Progressive cavity pump
CA 2494444 C · Owner: Bratu, Christian · Inventors: Bratu, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This progressing cavity pump including a helical rotor (2) mounted to turn inside a helical stator (3) said stator (3) and said rotor (2) being disposed such that the cavities (4) formed between said rotor (2) and said stator (3) move from the inlet (5) towards the outlet (6) is characterized by the fact that hydraulic regulation (HR) means are provided for obtaining internal recirculation of the pumped fluid between at least two of said cavities (4) under conditions capable of performing at least one function selected from: achieving the desired pressure distribution along the pump stabilizing the temperatures, controlling the leakage flow rates and compensating for the volumes of …
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 January 19, 2005 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.