Regeneration circuit
CA 2383669 A1 · Owner: Perkins, Gerald T. · Inventors: Perkins, Gerald T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A regeneration hydraulic circuit which increases the speed of one action of a double action cylinder. The hydraulic circuit includes first hydraulic line in fluid communication with one end of the double action cylinder and a second , hydraulic line in fluid communication with an opposing end of the double action cylinder. A third hyraulic line connects the first hydraulic line and the second hydraulic line. A pilot check valve is disposed in the third hydraulic line, and has a pilot line. The pilot line is connected to the first hydraulic line, wherein the pilot check valve is open when hydraulic fluid flows through the first hydraulic line and into the one end of the double action …
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 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2023.
- 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.