Thread-cutting apparatus with reversal of direction of rotation
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United States of America Patent
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Jan 22, 2002
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N/A
app pub date -
Jan 19, 2000
filing date -
May 28, 1997
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Abstract
A thread-cutting apparatus with reversal of the direction of rotation with a sun-and-planet gear with an axially displaceable reversing device for reversing the direction of rotation of a drill, held in the grip of a spindle, which can be pulled out preferably against a length equalization spring after a given drilling head depth has been reached, especially reversing chucks with pressure equalization pipelines, which discharge into an equalization chamber, sealed by a movable wall from the outside air, wherein the reversing device is actuated by an external driving element, which can be actuated by a reversing signal generated by an actuator.
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