Mufflers for use with engine retarders; and methods
CA 2318534 A1 · Owner: Wagner, Wayne M. · Inventors: Wiegandt, Ted J.; Hiemstra, John; Stenersen, Eivind
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A muffler (1) is described for muffling both positive power and compression brake type engine retarders. The muffler includes an outer shell (3) defining an internal volume (45). A first, inner perforated wall (57) is spaced from , the outer shell and defines a first annular, volume (55) therebetween. A , first volume of packing material (59) is positioned within the annular volume. An inlet tube (6) is oriented within the internal volume. In certain embodiments, the inner perforated wall circumscribes at least a portion of the inlet tube, and extends a distance of at least 25 % of the axial length of the outer wall. Both single and dual muffler systems are described. Methods of use …
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
- Filed February 11, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2021.
- 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.