Compact escalator
CA 2278186 A1 · Owner: Vadas, Peter · Inventors: Vadas, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The compact escalator according to the invention is provided with stair steps on different levels, wherein the height of each step (2) is variable the , steps (2) contain a fixed lower (4) and a vertically movable upper element (3), a lifting device is between the lower (4) and upper element (3) and said lifting device is connected to a control unit provided with at least a direction switch. Said lifting devices are hinged joint type mechanisms (6). Said lifting devices are pulley block type mechanisms. The lifting devices are provided with electric motor (5). The lifting devices are provided with hydraulic or pneumatic cylinders (13). The lifting devices are provided with starter …
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 January 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2020.
- 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.