US 6,077,040 A · Control system for blades for a variable pitch propeller

Abstract

A system for controlling propeller blade pitch is disclosed. The system comprises a transfer tube, wherein the transfer tube defines an element of the rotatable portion and wherein the transfer tube is non-translating relative the rotatable and non-rotatable portions. A transfer bearing for providing hydraulic fluid to and interfacing with the transfer tube is also used, wherein the transfer bearing is located on the non-rotatable portion. The system further includes a pitch change actuator and a mechanism form for actuating the pitch change actuator, wherein the mechanism is fluidically connected to and translatable relative to the transfer tube. A device for measuring blade angle of the propeller blade is also provided, wherein the device is separate and distinct from the transfer tube.

Claims29

Dependent claims

A propeller blade pitch control system for a propeller having a non-rotatable portion and a rotatable portion while in operation, comprising:

a transfer tube, wherein said transfer tube defines an element of said rotatable portion and wherein said transfer tube is axially non-translating relative said rotatable and non-rotatable portions;
means for providing hydraulic fluid to and interfacing with said transfer tube, wherein said means for providing is located on said non-rotatable portion;
means for changing the pitch of said propeller blade;
means for actuating said means for changing, wherein said means for actuating is fluidically connected to and axially translatable relative to said transfer tube;
and
means for measuring blade angle of said propeller blade, wherein said means for measuring is separate and distinct from said transfer tube.

3 more elements

Dependencies are inferred from the claim text.

Control system for blades for a variable pitch propeller

Life of this patent

Control system for blades for a variable pitch propeller

Life of this patent

Abstract

Claims29