Apparatus and method for changing oil in an internal combustion engine with optional flushing
CA 2104604 A1 · Owner: Van Der Griendt, Andrianus J. · Inventors: Van Der Griendt, Andrianus J.; Bedi, Ram D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A first pump (30) can withdraw waste fluid from an oil pan reservoir and optionally, can be used to introduce flushing fluid through the oil filter (16) and internal oil lubrication distribution passage system, to recirculate the flushing fluid within the internal oil lubrication distribution passage system to withdraw the, waste flushing fluid from the oil pan reservoir for disposal and storage in an external storage receptacle (26). A second pump (32) is provided for supplying fresh motor oil from an external storage receptacle (22) through the oil filter and the internal oil lubrication distribution passage system. Optionally a remote oil, filter and drain mounting bracket (16) …
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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 April 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2013.
- 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.