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US 12,000,360 B2Granted
Axial expandable exhaust duct
AssigneeRtx Corporation
InventorsLawrence A. Binek, Jesse R. Boyer
Life of this patent
Estimating the term…
Abstract
An exhaust duct for an engine includes an outer exhaust duct and a nested exhaust duct capable of having at least two configurations. The nested exhaust duct is circumferentially surrounded by the outer exhaust duct for a first length of the nested exhaust duct in a first configuration. The nested exhaust duct is circumferentially surrounded by the outer exhaust duct for a second length of the nested exhaust duct in a second configuration, which is less than the first length.
Claims14
A manufacturing method, comprising:
- forming an outer exhaust duct;
- forming an inner exhaust duct within the outer exhaust duct;
- moving the inner exhaust duct axially along a centerline within the outer exhaust duct from a first position to a second position to provide an engine exhaust;
- wherein, at the first position, the inner exhaust duct is circumferentially surrounded by the outer exhaust duct and the inner exhaust duct is axially overlapped by the outer exhaust duct by a first length;
- and
- wherein, at the second position, the inner exhaust duct is circumferentially surrounded by the outer exhaust duct and the inner exhaust duct is axially overlapped by the outer exhaust duct by a second length that is less than the first length:
- and
- rotating the inner exhaust duct about the centerline relative to the outer exhaust duct to lock the inner exhaust duct at the second position.
5 more elements
A manufacturing method, comprising:
- forming an outer exhaust duct;
- forming an inner exhaust duct within the outer exhaust duct;
- and
- moving the inner exhaust duct axially along a centerline within the outer exhaust duct from a first position to a second position to provide an engine exhaust;
- wherein, at the first position, the inner exhaust duct is circumferentially surrounded by the outer exhaust duct and the inner exhaust duct is axially overlapped by the outer exhaust duct by a first length;
- wherein, at the second position, the inner exhaust duct is circumferentially surrounded by the outer exhaust duct and the inner exhaust duct is axially overlapped by the outer exhaust duct by a second length that is less than the first length;
- wherein the outer exhaust duct is formed with a key on an interior side of the outer exhaust duct, the inner exhaust duct is formed with a keyway on an exterior side of the inner exhaust duct, the key is mated with the keyway at the second position, and wherein the key is away from the keyway at the first position.
4 more elements
A manufacturing method, comprising:
- forming an outer exhaust duct;
- forming an inner exhaust duct within the outer exhaust duct;
- providing a spring between the outer exhaust duct and the inner exhaust duct;
- and
- moving the inner exhaust duct axially along a centerline within the outer exhaust duct from a first position to a second position to provide an engine exhaust;
- wherein, at the first position, the inner exhaust duct is circumferentially surrounded by the outer exhaust duct and the inner exhaust duct is axially overlapped by the outer exhaust duct by a first length;
- and
- wherein, at the second position, the inner exhaust duct is circumferentially surrounded by the outer exhaust duct and the inner exhaust duct is axially overlapped by the outer exhaust duct by a second length that is less than the first length;
- and
- compressing the spring as the inner exhaust duct is moved within the outer exhaust duct from the first position to the second position.
7 more elements
Dependencies are inferred from the claim text.