| 摘要 |
An impact hand tool particularly adapted for driving a threaded fastener and for applying an axial impact to the fastener when needed to facilitate starting the fastener or to overcome binding thereof. The tool includes an elongate, tubular body portion having an elongate bit extending axially from one end thereof. The bit is mounted for axial sliding movement relative to the body portion and an impact hammer is provided interiorly of the body portion adapted for movement toward and away from the bit. A spring is provided for biasing the impact hammer toward and into engagement with the bit, and a pair of finger-engageable arms are provided extending from the impact hammer to facilitate moving the hammer against the force of the spring and to a cocked position. Upon subsequent release of the impact hammer from the cocked position, the hammer is thrust by the spring into engagement with the bit to force the bit outwardly from the hollow body portion and impart an impact to the fastener.
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