Boring or penetrating the earth – Bit or bit element – Core forming type
Reexamination Certificate
2007-05-22
2007-05-22
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Core forming type
C408S23900A, C408S141000
Reexamination Certificate
active
10723743
ABSTRACT:
A tool holder (1) for an annular core bit has a bit-side axial stop surface (4) and an end-side axial splined profile (3) extending in a bit direction. The tool holder has an outer thread (5) forming radial spline projections of the splined profile (3) that cooperates with the inner profile (12) of the core bit.
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Bagnell David
Hilti Aktiengesellschaft
Stephenson Daniel P
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