Methods and apparatus for forming fasteners and threaded connect

Details Methods and apparatus for forming fasteners and threaded connect Methods and apparatus for forming fasteners and threaded connect

1991-02-26

1992-02-11

Eley, Timothy V.

10 1A, 72137, 72168, B21D 5320

Patent

active

050865323

ABSTRACT:
The present invention is a method of forming on a fastener body by relative rotary and axial movement of a thread forming tool and the body, a thread having a pitch which changes progressively through a plurality of turns, and an apparatus for progressively deforming an elongated element having a predetermined initial cross section to the form of a coil defining an internal thread and having a progressively changing cross section giving the thread a progressively changing pitch.

REFERENCES:
patent: 2358707 (1944-09-01), Haas
patent: 2845986 (1958-08-01), Larsen et al.
patent: 3181236 (1965-05-01), Garland
patent: 3646793 (1972-03-01), Teraoka
patent: 4491003 (1985-01-01), Messick et al.

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