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An air impact tool features as followings. An impact piston assemblied inside the impact tool body is actuated by compressed air to continuously vibrate the chisel assemblied at the end of the impact tool body. There is one tool spring having one U-frame fastener which fixes the fasten flange of the chisel, one opening next to the U-frame fastener, and spring coils. And the tool spring is rotariblly connected to the ring which is freely rotariblly on the impact tool body.
TW82109966A1993-10-071993-11-26An air impact tool
TW225495B
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