Low pressure check valve
CA 2071554 A1 · Owner: Atkinson, Gordon E. · Inventors: Boehmer, Dennis A.; Bailey, James C.; Atkinson, Gordon E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve assembly (10) is disclosed for allowing fluid flow in a first direction and preventing fluid flow in a second direction. The valve assembly (10) includes a housing for enclosing a substantially circular regulator assembly (16) which extends diametrically across the housing. The regulator assembly (16) comprises a hub portion (24) which is positioned centrally within the housing and connecting members (26) which extend radially toward a rim portion (22) which is supported by the housing. The hub portion (24) supports a disk-shaped substantially inflexible portion of the regulator assembly (16) which extends over the connecting members (26) to engage the rim portion (22) and thereby …
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 January 3, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 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.