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US 2025/0188976 A1Published application
Timber Concrete Composite Screw
AssigneeHilti Aktiengesellschaft
InventorRoland SCHNEIDER
Life of this patent
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Abstract
A screw includes a shank which has a tip end and a rear end. A concrete thread and a timber thread are disposed on the shank. The concrete thread and the timber thread are helically aligned with one another and the concrete thread reaches further to the tip end than the timber thread. The timber thread has an engagement zone which includes at least one turn of the timber thread and, in the engagement zone, the timber thread becomes wider with decreasing distance from the rear end.
Claims7
-6. (canceled)
A screw, comprising:
- a shank (10) which has a tip end (11) and a rear end (13);
- a concrete thread (20) disposed on the shank (10);
- and
- a timber thread (30) disposed on the shank (10);
- wherein the concrete thread (20) and the timber thread (30) are helically aligned with one another and wherein the concrete thread (20) reaches further to the tip end (11) than the timber thread (30);
- wherein the timber thread (30) has an engagement zone (38) which includes at least one turn of the timber thread (30) and wherein in the engagement zone (38) the timber thread (30) becomes wider with decreasing distance from the rear end (13).
3 more elements
Dependencies are inferred from the claim text.