Claims
- 1. A portable impact tool driver configured for removable attachment to a drive spindle of a power tool, comprising:
- a body member removably connectable to a rotational drive member of a power tool;
- a drive shaft operably configured with said body member so as to be rotationally driven therewith;
- a hammer member rotationally coupled to said drive shaft so as to be rotationally driven thereby, said hammer member axially movable along said drive shaft, said hammer member further comprising a first impact face configured thereon with at least two impact drivers defined on said impact face;
- a coupling drive mechanism operably disposed between said drive shaft and said hammer member to impart rotational and longitudinal movement to said hammer member;
- an anvil member comprising a second impact face opposite said first impact face with an impact receiver configured thereon for periodic impacting engagement with said impact drivers, said anvil member further comprising means for connecting a tool or working device thereto;
- wherein said hammer member is rotationally driven by said drive shaft while simultaneously moved axially back and forth relative to said drive shaft so that said impact drivers move into and out of rotational impacting engagement with said impact receiver; and
- wherein said drive shaft further comprises first and second sections and an elastomeric coupling disposed between and drivingly engaged with said two sections to rotationally couple said two sections, said coupling formed substantially of an elastomeric material so as to reduce vibrations transmitted from said hammer member to said body member or power tool.
- 2. The impact tool driver as in claim 1, wherein said first section of said drive shaft is formed integral with said body member.
- 3. The impact tool driver as in claim 1, further comprising a sleeve member housing said drive shaft, said hammer member, and said anvil member.
- 4. The impact tool driver as in claim 1, further comprising a biasing member axially biasing said hammer member into engagement with said anvil member.
- 5. The impact tool driver as in claim 1, wherein said coupling drive mechanism comprises a helical groove defined in said drive shaft and a complimenting radially opposite groove defined in said hammer member, and a drive ball disposed in said grooves wherein said helical groove and drive ball impart rotational and axial movement to said hammer member as said drive shaft rotates.
- 6. The impact tool driver as in claim 1, wherein said impact drivers comprise circumferentially spaced lugs defined on said first impact face, and said impact receiver comprises corresponding protruding members defined on said second impact face with circumferential recesses defined between said protruding members, said lugs axially movable into and out of said circumferential recesses for periodic rotational engagement with said protruding members as said drive shaft rotates.
- 7. The impact tool driver as in claim 6, wherein two radially opposite said lugs defined on said first impact face, and said protruding members comprise radially opposite legs defined on said second impact face.
- 8. The impact tool driver as in claim 1, wherein said body member comprises a longitudinally extending shank configured to be held by a chuck device.
- 9. The impact tool driver as in claim 1, wherein said body member comprises a threaded longitudinally extending shank configured for threaded engagement with a drive spindle.
- 10. The impact tool driver as in claim 1, wherein said hammer member comprises an annular groove defined on a face thereof opposite said first impact face, and a spring disposed within said annular groove biasing said hammer member axially towards said anvil member.
- 11. The impact tool driver as in claim 1, wherein said elastomeric coupling comprises rotational drive dogs in engagement with drive dogs defined in opposite faces of said first and second drive shaft sections.
- 12. The impact tool driver as in claim 1, wherein said elastomeric coupling comprises is formed integrally with opposite faces of said first and second drive shaft sections.
- 13. The impact tool driver as in claim 12, wherein said elastomeric coupling is molded with said first and second drive shaft sections.
- 14. A portable impact tool adapter configured removable attachment to a portable power tool to convert said power tool to an impact tool, said adapter comprising:
- a body member configured to be removably mounted to a drive spindle of a power tool;
- a sleeve member attached to said body member and surrounding at least a portion thereof;
- a hammer member disposed within said sleeve member rotationally coupled to said body member and axially movable relative thereto, said hammer member comprising a front face having drive lugs configured thereon;
- an anvil member disposed adjacent said hammer member and having a back face with driven lugs configured thereon, said anvil member further comprising means for receiving a tool or work device;
- a biasing element operationally disposed to bias said hammer member towards said anvil member;
- means for transferring rotational movement of said body member to rotational and axial movement of said hammer member so that said drive lugs move axially into and out of impacting rotational engagement with said driven lugs as said body member is rotated and
- wherein said body member further comprises a first shaft section and a second shaft section, and an elastomeric coupling disposed between and rotationally coupling said first and second shaft sections so as to reduce vibrations imparted by said hammer member to the power tool.
- 15. The adapter as in claim 14, wherein said means for transferring comprises a ball residing in circumferential grooves defined in said body member and said hammer member, at least one of said grooves having a longitudinal component so as to generate axial movement of said hammer member.
- 16. The adapter as in claim 15, wherein one of said body member shaft sections comprises a longitudinal shaft portion extending through said hammer member, said hammer member axially movable back and forth along said shaft portion, said ball and grooves disposed in the region of said shaft portion.
- 17. The adapter as in claim 14, further comprising drive dogs rotationally connecting said elastomeric coupling and said shaft sections.
- 18. The adapter as in claim 14, wherein said coupling is formed integral with said first and second shaft sections.
Parent Case Info
The present application is a Continuation-in-Part Application of U.S. application Ser. No. 08/908,777, filed on Aug. 8, 1997 now abandoned.
US Referenced Citations (17)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
908777 |
Aug 1997 |
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