Welding method and apparatus
CA 1303147 C · Owner: Hidaka, Masato · Inventors: Hidaka, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an electric welding method and apparatus using resilient means such as springs for supporting a work to be welded. The work can be set at a desired level at which required welding is to be effected, by yieldingly compressing the springs with an upper electrode on the work until the work has been lowered to the desired level. If the work is thick or stiff, the work can be lowered simply by pushing down the work with the upper electrode against the resilient force of the springs. If the work is thin or easy to bend or deform, the work must be lowered by pulling down the work table and the work together with the aid of an appropriate pull-down piston-and-cylinder. Exact …
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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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.