Fuel supply system with high turn down ratio
CA 2103338 C · Owner: Coltec Industries Inc. · Inventors: Danyluk, Paul R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fuel injection system for an internal combustion engine such, as a dual fuel diesel/gas engine of the type requiring an overall system turn-down ratio capability, from maximum fuel flow rate to minimum flow rate, on the order of 100 to 1 employs a conventional, variable displacement primary pump having a turn-down ratio substantially less than the overall system ratio. The output of the primary pump branches to supply two parallel fuel conduit paths. Each path includes a pressure actuated shut-off valve means. The primary shut off valve means path opens to permit flow through the path to the engine at pressures in excess of a relatively high value. The secondary valve means opens to …
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 November 17, 1993 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2015.
- 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.