Section for the manufacture of hollow body elements, hollow...

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...

Reexamination Certificate

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C411S179000

Reexamination Certificate

active

06986629

ABSTRACT:
A section (10; 110) is provided for the manufacture of hollow body elements, in particular for the manufacture of pierce and rivet nuts having a square or rectangular outline in plan view and a ring-like piercing section (36; 236) at a side confronting a component consisting of a sheet metal material or the like. The section (10; 210) is at least substantially rectangular in cross-section with two bars (14, 16; 214, 216) at the side (12; 212) later confronting the component. The bars are spaced apart and extend parallel to the longitudinal sides (18, 20; 218, 220) of the section, are likewise at least substantially rectangular in cross-section and form, in the finished element (11, 211), a feature providing security against rotation. The bars respectively each have an inclined flank (68, 70; 268, 270) at the inner side which forms an undercut (69, 71; 269, 271). The specification also describes and claims hollow body elements made from such a section and component assemblies formed by attaching such hollow body elements to sheet metal parts.

REFERENCES:
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patent: 2486769 (1949-11-01), Watson
patent: 3253631 (1966-05-01), Reusser
patent: 3469613 (1969-09-01), Steward
patent: 3878598 (1975-04-01), Steward
patent: 3878599 (1975-04-01), Ladouceur et al.
patent: 3926236 (1975-12-01), Pouch et al.
patent: 3999659 (1976-12-01), Grube
patent: 4690599 (1987-09-01), Shinjo
patent: 5340251 (1994-08-01), Takahashi et al.
patent: 6220804 (2001-04-01), Pamer et al.
patent: 6276040 (2001-08-01), Muller
patent: WO 01/72449 (2001-10-01), None

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