Gas flow check valve for bottle filling device
CA 2078153 A1 · Owner: Monnig, Leonard W. · Inventors: Monnig, Leonard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas flow check valve for a bottle filling device employs a piston received within a bore which is maintained at the bottom of the filling head vent tube. The piston has a head thereon which is interposed within the flow path of escaping gas during the filling operation. The escaping gas impinges upon the underside of the head and urges the same toward a sealing position. An opposite end of the piston extends downwardly into the bottle being filled. When the level of the beverage within the bottle reaches the bottom of the piston the buoyancyof the piston, coupled with the forces of the escaping gas impinging upon the piston head urge the piston into sealing engagement terminating the …
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 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 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.