Thread forming screw for forming an internal thread in a low duc

Details Thread forming screw for forming an internal thread in a low duc Thread forming screw for forming an internal thread in a low duc

1992-12-08

1994-08-23

Lindsey, Rodney M.

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

Having structure to restrict rotation of threaded, mating...

Comprising a thread lock

411411, 411423, F16B 3930

Patent

active

053402545

ABSTRACT:
A thread forming screw for cold forming, using primarily compressive forces, internal threads in a workpiece comprised of a low ductility material, such as magnesium and the like, comprises a shank having an entering end and a head end. External threads are disposed on the shank between the entering end and the head end. The external threads define an angular configuration with the angular configuration defining an angle measuring substantially within the range of ninety degrees to one hundred and twenty degrees.

REFERENCES:
patent: 2254503 (1941-09-01), Thomas et al.
patent: 3504722 (1970-04-01), Breed
patent: 3530760 (1970-09-01), Lindstrand
patent: 3643543 (1972-02-01), Gutshall
patent: 3662643 (1972-05-01), Scheffer
patent: 3935785 (1976-02-01), Lathom
patent: 3942406 (1976-03-01), Egner
patent: 4040327 (1977-08-01), Otaki
patent: 4544313 (1985-10-01), Grossberndt
patent: 4652194 (1987-03-01), Tajima et al.
patent: 5088869 (1992-02-01), Greenslade

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