Thread forming joining elements
First Claim
Patent Images
1. A self-drilling screw intended for use in soft fibrous material and comprising:
- a screw head (2);
the screw head connected to a screw shaft (1) with a core diameter;
the screw shaft having a screw tip (3) with a circumferential surface which is tapered from the screw shaft (1) to a point (5);
at least one thread (4) that extends over at least part of the screw shaft (1) to the point (5) of the screw tip (3);
at least one friction edge region (11) the whole of which is located within the region of the screw tip (3), the friction edge region being oriented in the axial direction of the screw; and
the friction edge region being formed by a rib that begins at the point (5) of the screw tip (3) and that extends at least over a height of one lead of the thread (4) on the circumferential surface of the screw tip (3);
whereby the friction edge region cuts said material so that the point (5) can immediately catch to generate axial force during screwing-in of the screw.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention pertains to a thread-forming joining element, in particular, a screw, which comprises a single or multiple thread that extends over at least part of the screw shaft (1), a screw tip (3) and a screw head (2). The thread extends to the point of the screw tip (3), with at least one friction edge region (11) extending over at least part of the length of the screw tip (3) in the longitudinal direction of the screw, namely on the circumferential surface in the region of the screw head (3).
91 Citations
9 Claims
-
1. A self-drilling screw intended for use in soft fibrous material and comprising:
-
a screw head (2); the screw head connected to a screw shaft (1) with a core diameter; the screw shaft having a screw tip (3) with a circumferential surface which is tapered from the screw shaft (1) to a point (5); at least one thread (4) that extends over at least part of the screw shaft (1) to the point (5) of the screw tip (3); at least one friction edge region (11) the whole of which is located within the region of the screw tip (3), the friction edge region being oriented in the axial direction of the screw; and the friction edge region being formed by a rib that begins at the point (5) of the screw tip (3) and that extends at least over a height of one lead of the thread (4) on the circumferential surface of the screw tip (3); whereby the friction edge region cuts said material so that the point (5) can immediately catch to generate axial force during screwing-in of the screw. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification