Turn coordination inhibit for rotary wing aircraft control system
CA 2189455 C · Owner: Boeing Company (The) · Inventors: Gold, Phillip J.; Skonieczny, Joseph; Keller, James F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A turn coordination inhibit system (150) inhibits a rotary winged aircraft control system from operating in an automatic turn coordination mode when a pilot desired to perform a sideslip maneuver e.g. a flat turn. When automatic turn coordination is not engaged (132, 212, 215), e.g. the aircraft is not in a coordinated turn and either aircraft bank angle (119) exceeds an inhibit threshold magnitude (210) or a pilot yaw command provided by a pilot sidearm controller (155) exceeds a minimum threshold value (243) e.g. the sidearm, controller is out of detent in the yaw axis automatic turn coordination is inhibited (152). Automatic turn coordination remains inhibited until both aircraft bank …
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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 11, 1995 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2017.
- 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.