Cantilever spring mount for sliding gate valve and method
CA 2044381 C · Owner: Flo-Con Systems, Inc. · Inventors: King, Patrick D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of providing a cantilever spring or a beam which is attached to the frame of a sliding gate valve is disclosed. The apparatus comprises a cantilever spring which is essentially flat and rectangular. A spring mount is provided to anchor the head end of the spring to permit the other end to flex against a load application member or the underneath side of the lower refractory member such as a tube holder and tube. The spring itself has a heel portion and a cantilever portion. At one end of the spring provision is made for a working face which engages the underneath. portion of the lower refractory plate.
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 June 12, 1991 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2013.
- 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.