Method of manufacturing a butterfly valve
CA 1060188 A · Owner: Allis-Chalmers Corporation · Inventors: Goldman, Holliday L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of manufacturing a butterfly valve from plate steel which comprises flame cutting the outer configuration of the valve body and flame cutting a circular disc from the center of the body resulting in a water opening through the body and utilizing the disc as the closure member. The valve is constructed in such a manner that no castings or welding is required.
Read the whole patent
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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 1996.
- 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.