B - Operations – Transporting – 25 – C
Patent
B - Operations, Transporting
25
C
1/23
B25C 5/16 (2006.01) B25C 1/06 (2006.01)
Patent
CA 1184701
ABSTRACT OF THE DISCLOSURE 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 pine 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 strokes are one-half the 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.
398963
Black & Decker Inc.
Gowling Lafleur Henderson Llp
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