Method for the production of a screw, and screw produced...

Details Method for the production of a screw, and screw produced... Method for the production of a screw, and screw produced...

2003-12-17

2009-12-15

Saether, Flemming (Department: 3677)

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

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

Head driving structure

C148S587000, C148S336000, C420S095000

Reexamination Certificate

active

07632053

ABSTRACT:
A screw (1) having a head (2), a shaft (4) that includes a thread (5), and an interior engaging member (3) in the head is provided. The screw (1) is produced from an ultra-high strength steel using a cold forming method.

REFERENCES:
patent: 960244 (1910-06-01), Allen
patent: 1244125 (1917-10-01), Parish
patent: 1978371 (1934-10-01), Purtell
patent: 2084079 (1937-06-01), Clark
patent: 2182092 (1939-12-01), O'Leary
patent: 2977838 (1961-04-01), Oestereicher
patent: 3304561 (1967-02-01), Ellsworth
patent: 3811872 (1974-05-01), Snape
patent: 3904445 (1975-09-01), Gallagher, Jr.
patent: 29 29 179 (1980-01-01), None
patent: 1 535 775 (1978-12-01), None
patent: 2 337 477 (1999-11-01), None
patent: WO 94/13842 (1994-06-01), None
ASM Handbooks Online, “Maraging Steels”, 2002.
Handbuch der Fertigungstechnik, Umformen, Carl Hanser Verlag München Wien, 1987 pp. 968-970.

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