Intake manifold
CA 2024877 C · Owner: Akiyoshi, Hitoshi · Inventors: Akiyoshi, Hitoshi; Sukimoto, Minobu; Ogawa, Seiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intake manifold comprises an aluminum plenum chamber having an air inlet and a plurality of air outlets and a plurality of branch pipes of wrought aluminium connected to the respective air outlets of the plenum chamber and each having an inner peripheral surface of circular cross section. At least one of the branch pipes is deformed at a lengthwise intermediate portion thereof to avoid contact with adjacent the branch pipes. The cross sectional contour of the inner peripheral surface of the deformed portion is in the form of a closed curve having no straight portion and the cross sectional, area of the deformed portion is approximately equal to the cross sectional area of the circular …
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 September 7, 1990 and granted June 1, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2012.
- 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.