Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation
Patent
1992-09-02
1994-03-22
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Pilot end having means enhancing fastening or installation
411411, 411914, F16B 2500
Patent
active
052957748
ABSTRACT:
A screw of the self-drilling and self-tapping kind intended to be used in fastening corrugated or similar cladding to a support structure is disclosed. The screw shank is provided with a feature, such as, for example, a circumferential series of axially extending ribs, which is operable to enlarge (such as, for example, by means of a reaming process) a hole formed through the cladding by means of the drilling tip of the screw. The hole enlarging feature is positioned at or adjacent to the junction defined between a threaded section of the shank and a non-threaded section which extends from the screw head. The hole enlarging feature is arranged so as to ensure that the aforementioned hole, as enlarged, has a diameter which is not less than that of the non-threaded section of the shank. There is also disclosed a method of forming such a screw in which the thread is formed by means of a thread rolling operation, and the thread rolling die is modified so as to automatically produce the hole enlarging feature upon the screw shank during the course of the thread rolling operation.
REFERENCES:
patent: 3355205 (1967-11-01), Wagner et al.
patent: 3478639 (1969-11-01), Gruca
patent: 3827331 (1974-08-01), Muenchinger
patent: 3869219 (1975-03-01), Wilson et al.
patent: 4091173 (1978-05-01), Hage
patent: 4157674 (1979-06-01), Carlson et al.
patent: 4653244 (1987-03-01), Farrell
patent: 4730970 (1988-03-01), Hyner et al.
patent: 4797022 (1989-01-01), Crigger
patent: 4802807 (1989-02-01), Offenburger et al.
patent: 5015134 (1991-05-01), Gotoh
Lindsey Rodney M.
W. A. Deutsher Pty. Ltd.
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