Hydraulic valve clearance compensation arrangement for an internal combustion engine
CA 2074414 C · Owner: Carl Freudenberg · Inventors: Budde, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic valve clearance compensating arrangement for an internal combustion engine includes a clearance compensating element which is axially movable up and down in a cylindrical lifter guide. The element includes first and second hollow cylinders which are mutually sealed and axially elastically supported on each other by a compression spring. A substantially cup shaped housing concentrically surrounds the cylinders. The housing has a flat housing base and at least one lubricant delivery opening in its outer circumference. The first hollow cylinder and the lubricant delivery opening are connected for the exchange of liquid. The lubricant delivery opening is provided with a first check …
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 July 22, 1992 and granted October 25, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2014.
- 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.