Fluid proportioning apparatus
CA 1080173 A · Owner: Sundstrom, Karl E. · Inventors: Sundstrom, Karl E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A proportioning apparatus has a cylindrical container with a smooth internal surface and communicating with a fluid passage, and a plunger axially displaceable within the container for displacing fluid along the passage. A digitally controlled drive system rotates and simultaneously axially displaces the plunger in the container, thereby counteracting stiction between the cylinder internal surface and an annular sealing member sealing the plunger to the surface, the sealing member being fixed relative to the plunger and slidable relative to the container internal surface. The plunger has a thread with a cutting edge which cuts a slit in the container internal surface and the sealing member …
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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
- Granted June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
- 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.