Apparatus and method for the reduction of drag
CA 2426219 A1 · Owner: Weir, Frederick C. · Inventors: Weir, Frederick C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an apparatus for reducing drag of an aircraft utilized in combination with an aircraft surface where the local airflow has , an upward momentum due to the free air stream being deflected upward by the aircraft surface. The, apparatus comprises an ancillary airfoil having a cambered top surface a , leading edge and, a trailing edge and a generally concave lower surface; mounting members for mounting, the ancillary airfoil above the aircraft surface in a spaced apart manner and at a positive, angle of attack with respect to the local airflow; and an expansion chamber formed, between the lower surface of the ancillary airfoil and the aircraft surface. 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 April 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2025.
- 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.