Rock drill head
AssigneeHilti Aktiengesellschaft
InventorsMartin Richter, Udo Hauptmann, Stefen Gotzfried, Werner Kleine
Life of this patent
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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.
Claims7
A drill head for rock drilling comprising hard cutting edges (1) and being 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 an associated bayonet-type connection slot (6a, 6b, 6c), wherein at least one connection slot (6a, 6b, 6c) forms two axially opposing undercuts (7a, 7b) within which the driver blade (5a, 5b, 5c) has limited axial movement.
A drill head for rock drilling comprising hard cutting edges (1) and being 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 an associated bayonet-type connection slot (6a, 6b, 6c), wherein at least one of a second driver blade (5a, 5b, 5c) and a second connection slot (6a, 6b, 6c) is arranged varying from an integer rotational symmetry with regard to at least one of shape and disposition.
Dependencies are inferred from the claim text.