Automatic ventilator
CA 1308623 C · Owner: Fangrow, Thomas F. Jr. · Inventors: Fangrow, Thomas F. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention A patient demand valve is automatically cycled open to provide selected volumes of oxygen at selected intervals. A pneumatic controller connected to an oxygen supply provides a control pressure to operate the demand valve with the cycling provided by pneumatic timers. The oxygen supply to the patient is also through the controller to the demand valve. A tidal volume flow control valve provides an adjustable flow rate when open. In one embodiment the, patient demand valve is in an assembly which includes a safety subassembly, which incorporates a signaling device that indicates an over-pressure condition in the assembly as a result of a blockage of gas flow to the …
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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.