Elevator with vertical vibration compensation
CA 2540755 C · Owner: Husmann, Josef · Inventors: Husmann, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an elevator comprising a car (1) arranged to travel along guide rails (6) within a hoistway (8) and a main drive (52,54,56,DMC) to propel the car (1). A sensor (30;40) is mounted on the car (1) to measure a vertical travel parameter (Vc;Ac) of the car (1) a comparator (32) compares the sensed car travel parameter (Vc;Ac) with a reference value (Vr;Ar) derived from the main drive (52,54,56,DMC) and an auxiliary motor (24) is mounted on the car (1) to exert a vertical force (F) on at least one of the guide rails (6) in response to an error signal (Ve;Ae) output from the comparator (32).
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 March 22, 2006 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.