Hinge device for coupling a member rotatably to another
CA 2018916 C · Owner: Nhk Spring Co. Ltd. · Inventors: Hino, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hinge device having a bearing member and a shaft. The bearing member has a sleeve section having a through hole, in which the shaft is inserted. The inner circumferential surface of the sleeve section contact the circumferential surface of the shaft. The sleeve section has slits which extend parallel to the axis of the sleeve section. Ring springs are mounted on the sleeve section. In their freed state, the springs have an inside diameter smaller than the outside diameter of the shaft. The ring springs tighten the sleeve section onto the shaft, thus generating a frictional force between the sleeve section and the shaft.
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 13, 1990 and granted April 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 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.