Quick-acting valve
CA 2558127 C · Owner: Kammerer, Bernd · Inventors: Adams, Hans; Kammerer, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The switching valve of a quick-operating slider system is an electrically operated, stop valve. In the case of a required rapid shutoff the coil (19) must be , de-energized in a very short period of time in order to allow the switching valve (18) to open. For this purpose, a voltage-dependent resistor (33) is provided between the voltage source (25) and the coil (19) said resistor (33) , having a high resistance below a switching voltage (Us) but a negligibly , small , resistance above the switching voltage. An auxiliary voltage source (35) is connected in parallel to the coil (19) the voltage of said auxiliary voltage source (35) being opposite to that of the voltage source (25). In …
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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 12, 2005 and granted July 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.