stroke to drive the fastener and a

A fastener tool system, comprising: (a) a source of rotational energy connected to the tool, and said source rotatable through a first cycle; (b) a fastener to be driven by the tool; (c) a drive member moveable in the tool through a second cycle defined by a power stroke to drive the fastener and a return stroke, (d) means in the tool for linking the source of rotational energy to the drive member to drive the drive member through the power stroke and the return stroke, said means further including means for terminating successive second cycles while the source of rotational energy is continuously rotated.