Automated branch flow calibration in a hvac distribution system
CA 2198053 C · Owner: Landis & Staefa, Inc. · Inventors: Ahmed, Osman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A HVAC system automates the process of calibrating the individual branch flows of the system. For each branch of the system a damper is closed and flow values at the output of the prime mover and at the input of the damper are measured. The damper is then opened 50% and again flow values at the output of the prime mover and at the input of the damper are measured. A flow coefficient which correlates the flow difference measured at the output of the prime mover with the flow difference measured at the input of the damper is then determined. The flow through each damper of each branch is calibrated in this manner resulting in an overallbalancing of the HVAC system. The automated process of …
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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 February 20, 1997 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2019.
- 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.