Regulating device with starting and stopping device for screw-type compressors, and starting and stopping device used hereby
CA 2121763 A1 · Owner: Van Dyck, Christiaan · Inventors: Van Dyck, Christiaan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Regulating device with starting and stopping device for screw-type compressors, and starting and stopping device used hereby. Regulating device with starting and stopping device for screw-type compressors which contain a compressor element (1), an electrical motor (2) to drive this compressor element (1), a minimum pressure valve (4) which is mounted on the outlet (5) of the compressor element (1) and a vessel (6) which is mounted between the compressor element (1) and the minimum pressure valve (4) which, regulating device contains means (9) to control the motor (2), characterized in that the means (9) to control the motor (2) are means to make said motor (2) turn at a frequency-regulated …
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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 April 20, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 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.