Hand held rotary impact tool

A rotary impact tool comprising a shaft, an anvil member on said shaft for providing rotary motion to a tool body, a striker non-rotatably and axially slidably mounted on said shaft for applying impact forces to said anvil member by axial movement of said striker on said shaft, complementary inclined striking surfaces on said anvil member and said striker, respectively, means permitting selective rotational movement of said anvil member relative to said shaft whereby the respective striking surfaces of said anvil member and said striker can be mutually orientated so that an axial impact of said striker against said anvil member applies a rotational force to said anvil member, and biasing means urging said anvil member into a position on said shaft which provides engagement of the respective striking surfaces producing a rotational force on said anvil member upon impact by said striker.

A rotary impact tool having an elongate mounting member, an anvil member associated with the mounting member for providing rotary motion to a tool body, and a striker for applying impact forces to said anvil member by movement of said striker lengthwise with respect to said mounting member, said anvil member and striker having complementary inclined surfaces for providing rotation of the anvil upon impact by the striker, wherein said striker is non-rotatable relative to said mounting member and said anvil member has means providing limited rotational movement of the anvil member relative to said mounting member between a pair of predetermined terminal positions, in at least one of which positions the respective surfaces on the striker and anvil member are mutually oriented so that an axial impact of the striker against the anvil member applies a rotational force to the anvil member.

A rotary impact tool having an elongate mounting member, an anvil member associated with the mounting member for providing rotary motion to a tool body, and a striker for applying impact forces to said anvil member by movement of said striker lengthwise with respect to said mounting member, said anvil member and striker having complementary inclined surfaces for providing rotation of the anvil upon impact by the striker, wherein said striker is non-rotatable relative to said mounting member and said anvil member has selective rotational movement relative to said mounting member between a pair of terminal positions, in at least one of which positions the respective surfaces on the striker and anvil member are mutually oriented so that an axial impact of the striker against the anvil member applies a rotational force to the anvil member, the tool including biasing means for selectively urging the anvil member into one or other of said terminal positions.