Manufacture of coil springs
AssigneeSpringform Technology Limited
InventorIan James Whitworth
Life of this patent
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Abstract
An apparatus is disclosed for the manufacture of a coil spring from a wire. The apparatus comprises first and second tools for contacting the wire prior to, and/or during, deformation of the wire into a coil spring. The apparatus includes means for applying an electrical potential difference between the first and second tools such that an electric current is caused to flow through at least part of the wire during use.
Claims37
Apparatus for the manufacture of a coil spring from a wire, the apparatus comprising:
- first and second tools for contacting the wire prior to deformation of the wire into a coil spring, the first and second tools being tools that play a role in formation of the coil spring, wherein the apparatus includes means for applying an electrical potential difference between the first and second tools, such that an electric current is caused to flow through at least part of the wire, during use.
(canceled)
Apparatus as claimed in claim 7, wherein the wire has a temperature during deformation into the coil spring that is sufficient to improve one or both of the resilience and resistance to fatigue of the coil spring.
(canceled)
-34. (canceled)
Dependencies are inferred from the claim text.