F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 13/00 (2006.01) B44C 7/02 (2006.01) E04F 13/04 (2006.01) E04F 13/08 (2006.01) F16B 13/12 (2006.01)
Patent
CA 2049351
Abstract The invention concerns a multi-part dowel with an outer body (2), which has an approximately cylindrical shank (4) and an inner body (12). In the position of use, the outer body (2) and inner body (12) engage with each other in the same way as a multiple screw-thread. The outer body (2) has, in its solid shaft (4), helical grooves (8) which are positioned to form a star when viewed in cross-section and which form an internal screw- thread. The inner body (12) has matching helical ribs (14) also positioned to form a star. The pitch of the thread is greater than the length of the thread. In what is the front section of the outer body (2) when the dowel is used, the grooves themselves, or slots (10) aligned with them, extend to the outer wall of the outer body (2). The dowel can be used for fixing building materials, such as woven textile or fibre-glass materials, to outside walls, interior walls or ceilings. The dowel makes it possible to align the material in a single plane. To this end, the inner body (12) can be displaced relative to the outer body (2). When it is penetrated by the inner body (12), the front section of the outer body (2) is expanded in the same way as a straddling dowel. Ventilation channels (30) run the whole length of the dowel.
Kirby Eades Gale Baker
Oldendorf Gunter
LandOfFree
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