| 摘要 |
This invention relates to a portable, hand-held shearing implement, which includes a pair of cutting blades employing a motor powered mechanism to apply the cutting force. The invention is particularly adaptable for an implement to execute individual, deliberate, cutting strokes. One version may be powered by an electric motor or a self-contained internal combustion engine, driving through a gear reduction train to a reciprocatory mechanism having threaded means with a releasable coupling to drive the power stroke. Another version employs a controllable reversing switch to effect the reciprocative action and is limited to an electric motor drive. In the former version, reopening of the blades is spring actuated with provision included to soften the impact of termination, and includes a triggering means to stop and hold the reciprocative action after each cycle until released by trigger actuation.
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