Method of improving the landing of a hydraulic elevator car
CA 2010244 C · Owner: Inventio Ag · Inventors: Blain, Jeffrey William; Stern, Lawrence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of improving the landing of a hydraulic elevator car which responds to slowdown and leveling indicia associated with each floor of a building served by the car. The method, which utilizes signals which are already generated relative to the car traveling past slowdown and leveling indicia, provides an optimum deceleration time TOPT for the car to initiate deceleration and arrive at a leveling zone of a target floor defined by leveling indicia. The method further delays the initiation of deceleration of the car after the car, reaches slowdown indicia far the target floor by a, predetermined time delay Td. The method determines the actual time TACT for the car to travel between …
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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 February 16, 1990 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2012.
- 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.