Tightening structure using high-strength self-forming screws

Details Tightening structure using high-strength self-forming screws Tightening structure using high-strength self-forming screws

2011-05-10

2011-05-10

Estremsky, Gary (Department: 3677)

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

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

Pilot end having means enhancing fastening or installation

C411S411000

Reexamination Certificate

active

07938609

ABSTRACT:
The present invention provides a tightening structure with which a reduction in processing steps is achieved without modifying the shape of a partner member an improvements in bolt strength and fatigue strength are achieved, and with which the fitting length of a thread ridge is not altered greatly in comparison with a conventional tightening structure such that a size reduction can be achieved, thereby contributing greatly to a reduction in the weight of a vehicle.

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