Screw, method and rolling die for the production thereof

Details Screw, method and rolling die for the production thereof Screw, method and rolling die for the production thereof

1992-08-19

1994-04-19

Lindsey, Rodney M.

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

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

Thread or shank structure

411387, 411411, F16B 3504

Patent

active

053040244

ABSTRACT:
A screw has a thread (3), whose front and rear flanks have a different angle with respect to the screw longitudinal axis. The screw tip (2) can contain a scraping groove (6), which extends as a notch in the screw longitudinal direction. In the front, conically tapering area of the screw the thread course is constructed symmetrically and extends up to the tip.

REFERENCES:
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patent: 2021704 (1932-01-01), Thatcher et al.
patent: 2428783 (1947-10-01), Cole
patent: 2827820 (1958-03-01), Vellier
patent: 3083609 (1963-04-01), Lovisek
patent: 3183531 (1965-05-01), McKewan
patent: 3748949 (1973-07-01), Dreger
patent: 3794092 (1974-02-01), Carlson et al.
patent: 3942405 (1976-03-01), Wagner
patent: 4255959 (1981-03-01), Muenchinger
patent: 4329099 (1982-05-01), Shimizu et al.
patent: 4527932 (1985-07-01), Onasch et al.
patent: 4742663 (1988-05-01), Demers
Kunststoffe, 74 (Jul. 1984) Juli, No. 7, Munchen, Deutschland.

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