Method and apparatus for determining set pressure of pilot operated pressure relief valve
CA 2061908 C · Owner: Danzy, Roger Dale · Inventors: Danzy, Roger Dale
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A testing system for a pilot operated, pressure relief valve of the type wherein, movement of the pilot in response to a predetermined line pressure effects the opening of the, pressure relief valve comprising a portable apparatus including a source of test fluid pressure, a flow regulating test valve connected to the test pressure source and a piston in the test valve, movable in response to the rate of fluid flow through the test valve. The output end of the, test valve is connected to a two branch lien one branch line connecting the , test valve to the inlet passage of the pilot and the other branch line connecting the test valve to a trapped fluid, pressure chamber of the relief …
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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
- Filed February 26, 1992 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.
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.