Drilling tool with an exchangeable feed helix
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United States of America Patent
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-
Aug 1, 1989
Grant Date -
N/A
app pub date -
Oct 2, 1987
filing date -
Oct 18, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The drilling tool proposed serves for making perforations and is equipped with an exchangeable feed helix. To prevent the feed helix from being damaged if the drilling tool becomes tilted or if the feed helix is jammed, the feed helix can execute a specific stroke by means of a supporting spring, in such a way that the drill shank can rotate freely relative to the feed helix.
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Cited Art Landscape
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