Valve device having stationary and movable or turnable valve bodies
CA 2084374 A1 · Owner: Skyllingstad, Olav · Inventors: Sontvedt, Terje; Skyllingstad, Olav; Nokleberg, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an erosion resistant pressure reduction valve or, choke comprising a valve housing (1,22) defining a valve chamber (2) connected with an inlet (3) and outlet (4), a, stationary first valve body (6,17) arranged in the chamber, and a second, valve body (7,18). The second valve body is arranged so as to be turnable or, displaceable relative to the first valve body by means of a spindle or the like (14,23). The first and second valve, bodies are each provided with corresponding flow-through apertures, (19,28). Flow through the valve is regulated by turning or displacing the turnable/displaceable second valve body relative to the first. The apertures in the valve bodies …
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 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 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.