Overload protection device for a propeller drive engine

Details Overload protection device for a propeller drive engine Overload protection device for a propeller drive engine

1978-12-29

1981-09-01

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Responsive to condition of torque or thrust of device or...

416108, 416111, B63H 110

Patent

active

042869234

ABSTRACT:
An overload protection device for the drive engine of a propeller, wherein the pitch of the propeller blades may be adjusted: A servomotor with a piston therein and the servomotor being controlled by a control valve which is adjustable by an adjustment lever. The piston of the servomotor is connected via a push rod to the control station of the propeller. An adjustment device is associated with the control valve for adjusting the control valve in a direction to reduce the pitch thereof when drive engine overload occurs. A signal from the drive engine passes through a converter which magnifies it. The magnitude of the signal, as converted, is proportional to the loading of the drive engine. A reversing valve, controlled by the position of the control piston of the servomotor, operates a double acting piston connected with the operating rod of the control valve. Depending upon the shifting of the operating piston of the control valve, the servomotor is operated to adjust the pitch of the propeller blades.

REFERENCES:
patent: 2432320 (1947-12-01), Lilley
patent: 2664959 (1954-01-01), Stuart
patent: 2971583 (1961-02-01), Hansen et al.
patent: 3241618 (1966-03-01), Baer
patent: 3603697 (1971-09-01), Lane
patent: 3915590 (1975-10-01), Bjorknas
patent: 4084537 (1978-04-01), Eichler

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