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US 11,577,429 B2Granted
Manufacturing process, tool stand, and drill bit
AssigneeHilti Aktiengesellschaft
InventorsGuenter Domani, Carsten Peters, Florian Schroeder
Life of this patent
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Abstract
A drill bit includes a drill bit head, a multi-strand helix made up of three or more helix ribs, and a shank end along a drill bit axis. The multi-strand helix is made up of a conveyance area, a helix gradient, and a pitch. The helix ribs extend parallel to the drill bit axis in a first area adjacent to the drill bit head and a second area adjacent to the shank end.
Claims7
A drill bit, comprising:
- a drill bit head, a multi-strand helix made up of three or more helix ribs, and a shank end along a drill bit axis;
- wherein the multi-strand helix is made up of a conveyance area, an attachment area, a discharge area, a helix gradient, and a pitch, wherein the attachment area is disposed between the drill bit head and the conveyance area and wherein the discharge area is disposed between the conveyance area and the shank end;
- wherein the helix ribs extend parallel to the drill bit axis in the attachment area and the discharge area;
- wherein the helix gradient constantly increases in size in a direction of the drill bit head in the attachment area with a rate between 0.25 degrees and 2 degrees for every degree that the helix ribs wind around the drill bit axis.
1 more element
Dependencies are inferred from the claim text.