Positively controlled ball valve
CA 2263182 C · Owner: Nilsson, Lennart · Inventors: Nilsson, Lennart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A positively controlled ball valve for flowing fluids in particular water, for instance for use in snow making machines and comprising a valve housing , (1) having a flow passageway (3) for the water (7) a valve seat (9) arranged , in said flow passageway (3) and a valve ball (10) which is movable towards and from said valve seat (9), and a force actuation means (4) having a piston rod (20) for positively acting on said valve ball (10) which is movable in a , race (11) in the valve housing (1) which race extends from the valve seat (9) obliquely outwards-rearwards, upstream the flow of water (7) and in which the , force actuation means (4) is formed with a piston rod (20) arranged for …
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 11, 1997 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2019.
- 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.