Gas flow control in a ventilator
CA 2579086 C · Owner: Cewers, Goeran · Inventors: Cewers, Goeran
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ventilator or fluid delivery system that provides a flow of gas to an airway of a user. The ventilator includes a source of gas (30 32), a conduit (63, 65, 42) that carries the flow of gas to the airway of a patient a first valve , (38, 40) that controls a pressure flow, or volume, of the flow of gas, a pressure sensor (46) operatively coupled to the conduit between the valve and the patient and adapted to monitor a pressure of the gas in the conduit and a , controller (50) adapted to control the valve based on an output of the pressure sensor. The ventilator further includes a restrictor (62) provided in the conduit between the pressure sensor and the patient. The restrictor in , …
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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 1, 2005 and granted August 12, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 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.