Patent
1975-07-18
1976-03-16
Lanham, C. W.
10 86R, 85 32CS, B21D 5324, B21K 164
Patent
active
039435873
ABSTRACT:
A method of manufacturing threaded nuts comprises providing a hollow nut casing having the desired geometrical nut profile and having at least one radial slit extending the length of the nut casing so as to render the nut casing inwardly contractible. A coil spring insert is formed with the inner edges of the coils defining a screw thread and the coil spring insert is inserted into the hollow opening in the nut casing. Then radial pressure is applied to the hollow nut casing so as to deform and inwardly contract the nut casing so that it is compressed about the coil spring insert and while in this state, the coil spring insert is welded to the nut casing to form a unitary threaded nut. The welding can be carried out by spot welding, friction welding, electronic welding or other available welding techniques so as to integrate the coil spring insert and nut casing into a one-piece threaded nut article.
REFERENCES:
patent: 1490123 (1924-04-01), Murray
patent: 1630958 (1927-05-01), Mauch
patent: 2079746 (1937-05-01), Morgan
patent: 2199007 (1940-04-01), Oldham
patent: 2407879 (1946-09-01), Haas
patent: 2616474 (1952-11-01), Healy
patent: 3272250 (1966-09-01), Hattan
Adams Bruce L.
Burns Robert E.
Combs E. M.
Lanham C. W.
Lobato Emmanuel J.
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