Compensation and rope elongation arrangement
CA 2120545 C · Owner: Kone Oy · Inventors: De Jong, Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an elevator system comprising an elevator car a counterweight, a set of elevator suspension ropes on which the elevator car and the counterweight are suspended a, traction sheave whose motion is transmitted via the suspension ropes to the elevator car and to the counterweight a, compensating system includes a set of compensating ropes connected to the elevator car and the counterweight via at least one diverting pulley. A vertically adjustable buffer arrangement mounted in conjunction with the counterweight allows the system to compensate for changes in the length of the suspension and compensating ropes. The suspension ratio of the compensating ropes is an integer multiple (i.e. 1 2, 3 …
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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 April 5, 1994 and granted December 2, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 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.