Procedure and apparatus for triggering the safety gear of an elevator
CA 2124971 C · Owner: Kone Oy · Inventors: Korhonen, Helge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A procedure and an apparatus for triggering the safety gear of an elevator at a speed lower than the gripping speed includes an overspeed governor of the elevator having a pulley driven by the safety gear rope and a brake comprising centrifugal weights eccentric cams and, a brake disc. At a speed lower than the normal gripping (or triggering) speed, using a separately controlled solenoid attached to the overspeed governor the brake is, caused to engage the pulley by driving the plunger of the solenoid into the path of rubber rollers rotating with the centrifugal weights.
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 June 2, 1994 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 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.