Load based control system for active leakage control in an air preheater
CA 2403963 A1 · Owner: Marshall, Alan G. · Inventors: Marshall, Alan G.; Rausa, Robert J.; Finnemore, Harlan E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary air preheater (10) has a rotor (14) at least one seal disposed , proximate to the rotor a drive (62) for reciprocally driving a portion of the seal (60) between a first position adjacent the rotor (14) and a second position spaced from the first position and a control system (80) for , activating the drive (62). A logic (94) provides a first activation signal to the drive (62) when the sensed boiler load rises above a first stored boiler load and a second activation signal to the drive when the sensed boiler load falls below a first stored boiler load. The first activation signal activates the drive (62) to drive the portion of the seal (60) to the first position and the …
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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 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2023.
- 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.