Low noise relay
CA 2432444 C · Owner: Fry, Charles David · Inventors: Herrmann, Henry Otto Jr.; Copper, Charles Dudley; Irlbeck, Robert Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to reduce acoustic noise, an electromagnetic relay (2) includes an insert or bump (20) located between the relay armature (4) and the relay core (8). The insert is flexible and can be mounted on the armature. The insert (20) reduces noise by decelerating the armature (4) at impact with the core (8). The armature (4) can be tilted relative to a surface of the core (8) so that the insert or bump (20) can be positioned away from the primary impact between the core and the armature.
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 16, 2003 and granted August 16, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2025.
- 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.