Atmospheric compensating automatic air release valve
CA 2058686 C · Owner: Valve And Primer Corporation · Inventors: Di Lorenzo, Ralph; Sabalvaro, Vincent M. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an air release valve and more particularly to an atmospheric compensating automatic air release valve. The invention features a valve including a second orifice which is exposed to atmosphere but always shut whereby a valve mechanism in the valve is exposed to forces which are equal and opposite to a suction force which tends to hold the valve mechanism in sealing relation to the first air release, orifice. By providing first and second orifices in accordance with the present invention, then, movement of the valve float downwardly as the liquid level goes down will cause the air vent orifice to open irrespective of the pressure within the valve. Thus the automatic …
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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 January 2, 1992 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 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.