Pressure relief valve with thermal trigger and movable seal plug
CA 2125865 A1 · Owner: Wass, Lloyd G. · Inventors: Wass, Lloyd G.; Baird, Michael R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermally activated pressure relief valve (10) includes a valve housing (12) with an opening (28) communicating with an interior of a pressure vessel, and a passage (78) from the opening (28) through a cavity (20) of the housing (12) to an outlet (26). A, seal plug (14) within the cavity (20) creates a seal (116) of the passage (78). A thermal trigger (18) engages the seal plug (14) to maintain the seal (116) when a temperature adjacent to the housing (12) is below a predetermined value. When the temperature reaches the predetermined value, the thermal trigger (18) releases the seal plug (14), thereby breaking the seal (116) and exposing a flow path between the opening (28) and outlet …
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 December 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 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.
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.