Stairlift
CA 2490362 A1 · Owner: Rickaby, John Peter · Inventors: Rickaby, John Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stair lift comprises a lift assembly arranged to be driven along a rail. The lift assembly comprises a chassis (10) supporting a load bearing member such as a seat (1) and the chassis is formed by a main member on which are mounted a drive assembly (11) and a levelling assembly (12) for maintaining the seat horizontal by altering the orientation of the chassis with respect to the rail so as to maintain horizontal the load bearing member as the lift assembly moves along the rail. One or both of the drive and levelling assemblies may be pivotally mounted on the chassis to permit rotation about a vertical axis so as to accommodate bends in the rail.
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 June 20, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 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.