Threaded – headed fastener – or washer making: process and apparat – Process – Assembling or disassembling fastener with element
Patent
1992-02-03
1994-05-03
Wilson, Neill R.
Threaded, headed fastener, or washer making: process and apparat
Process
Assembling or disassembling fastener with element
411368, 411533, B21H 302, F16B 4300, B21D 5320
Patent
active
053082850
ABSTRACT:
A method for fabricating a fastener and washer assembly wherein the washer is permanently retained on the fastener by an annular raised portion on the shank of the fastener. The annular raised portion and the inner diameter of the washer are mutually formed so as to promote elastic deformation of both the raised portion and the washer when the washer is forced over the raised portion to be retained on the fastener. The method allows the fastener and the washer to be fully fabricated and processed prior to assembly, including such desirable steps as heat treating and plating of both the fastener and the washer. The annular raised portion is formed by a pair of converging annular surfaces which define a predetermined diameter. The washer has an inner diameter surface having a pair of chamfered edges. The washer is assembled onto the shank of the fastener by forcing the chamfered edge of the washer against and past the annular raised portion. the inner diameter is sized relative to the diameter of the annular raised portion such that it is elastically, and not plastically, expanded while the annular raised portion is elastically compressed as the washer is forced over the annular raised portion. Thereafter, both the washer and the annular raised portion elastically revert back to their respective diameters. The washer is permanently retained on the fastener by the raised portion to form the fastener and washer assembly.
REFERENCES:
patent: 1262975 (1918-04-01), Pierce
patent: 1868415 (1932-07-01), Gundersen et al.
patent: 2192322 (1940-03-01), Mitchell
patent: 2283494 (1942-05-01), Erdman
patent: 2303224 (1942-11-01), Olson
patent: 2792578 (1957-05-01), Autio
patent: 2914780 (1959-12-01), Poupitch
patent: 3687184 (1972-08-01), Wagner
patent: 3837212 (1974-09-01), Gutshall
patent: 3862458 (1975-01-01), Stanaitis
patent: 3981170 (1976-09-01), Barth et al.
Deason William
Malen Gerald
Muschella Joseph
The Cold Heading Company
VanOphem Remy J.
Wilson Neill R.
LandOfFree
Method of making a bolt and washer assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making a bolt and washer assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a bolt and washer assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2111484