Dual level gas generator
CA 2318172 A1 · Owner: Atlantic Research Corporation · Inventors: Scheffee, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to allow for at least two different rates of air bag inflation a gas generator (100) is provided with a single pyrotechnic charge (101) which is disposed in a chamber (116) in which argon or a similar type of non-toxic inert gas is stored under pressure. The chamber (116) is closed off by two or more burst discs (118, 120), only one of which is not exposed to a selectively ignitable squib (122). The non-exposed burst disc (118) is arranged to breach when the pyrotechnic charge is ignited and increases the gas pressure in the chamber (116) to a predetermined pressure. Each other disc (120) is arranged to withstand the predetermined pressure and requires weakening by exposure …
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
- Filed January 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2021.
- 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.