Method and apparatus for forming a barrel coil spring
CA 1333355 C · Owner: Rockwell International Suspension Systems Company · Inventors: Lienert, Gerold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are disclosed for forming a barrel coil spring(10). The apparatus according to the invention has a rotatable head(24), and clamping device(44 46) to attach an end, of the coil spring to the rotatable head a forming die head(34), with at least one forming die(58) which may be inserted between adjacent coils of the spring near the second end such that a forming die bears against an inner surface of a coil a first rotating device, to rotate the head in a first direction about an axis substantially parallel to a longitudinal axis of the coil spring and a second rotating, device to rotate the forming die head in a second direction opposite, to that of the first direction …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 6, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.