Ball valve
CA 2079426 A1 · Owner: Biggers, John Caleb Wells · Inventors: Biggers, John Caleb Wells; Brock, Henry George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve assembly for use in association with a water tap having a valve seat (17) located in a passageway between a fluid inlet (15) and a fluid outlet (16) and having an axially recessed spindle (18) adapted for movement toward and away from the valve seat, said valve assembly comprising a resiliently deformable spherical sealing member (11) and a, plunger member (10) for moving said sealing member against said valve seat, said plunger member including a stem (14) for location within the spindle recess, and a helical spring (12) which extends between the valve seat and a portion of the tap through which the spindle extends.
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 September 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 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.