Packless silencer
CA 1137877 A · Owner: Industrial Acoustics Company, Inc. · Inventors: Morgan, James A.; Hirschorn, Martin; Ingard, Uno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The construction described is a resistive sheet type of duct liner or duct silencer; i.e. a liner or silencer in which acoustical flow resistance is concentrated in a thin face sheet separating the flow passage and acoustical cavity rather than in an acoustically absorptive packing material filling the acoustical cavity. The invention disclosed is means for applying inexpensive perforated facings similar to, to those in a conventional packed silencer to provide re-, sistive sheets which are effective in terms of noise dissipation and in terms of self-noise (noise generated by flow through the flow passages).
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
- Granted December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.