Exhaust gas recirculation system
CA 1069785 A · Owner: Nissan Motor Co. Ltd. · Inventors: Aoyama, Syunichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure regulating unit modulates the vacuum present in the vacuum chamber of a vacuum motor operatively connected to an EGR control valve, in response to the pressure differential between the pressure in the EGR passage, between a restriction and the EGR control valve and the pressure immediately downstream of a restriction in the exhaust conduit, the latter restriction being located downstream of the junction of the EGR passage and the exhaust conduit. - 1 -
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.