Concentric pneumatic/hydraulic power feed apparatus
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United States of America Patent
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-
Apr 20, 2004
Grant Date -
Nov 6, 2003
app pub date -
May 1, 2002
filing date -
May 1, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A power feed apparatus for applying a thrust force to an output shaft of a motor driven tool to drive the output shaft linearly towards and away from a workpiece without applying off-axis forces to the output shaft that would cause it to move out of perfect perpendicular alignment to the outer surface of the workpiece. The apparatus includes a first tubular member which is fixedly secured to a jig or other like mounting structure associated with the workpiece. A second tubular member is disposed for sliding linear movement along the first tubular member. Spaced apart annular fluid chambers are formed within the apparatus along with associated fluid ports for allowing a pressurized fluid to be used to both extend and retract the output shaft of the tool. The tool itself is supported on the second tubular member and thus moves linearly along with the second tubular member.
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