Self-tapping screw for composite materials

Details Self-tapping screw for composite materials Self-tapping screw for composite materials

2006-05-02

2006-05-02

Saether, Flemming (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Thread or shank structure

C411S399000

Reexamination Certificate

active

07037059

ABSTRACT:
In accordance with an embodiment of the invention the threads of the two thread sections have an opposite pitch. Further, chips are reduced in that the tip of the screw near the thread section has been configured as a multiple screw-thread, in particular a double screw-thread, where the pitch of the threads of the multiple screw-thread is greater than the pitch of the single screw-thread of the thread section near the head of the screw.

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patent: 2 169 051 (1986-07-01), None
patent: WO 99/15796 (1999-04-01), None

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