Rotor for rotary wing aircraft
CA 2277870 A1 · Owner: Carter, Jay W. Jr. · Inventors: Carter, Jay W. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotor (1) for rotary wing aircraft has a tip to tip flexbeam spar (4) and torsionally stiff hollow blades (2) bonded to the spar throughout the tip-most portion of the blades. The spar has spaced-apart spar caps (9 10) which have , a dual beam cross section in the region not bonded to the blades so that the spar is twistable for pitch control. A collective control for pitch change employs a coil spring (30) mounted between a pitch horn (36) and a hub (27).
Read the whole patent
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 January 9, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 9, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 2020.
- 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.