Operating device for a venetian blind to control raising and lowering of the slats and to adjust tilting angle of the slats
CA 2209451 C · Owner: Huang, Tai-Long · Inventors: Huang, Tai-Long
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An operating device for a Venetian blind includes a rotary tilt control unit which is adapted to be coupled to a shaft of the Venetian blind so as adjust tilting angles of slats. A positioning tube is connected to the tilt control unit and has a top opening and an axially extending slot. A retaining member is axially movable in the positioning tube, and has a tapered upper end portion extendible through the top opening and a radial pin hole aligned with the slot. A biasing spring biases the retaining member upwardly so that pull ropes which extend through the positioning tube can be clamped between the tapered upper end portion and the positioning tube. An elongated sleeve disposed around …
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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 July 2, 1997 and granted March 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2019.
- 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.