Rack and pinion lift system
CA 1185716 A · Owner: Linden-Alimak Ab · Inventors: Kohler, Ulf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to rack and pinion lifts which include a lift car, which is driven via toothed wheels by means of en electromotor along a rack carried by a lift mast, said car containing a control and manoeuver unit for theelectric motor with a control and manoeuver button set including floor call buttons, landing based call button units being connected to said control and manoeuver unit via a ground level unit from which also a power cable leads to the lift car. In association with the lift car a sensor device is arranged to indicate passage of teeth of the rack or the toothed wheel and produce corresponding position impulses, which represent the position of the lift car. A micro …
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
- Granted April 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
- 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.