Arrangement for active sound damping
CA 2136293 A1 · Owner: Geisenberger, Stefan · Inventors: Geisenberger, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is known in the state of the art to dampen noise emissions by means of "anti-sound". In the gas exhaust installations of combustion machines, this is realized most often in that the exhaust gas flowing in the gas exhaust installation is charged with "anti-sound" produced by loudspeakers (12). However such, arrangements are disadvantageous in that the flow of hot exhaust gases reduces the service life of the loudspeakers, or that such measures are insufficient for actively damping the sound. The invention therefore presents an arrangement that avoids the disadvantages that exist in the state of the art. According to the invention, this is achieved in that the gas exhaust tube (10) ends 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 November 21, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2016.
- 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.