Bidirectional cryogenic valves
CA 1233807 A · Owner: Bfm Energy Products Corp. · Inventors: Stock, Richard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bidirectional valve useful at all temperatures from cryogenic to extreme fire temperatures. The sealing means for the bidirectional valve comprises a metallic sealing element having a pair of spaced sealing lobes defined thereon which are coated with a Teflon compound. A third sealing lobe is defined on the metallic sealing element between the pair of sealing lobes and is constructed solely of metal. The pair of coated sealing lobes further function as wipers to prevent sand dirt or, similar foreign particles from becoming crushed between the valve disc and metallic sealing lobe during the final closing of the valve. When the valve is exposed to fire conditions, the Teflon coated sealing …
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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 March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
- 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.