Rotary disc pump
CA 2086554 C · Owner: Gruth, Max I. · Inventors: Gruth, Max I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary disc pump (10) comprises an outer housing (12) with an inner cylindrical rotor chamber (14) having an inlet (18) at one end and an outlet (20) at its outer periphery. A rotor assembly in the chamber comprises at least two parallel spaced discs (22,24) disposed co-axially in the chamber and connected together for rotation about their center axis. The inner opposing faces of the discs are spaced a predetermined distance apart and a series of raised , ribs or vanes (34 35) are provided on at least one of, the opposing faces with the vane height being less than the disc spacing to leave a clearance between the opposing disc surfaces.
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 July 2, 1990 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.