Wind force responsive umbrella
CA 2060730 A1 · Owner: Liou, Fu-Tien · Inventors: Okuda, Toshio; Liou, Fu-Tien
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Umbrella, Abstract of the Disclosure, An umbrella that closes when the inside surface of the open umbrella's cover is exposed to a gust of wind normally strong enough to invert the umbrella's rib linkage system. Each stretcher rib of the umbrella's rib linkage system is connected to the umbrella's runner when the umbrella is opened during normal use such that each stretcher rib extends beneath a plane that includes the connections of those stretcher ribs to the runner at a downwardly directed acute angle with the umbrella's centerpost. A latch mounted in the centerpost defines a latch edge which does not support the umbrella's runner on the centerpost, and therefor does not hold 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 February 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2014.
- 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.