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US 9,205,928 B2Granted
Ram air turbine startup
AssigneeRosemount Aerospace Inc.
InventorDavid Everett Russ
Life of this patent
Estimating the term…
Abstract
A ram air turbine (RAT) in which a cam follower is operably coupled to turbine blades such that a cam follower position determines turbine blade pitch.
Claims7
A startup assistance apparatus for a ram air turbine (RAT), the apparatus comprising:
- a shaft having threading over a partial length thereof;
- a nut disposed on the shaft to travel back and forth between a beginning of the partial length, an end of the partial length and a remote position remote from the partial length;
- an elastic element to bias the nut towards the remote position;
- a lever operably coupled to the nut to selectively move the nut from the remote position to the end of the partial length against the elastic element bias;
- and
- a system by which the nut provides the RAT with first direction blade rotation assistance while traveling from the beginning to the end of the partial length and second direction blade rotation of the RAT selectively moves the nut from the end to the beginning of the partial length against the elastic element bias.
3 more elements
A startup assistance apparatus, comprising:
- a shaft;
- a nut disposed on the shaft to travel back and forth between a beginning of a partial length of the shaft, an end of the partial length and a remote position remote from the partial length, the nut being biased toward the remote position and selectively movable from the remote position to the end of the partial length against the bias;
- a system by which the nut provides a ram air turbine (RAT) with first direction blade rotation assistance while traveling from the beginning to the end of the partial length and second direction blade rotation of the RAT selectively moves the nut from the end to the beginning of the partial length against the bias;
- and
- a hand operated lever for selective movement of the nut.
2 more elements
Dependencies are inferred from the claim text.