Artificial ventilator
CA 1294841 C · Owner: Yagata, Kazuhiko · Inventors: Yagata, Kazuhiko; Noguchi, Yasuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An artificial ventilator includes a dome for covering the precordial and the sides of the thoracoabdominal of a patient, a blower to be used for applying negative and positive pressures within the dome a, regulator for adjusting a pressure, and the like. The valve switching device is controlled by a respiration detection system. In the respiration detection system a, pyroelectric element is used as a respiratory sensor for detecting a temperature change rate caused by an inspired and expired air flow. The temperature change rate signal obtained by the sensor is compared with a threshold value set by a variable resistor, the start timings of expired air and inspired air are detected 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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.