Variable Vane and Lever Arm
AssigneeRtx Corporation
InventorsSamuel B. Hoyt, Fadi Samir Maalouf
Life of this patent
Estimating the term…
Abstract
A vane has: an airfoil having a first end and a second end; and a first shaft protruding from the first end of the airfoil. The first shaft has: a threaded distal portion; and proximally of the threaded distal portion, a first lateral facet and a second lateral facet opposite the first lateral facet. An upper end of the first facet is axially recessed relative to an upper end of the second facet.
Claims20
A vane comprising:
- an airfoil having a first end and a second end;
- and
- a first shaft protruding from the first end of the airfoil and having:
- a threaded distal portion;
- and
- proximally of the threaded distal portion, a first lateral facet and a second lateral facet opposite the first lateral facet,
- wherein:
- an upper end of the first facet is axially recessed relative to an upper end of the second facet.
A vane assembly comprising a vane having an airfoil and a shaft protruding from an end of the airfoil and a vane arm, the vane arm comprising:
- a first end and a second end;
- a shank extending between the first end and the second end and having a first face and a second face;
- a first hole in the shank proximate the first end;
- a second hole in the shank proximate the second end;
- a first tab projecting laterally from the shank proximate the second end and having:
- a bend;
- and
- a distal portion distally of the bend;
- and
- a second tab projecting laterally from the shank proximate the second end laterally opposite the first tab and having:
- a bend;
- a distal portion distally of the bend and partially overlapping the first tab distal portion;
- and
- a third hole in the second tab distal portion and having a proximal edge and a distal edge,
- wherein:
- the shaft has a first facet abutting the proximal edge of the third hole and a second facet abutting the first tab, an upper end of the first facet axially recessed relative to an upper end of the second facet.
A vane assembly comprising a vane having an airfoil and a shaft protruding from an end of the airfoil and a vane arm, the vane arm comprising:
- a first end and a second end;
- a shank extending between the first end and the second end and having a first face and a second face;
- a first hole in the shank proximate the first end;
- a second hole in the shank proximate the second end;
- a first tab projecting laterally from the shank proximate the second end and having:
- a bend;
- and
- a distal portion distally of the bend;
- and
- a second tab projecting laterally from the shank proximate the second end laterally opposite the first tab and having:
- a bend;
- a distal portion distally of the bend and partially overlapping the first tab distal portion;
- and
- a third hole in the second tab distal portion and having a proximal edge and a distal edge,
- wherein:
- the shaft has a first facet abutting the proximal edge of the third hole and a second facet abutting the first tab, an asymmetry between the first facet and the second facet providing means for preventing an installation of the vane arm to the shaft in a 180° rotation about an axis of a threaded portion of the shaft.
Dependencies are inferred from the claim text.