Impact wrench

Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool

Patent

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Details

173 93, B25D 1500

Patent

active

048117978

ABSTRACT:
An impact wrench has a casing accommodating rotatable anvil and shaft, the shaft supporting a hammer having a body with longitudinally extending passages in which pins are received for axial reciprocations which pins are engaged with the anvil in one position. A driving member received in an axial passage of the hammer body is coupled to the shaft to perform rotation and axial movement, the driving member being connected to the hammer body for rotation together therewith, and cooperating with a spring for moving the pins into a position, in which they are engaged with the anvil. The longitudinally extending passages open into the axial passage of the hammer body. Each pin has a bearing surface engageable with a respective bearing surface of the driving member during movement of the pins into the other position, the bearing surface being located on a portion of each pin protruding into the axial passage of the hammer body.

REFERENCES:
patent: 3175660 (1965-03-01), Kaman
patent: 3228486 (1966-01-01), Kaman et al.
patent: 3578091 (1971-05-01), States

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