Propeller pitch and engine load control apparatus
CA 1089331 A · Owner: Bjorknas, John I. · Inventors: Bjorknas, John I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Apparatus including series-connected pitch inching pilot valve, load control pilot valve, pressure feedback valve assembly, pitch direction selector valve and servo power, cylinder assembly. A load control bypass valve is connected in parallel with the pressure feedback valve assembly and a pitch reduction damping check valve is connected in parallel with the load control pilot valve. Counterbalancing pilot signals in the pitch inching pilot valve are received from a pressure varying manual control valve and a pitch feedback transmitter; in the load control pilot valve either from a manual load control valve and a governor load feedback valve or from each side 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
- Granted November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 1997.
- 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.