US4995786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual variable camber compressor stator vane
Assignee: RTX Corp
•
Filing: 1989-09-28
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Granted: 1991-02-26
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Expires: 2009-09-28
Abstract
Abstract A compressor stator vane for a gas turbine engine comprised of a leading edge section and a trailing edge section and constructed so that either or both sections may be rotated about a common axis of rotation to vary vane camber with torque for rotating the sections being applied around the engine perimeter.
Inventors
- 👤 Jerry W. Wheeler
- 👤 Walter H. Wiley, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/162; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D5/148; F01D7/00; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/56; F04D29/563; F05; F05D; F05D2260/00; F05D2260/70; F05D2260/74; F05D2260/76; F05D2260/79
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A compressor stator vane for a gas turbine engine, said vane having a leading edge section and a trailing edge section, each section having a shaftlike portion extending through the outer casing of said engine, a shaftlike projection supporting an inner shroud of said engine, and an airfoil portion between said shaftlike portion and said shaftlike projection, means connected to the shaftlike portion of each edge section for adjusting the position of each edge section, and control means connected to said section adjusting means to actuate said section adjusting means and vary the camber of said vane.
Claim 2
Dependent Claim
97 words
A compressor stator vane for a gas turbine engine, said vane having a leading edge section and a trailing edge section, each section having a shaftlike portion extending through the outer casing of said engine, a shaftlike projection supporting an inner shroud of said engine, and an airfoil portion between said shaftlike portion and said shaftlike projection, means connected to the shaftlike portion of each edge section for adjusting the position of each edge section, and control means connected to said section adjusting means to actuate said section adjusting means and vary the camber of said vane.
Claim 3
Dependent Claim
29 words
A stator vane in accordance with claim 1 in which the shaftlike portion of the trailing edge section is fitted within the shaftlike portion of the leading edge section.
Claim 4
Dependent Claim
53 words
A stator vane in accordance with claim 1 in which the engine includes at least one stage of vanes and the control means include first synchronizing means connected to each adjusting means for the vane leading edge sections and second synchronizing means connected to each adjusting means for the vane trailing edge sections.
Claim 5
Dependent Claim
29 words
A compressor vane in accordance with claim 1 in which the leading edge section and the trailing edge section have a common axis of rotation for varying vane camber.
Claim 6
Dependent Claim
48 words
A compressor vane in accordance with claim 1 in which the shaftlike portion of the leading edge section is annular in form and the shaftlike portion of the trailing edge section is essentially circular in form and adapted to fit within the leading edge section annular shaft portion.
Claim 7
Dependent Claim
36 words
A compressor vane in accordance with claim 1 in which the shaftlike projection of the leading edge section has essentially a semi-circular shape and the shaftlike projection of the trailing edge section has a sector shape.
References Cited (Backward Citations)
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US2914241A
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US3442493A
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US4634340A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |