Lift door drive device
CA 2489497 C · Owner: Bisang, Daniel · Inventors: Luetolf, Juergen; Thielow, Frank; Bisang, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lift door drive device (2) for opening and closing at least one cage door leaf (5) and a corresponding shaft door leaf comprises a coupling mechanism (14) which is mounted at the cage door leaf (5) of a lift cage (1) for transmitting the movement of the cage door leaf (5) to the shaft door leaf with two parallel entraining runners (15) which are mounted on pivotable adjusting elements (17.1 17.2) and are adjustable in their mutual spacing as well as a drive unit (18) which transmits closing and opening movements to the cage door leaf by way of a drive means (9) wherein the drive means (9) leads the entraining runners (15) to a coupling element (18) at the shaft door leaf before the start …
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 December 7, 2004 and granted October 16, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 7, 2024.
- 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.