Fluid reaction surfaces (i.e. – impellers) – With control means responsive to non-cyclic condition... – Responsive to condition of torque or thrust of device or...
Patent
1979-02-12
1981-04-07
Jillions, John M.
Fluid reaction surfaces (i.e., impellers)
With control means responsive to non-cyclic condition...
Responsive to condition of torque or thrust of device or...
416 49, B63H 308
Patent
active
042603293
ABSTRACT:
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 the pressure feedback valve assembly; in the load control bypass valve from the outlets of the inching pilot valve and the load control pilot valve. A mechanical load control override mechanism automatically places the load control pilot valve in the open to fluid pressure source position when the servo power cylinder assembly is set in the neutral propeller pitch mode by the pitch direction selector valve.
REFERENCES:
patent: 2878880 (1959-03-01), Gillespie
patent: 3826590 (1974-07-01), Kobelt
patent: 3915590 (1975-10-01), Bjorknas
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