Fastener and screw means therefor

Details Fastener and screw means therefor Fastener and screw means therefor

1997-01-29

1998-06-09

Larson, Lowell A.

Threaded, headed fastener, or washer making: process and apparat

Process

Making internally threaded fastener, e.g., nut

470 25, 470 87, 470106, 72404, B21D 5324

Patent

active

057625603

ABSTRACT:
The fastener comprises, in combination, a screw having a threaded shaft, and a fastening strip or sheet having a raised portion provided with an aperture being preformed to have an at least partly helical threadform-defining edge shaped and dimensioned to matingly receive the threaded shaft of the screw means. The crests comprising the threaded shaft of the screw means have an asymmetrical surface profile in the axial direction of the threaded shaft which enables the shaft to withstand greater applied torque.

REFERENCES:
patent: 935817 (1909-07-01), Dzus
patent: 1411184 (1922-03-01), Rosenberg
patent: 2090125 (1937-08-01), Hower
patent: 2150852 (1939-03-01), Tinnerman
patent: 2169057 (1939-08-01), Place
patent: 2171773 (1939-09-01), Von Mertens
patent: 2172258 (1939-09-01), Place
patent: 2383133 (1945-08-01), Kost
patent: 3124191 (1964-03-01), Forslund
patent: 3491646 (1970-01-01), Tinnerman
patent: 4659246 (1987-04-01), Sugiyama
patent: 4836007 (1989-06-01), Saccoccio

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