Lift for large loads
CA 2500616 C · Owner: Rothenbuehler, Reto · Inventors: Rothenbuehler, Reto; Heggli, Mario; Schindler, Kaspar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the case of this lift with a 4:1 cable guidance a drive unit (5) and a first deflecting roller (8) are arranged at a carrier (21) which is supported at one end on a first cage guide rail (15) and a first counterweight guide rail (19) and at the other end on a second counterweight guide rail (20). The guide rails are connected with the shaft wall by means of yokes whereby the vertical rail forces are conducted into the shaft pit. A drive bracket (23) arranged at the carrier (21) carries the drive unit (5) and the drive pulley (3). A roller bracket (24) arranged at the carrier (21) carries the first deflecting roller (8). In addition a first cable fixing point (6) and a second cable fixing …
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 11, 2005 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2025.
- 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.