Drilling tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 26, 1991
Grant Date -
N/A
app pub date -
Jul 12, 1989
filing date -
Jul 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A drilling tool which is suitable especially for clearing drill dust from a drillhole in rock-drilling work is provided. For this purpose, the spiral shank has brush elements (6, 17) which are arranged in the groove bottom of a conventional drilling tool or which themselves form spiral feed coils.
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