Arresting/release device for a swing catch of a working current door opener
CA 2229668 C · Owner: Toma, Augustin · Inventors: Toma, Augustin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arresting/release device for a swing catch of a working-current door opener has a catch lever which arrests or releases the swing catch a first safety, lever which maintains the catch lever in the arrested position and is pivotable with the aid of an electromagnet into a position releasing the catch lever and a second, safety lever which acts on the first safety lever for impact protection of the catch lever. In order to achieve an impact protection advantageous from the, manufacturing and installation standpoint the second safety lever is constituted by a mechanically-decoupled lever of low mass mounted at its centre of gravity. This symmetrically-constructed, vibration-proof second …
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 16, 1998 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2020.
- 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.