Hinge having an automatic recovery mechanism
CA 2103776 A1 · Owner: Lin, Chi-Chung · Inventors: Lin, Chi-Chung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hinge includes a housing a barrel rotatably, engaged in the housing a shaft extended in the housing, and the barrel two rings engaged on the shaft and, movable along the shaft springs engaged on the shaft, for biasing the rings toward each other one of the, rings has a pair of helical surfaces and the other, ring has two projections for slidably engaging with the helical surfaces. The rings are separated from each other to compress the springs when the door is opened and the rings are forced toward each other by the springs.
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 August 10, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2015.
- 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.