Instrument switch having integrated overcurrent protection
CA 2119211 C · Owner: Schmidt, Wolfgang · Inventors: Krasser, Fritz; Schmidt, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrical instrument switch includes a rocker switch for manual on-and-off switching and that is seated in an insulation housing. Depending on the pivot position the, rocker switch moves, with a working end that dips into the housing interior, a contact bridge between the closed position of its contact and the closed position of its contact. The contact bridge is electrically connected in series with a contact spring that can be triggered thermally and hence acts as an overcurrent protection. The contact spring can move between its contact position and its open position. The contact spring is mechanically prestressed in the direction of its open position. When overcurrent occurs, it is …
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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 March 16, 1994 and granted August 19, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2016.
- 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.