Lifting mechanism
CA 2018995 A1 · Owner: Steadman, William D. · Inventors: Steadman, William D.; Steadman, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lifting mechanism for use in lowering or raising a user, such as on entering or leaving a bath or other confined space, comprises at least one support member turnable about an axis, a flexible web associated with the support member and having a further support member by which the web may be suspended in an open loop spanning the bath or other space, and means for extending or retracting the web by the action of the said one support member whereby to enlarge or reduce the loop motor drive, means: for actuating the said one support member whereby to cause it to turn in one direction or the other about the said axis, and means sensitive to the tension in the web and operative to disable the …
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 14, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2012.
- 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.