Multiple line hydraulic system flush valve
CA 2285409 A1 · Owner: Hickey, Kurt A. · Inventors: Hamilton, Mark D.; Leggett, Nigel; Hickey, Kurt A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flush valve for a multiple line hydraulic system includes a bifurcated manifold, the bifurcation being provided by a piston actuatable hydraulically mechanically, electrically magnetically or by fiber optic means. The piston or gate is, provided with a port extending diametrically therethrough and oriented to become, coaxial with an inlet and outlet of the manifold upon actuation of the piston. With the, port aligned, the hydraulic fluid in the system can be displaced by fresh fluid. The, piston is then deactivated which results in the port becoming misaligned with the inlet, and outlet of the manifold. In this condition the hydraulic system is again sealed and, functions normally.
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 October 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2021.
- 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.