Retractable gasket valve having two stiffnesses
CA 2084555 A1 · Owner: Societe Europeenne De Propulsion · Inventors: Garceau, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The retractable-gasket ball valve includes sealing means fixed on the valve body, and including, in particular a gasket for providing sealing between the shutter member and the valve body when the shutter member is in a closed position, and further including a slide for causing said sealing means to move between a retracted position which is also a rest position in which the sealing means is spaced spart from the spherical shutter member and a contact position in, which the gasket is pressed against the shutter member. The valve includes a first resilient element of low stiffness which tends to separate the sealing means from the shutter member when the valve is brought to its open position …
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 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 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.