Helical hydraulic pump
CA 2049778 A1 · Owner: Marino, Giovani · Inventors: Marino, Giovani
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary pump capable of slow movement for wave power applications. The pump is a helix formed of tubing whereby when the helix is rotated the inlet end of the tubing scoops water and an outlet end of the tubing directed along the central longitudinal axis of the helix delivery liquid to a conduit means. The helix of tubing is preferably mounted on a shaft which is turned by ratchet means powered by rocking motion or rise and fall of water due to wave motion.
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 August 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2013.
- 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.