Stair lift system
CA 2497957 A1 · Owner: Sircovich, Oscar · Inventors: Sircovich, Oscar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stairs lift system capable of converting stairs climbing operation into a walking movement along a horizontal plane. The system comprises an existing substrate flight of stairs (10) and a second overlaying layer of stairs (16); , each overlaying stair comprising a lifting element (16a). Mechanical electronic or hydraulic means (134; 234; 334) are provided for lifting the top panel (16a) up to the height of the next-in-line overlaying stair. The lifting means are activated when sensing the presence of a subject having stepped on the first-in-line lifting element top panel (16a). The first-in-line lifting element returns to the initial position once the subject has stepped over to …
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 August 31, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 2025.
- 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.