Crossing spiral compressor/pump
CA 2317855 A1 · Owner: Bosley, Robert W. · Inventors: Bosley, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crossing spiral compressor or pump having a cylindrical rotor rotating within a, cylindrical stator bore. Both the outer surface of the rotor and the bore of the stator include a, plurality of spiral fluid flow channels separated by narrow blades with the , spiral fluid flow, channels of the stator bore spiraling in the reverse or opposite direction relative to the spiral, fluid flow channels of the rotor. The fluid flow channels on the rotor and in the bore have, open sides that face the annular gap between the rotor and stator with the channels crossing, each other at many locations to facilitate fluid exchange between rotor channels and bore, channels.
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, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2022.
- 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.