Multiple-strand torsion spring and method of forming the same

Details Multiple-strand torsion spring and method of forming the same Multiple-strand torsion spring and method of forming the same

1988-03-15

1989-04-18

Eley, Timothy V.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29411, 29417, 29456, B21F 3500

Patent

active

048213900

ABSTRACT:
A method of forming a helical spring composed of a plurality of parallel, coiled strands of spring wire with such strands being unconnected along most of their length but being joined together at least at one end of the spring. In a preferred embodiment, such strands or wires are welded together at opposite ends of the spring. Such a spring is formed by incrementally advancing a plurality of wires in contiguous, parallel relation towards a wire-coiling station and then, at the termination of a coiling step, interrupting such advancement to sever the wires through, or immediately adjacent to, a first welded zone while at the same time welding such wires together in a second zone spaced a precise distance from the point of the severing operation.

REFERENCES:
patent: 2670797 (1954-03-01), Armentrout
patent: 2845693 (1958-08-01), Shetterly et al.
patent: 4682394 (1987-07-01), Wells et al.

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