Elevator drive having a traction sheave integrated with, and smaller than the rotor
CA 2126493 C · Owner: Aulanko, Esko · Inventors: Aulanko, Esko; Hakala, Harri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The elevator machinery comprises a motor and its traction sheave. The rotor is disc-shaped and an air gap between it and the stator forms a plane which is substantially perpendicular to the shaft. The stator forms a ring-like sector and is placed in an outer part and the traction sheave is fixed to the rotor between the stator and the shaft. The diameter of the traction sheave is smaller than that of the rotor. The structure of the motor allows the use of traction sheaves of different diameters (2*Rv) with rotors of the same diameter. The motor is very flat i.e. its length in the axial direction is small.
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 22, 1994 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 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.