Adjustable proportional throttle-valve with feedback
CA 2054367 C · Owner: Hydrolux S.A.R.L. · Inventors: Schwelm, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The throttle-part of the valve comprises a two-way seat valve with a follow-up throttle, piston. A differential guide piston allows to position the follow-up throttle piston via an edge, control system. The differential guide piston is biased via a spring in a pressure-spring, compartment in the direction of the closed position of the edge control system. A proportional, directional control valve which is actuated by a magnet, allows to pressurise or depressurise the, pressure-spring compartment via a pilot line A whilst the position of the , guide piston is determined by an inductive displacement transducer.
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 28, 1991 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 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.