Hydraulic ram pump
CA 2249263 C · Owner: Obermoser, Karl · Inventors: Obermoser, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a hydraulic ram pump comprising: a propulsion water , line fed with propulsion water (at 30) a delivery line (at 32) which can be , connected to delivery water via a bottom valve (4) a ram pump valve (3) which , is connected to the propulsion water line (1) and delivery line (2) the , propulsion water flowing into the delivery line when the ram pump valve (3) is open and, after the closing of the ram pump valve the water column flowing , further in the delivery line sucking in delivery water via the bottom valve (4), the ram pump valve (3) being held by spring force in its closed position separating the propulsion water line from the delivery line and a pressure …
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 April 16, 1997 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2019.
- 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.