Patent EA-001024-B1 (EA)
Title: Connecting element for connecting at least two wooden construction parts and a joint plate
Inventor: MATTLE PAUL
IPC: E04B1/26
Filed: 1998-06-02
Abstract: 1. A connecting element with a substantially rod-like shank for joining at least two wooden structural members and at least one joint plate, especially of the type that can be inserted into one or more - slot(s) of the wooden structural members, and preferably made of metal, characterized in that the rod-like shank (10) is provided at least at one of its ends with a boring part (11) and at its other end with a tool drive (12, 16) for rotary motion, the diameter (D2) of the shank (10) corresponding at least approximately to the boring diameter (D1) of the boring part (11) at least over one or more partial regions of its length, and in that means for securing against axial displacement in the inserted condition are formed on the shank (10) at the end remote from the boring part (11). 2. A connecting element according to claim 1, characterized in that one or more flutes (13) is or are formed on the boring part (11) and possibly on a portion of the rod-like shank {10) adjoining the boring part (11). 3. A connecting element according to claim 1, characterized in that a portion (14) with diameter (D3) smaller than that of the boring part (11) directly adjoins the boring part (11). 4. A connecting element according to one of claims 1 to 3, characterized in that a further boring portion (20) with boring diameter larger than that of the first boring part (11 ) is formed on the rod-like shank (10) offset at an axial distance from the boring part (11). 5. A connecting element according to claim 2, characterized in khat one or more flute(s) (13) is or are extended over a large part of the length or over the entire length of the rod-like shank (10). 6. A connecting element according to one of claims 1 to 5, characterized in that a thread (15) or a thread-like structure is provided at least over a partial region of the length of the rod-like shank (10). 7. A connecting element according to one of claims 1 to 5, characterized in that a roughened surface, knurling or the like is provided or raised structures or depressions are formed at least over a partial region of the length of the rod-like shank (10). 8. A connecting element according to one of claims 1 to 7, characterized in that the end of the rod-like shank (10) remote from the boring part (11) has flaring frustoconical shape. 9. A connecting element according to claim 3, characterized in that one or more flute(s) (13) is or are formed on the portion of the rod-like shank (10) which follows the portion (14) of reduced diameter (D3) and which is adapted at least approximately to the boring diameter (D1). 10. A connecting element according to one of claims 1 to 9, characterized in that the tool drive is formed as an internal drive (12). 11. A connecting element according to one of claims 1 to 9, characterized in that the tool drive is formed as an external drive (16). 12. A connecting element according to claim 4, characterized in that the further boring portion (20) with boring diameter larger than that of the first boring part (11) is followed on the rod-like shank (10) by a substantially cylindrical portion with diameter (D4) slightly smaller than that of the further boring portion (20). 13. A connecting element according to one of claims 1 to 12, characterized in that one or more helical flute(s) (13) is or are provided. 14. A connecting element according to one of claims 1 to 12, characterized in that one or more flute(s)  (13) is or are disposed parallel to the axis.