Method and apparatus for controlling liquid level in a knot drainer
CA 2121807 A1 · Owner: Beloit Technologies, Inc. · Inventors: Young, Douglas L. G.; Clarke-Pounder, Ian J. H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screen aperture blinding prevention and liquid overflow prevention and level control apparatus for a knot drainer (100) senses liquid level (77) within the knot drainer (100) and compares the sensed level to a setpoint level. Differences in the two levels generate control signals of appropriate magnitude and direction and those control signals are transmitted to a valve (140) whose degree of responsiveness and openness is adjusted to change the outflow rate of accepts liquor from the accepts chamber (80) of the rejects separator. In addition, passive level control is provided in the discharge line for establishing accept flooded screen apertures (61) regardless of variations of inflow …
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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 October 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2014.
- 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
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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.