Adjustable relief valves and pressure cookers incorporating such valves
CA 1067789 A · Owner: Prestige Group Limited (The) · Inventors: Rossi-Ashton, Alan G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adjustable relief valve. The valve comprises a valve member and a valve seating one of which acts against the other under the pressure of a predetermined weight to close a valve port. A removable weight can be added to the predetermined weight to vary the closing pressure. The removable weight is of annular shape and is located by a bayonet-type connection on a boss connected to the valve member or the valve seating.
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
- Granted December 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 11, 1996.
- 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.