Curved escalator
CA 1204696 A · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Nakatani, Hiroshi; Yoshikawa, Hiroshi; Tomidokoro, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A curved escalator includes guide tracks for defining a stairway path which includes a constant slope intermediate section, horizontal landing sections and, transient sections smoothly connecting the intermediate section and the landing sections. Each section of differing slope has a differing radius of curvature when viewed in plan which is inversely proportional to the slope angle thereby, eliminating the need for drive chains to change the distance between the step axles. Turn-around mechanisms that are compact and simple in structure are also disclosed.
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 May 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
- 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.