Multiple-strand torsion spring

Details Multiple-strand torsion spring Multiple-strand torsion spring

1988-11-21

1989-12-26

Eley, Timothy V.

Spring devices

Coil

Plural, one within another

267180, 267289, 267290, F16F 106

Patent

active

048893277

ABSTRACT:
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: 3905403 (1975-09-01), Smith et al.

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