Device for adjustable pre-loading of elastic means associated with a take-up roller
CA 2016476 C · Owner: Sunproject S.R.L. · Inventors: Tedeschi, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plate for closing one end of a box for housing a window shade roller, includes a cylindrical recess made in the plate coaxially to a through hole and into which a bushing is placed. The bushing is provided with an axial hole having a polygonal cross section and two strikers suited to fit into corresponding notches in the recess. A spring placed inside the recess on a collar integral with the bushing, locks the strikers and notches and prevents axial rotation of the bushing. A washer fastened to the plate closes the recess. A non-round tang extending from one end of a roller can engage the hole in the bushing. Axially pushing on the bushing while rotating the bushing achieves the release …
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 May 10, 1990 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 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.