Rock drill head

Details Rock drill head Rock drill head

2005-01-25

2005-01-25

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

C175S414000, C175S320000

Reexamination Certificate

active

06845827

ABSTRACT:
A drill head for rock drilling comprising cutting edges (1) made of hard material, which is detachably connected axially, over a bearing surface (3), with a drilling shaft (4) with at least one radially projecting driver blade (5a, 5b, 5c) by a bayonet-type connection slot (6a, 6b, 6c), wherein at least one connection slot (6a, 6b, 6c) is present, which forms two axially opposing undercuts (7a, 7b), within which the driver blade (5a, 5b, 5c) has limited axial movement.

REFERENCES:
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patent: 4474488 (1984-10-01), Pinkerton et al.
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patent: 4941783 (1990-07-01), Maier
patent: 6021855 (2000-02-01), Beccu et al.
patent: 3130221 (1982-06-01), None
patent: 782840 (1997-07-01), None
patent: 2094853 (1982-09-01), None
patent: 2385869 (2003-09-01), None

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