Fuel return valve
CA 2483179 C · Owner: Tesma Motoren-Und Getriebetechnik Gmbh · Inventors: Palvoelgyi, Sandor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fuel return valve comprises a housing (1) and a closing unit (2) a first passage (4), which is line-connected to a fuel pump a second passage (5), which is line-connected to an internal combustion engine and a third passage (6), which is line-connected to the fuel tank as well as a pressure chamber (8, 16), being formed in the housing which pressure chamber is in communication with the first passage (4) and, via the closing unit (2), with the third passage (6). To make a valve of this type maintenance-free and simple and inexpensive to produce a) the closing unit (2) is a piston (25) which is guided in the housing attachment (20) and is pressed by a spring (19) arranged and supported in …
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 30, 2004 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2026.
- 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.