Rock drilling tool for rotational percussive machining of concrete, rock, masonry and such materials
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United States of America Patent
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Dec 1, 2015
Grant Date -
May 9, 2013
app pub date -
Nov 23, 2010
filing date -
Dec 30, 2009
priority date (Note) -
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Abstract
A rock drilling tool includes a drilling head provided with a cutting body and a helix arranged between the drilling head and a shaft. The cutting body extends continuously over a nominal diameter of the rock drilling tool and has an inner region configured as a centering tip and an outer region bordering the centering tip in the radial direction. The outer region is offset towards the rear in relation to the centering tip in the active direction of the rock drilling tool. The centering tip is configured as a pyramid or a truncated pyramid and has pyramidal edges with lateral surfaces located therebetween. At least one lateral surface of the centering tip is configured as a cavity.
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