Methods and apparatus for supplying gas under high pressure to weldable air bag vessels with a gas passage formed therein, and like products, and then weld-sealing the passage
CA 2082732 C · Owner: Richardson, Ronald W. · Inventors: Richardson, Ronald W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for supplying an inert gas under extreme pressure to a weldable air bag canister having a gas-charging opening in one end wall, and weld sealing the opening. The canister, and a composite welding head and weld ball supplying assembly, having a lower nose with a seal surrounding a ball dispensing opening therein are, relatively moved axially to seal off the opening in the canister end wall. Then, prior to pressurizing the assembly, an individual ball is presupplied through a passageway seal system to a ball delivery member inboard of the seals which axe provided in the welding head and weld ball supplying assembly. Thereafter the composite assembly is charged with gas …
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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
- Filed November 12, 1992 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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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.