Fastening element
AssigneeHilti Aktiengesellschaft
InventorsRene Ortler, Sven Dietze
Life of this patent
Estimating the term…
Abstract
A fastening element has a head (14), a stem (11) adjoining the head (14) and having a tip at its end remote from the head (14), a first spherical section (21) extending from the tip (13) in the direction of the head (14) and a second section (22) adjoining the first section (21) and extending in the direction of the head (14), and a thread profile (15) provided on the stem (11) and having, on the second section (22), a constant steep gradient with a lead angle (β2) from 50° to 74° and, on the first section (21), a gradient that increases from the lead angle (β2) of the second section (22) toward the tip (13), with a lead angle (β1) at a half of a length between the tip (13) and the end (24) of the first section (21) remote from the tip (13) amounting to at least 75°.
Claims8
A fastening element, comprising a stem (11) having a tip (13) at one end thereof;
- a head (14) arranged at an end of the stem (11) opposite the tip (13), the stem (11) having a first spherical section (21) extending from the tip (13) in a direction of the head (14), and a second section (22) adjoining the first section (21) at an end of the first section (24) remote from the tip (13) and extending in the direction of the head (14);
- and a thread profile (15) provided on the stem (11), the thread profile (15) having, on the second section (22), a constant steep gradient with a lead angle (β2) from 50° to 74° and, on the first section (21), a gradient that increases from the lead angle (β2) of the second section (22) toward the tip (13), with a lead angle (β1) at a half of a length between the tip (13) and the end (24) of the first section (21) remote from the tip (13) amounting to at least 75°.
Dependencies are inferred from the claim text.