Process and apparatus for controlling a hydraulic lift
CA 2128946 C · Owner: Johansson, Kjell · Inventors: Johansson, Kjell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process and apparatus for controlling a hydraulic lift wherein with this process a direct approach to a floor can be achieved without requiring a creeping velocity drive whereby the car is controlled in a position-dependent manner during the deceleration phase for the purpose of which a control region is formed which is subdivided into percentage values the percentage values being retained in tabular form with reference to measured actual position values and upon input of a specific actual position value the corresponding percentage value is multiplied with the value of the control region (CS) and to this product eventually are added a control deviation (CO) and a pilot control signal (SO) …
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 27, 1994 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2016.
- 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.