Valve arrangement for liquid dispensing device
CA 2024914 C · Owner: Tetra Alfa Holdings S.A. · Inventors: Rodrigue, John; Stainbrook, Marlan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve arrangement for a liquid dispensing unit includes a discharge nozzle having a central bore the, bore having a central axis, an inner wall and an edge, forming a valve seat; a movable valve element cooperating with the bore to control liquid flow out of the nozzle; the valve element including a valve stem extending along the central axis; a device for reciprocally moving the valve element along the central axis; a valve base mounted at the end of the valve stem for contacting the valve seat to seal closed the nozzle the valve base including a shear step at the outer circumferential edge thereof, and a seal area adjacent the shear step for contacting the valve seat for shutting off …
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 7, 1990 and granted February 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2012.
- 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.