Patent US4195964A successfully refreshed from Google Patents.
US4195964A
Expired / Lapsed
US
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Arrangement for reducing gap losses in the adjustable guide vanes of fluid flow machines, particularly gas turbine engines
Assignee: MTU Aero Engines AG
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Filing: 1978-08-14
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Granted: 1980-04-01
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Expires: 1998-08-14
Abstract
Abstract An arrangement for reducing the gap formed by the adjustable axial-flow guide vanes of fluid flow engines, such as gas turbine engines, between the root-sided lower edges of the vane airfoil and the thereto contiguous outer wall of an annular flow passageway. Grooves are formed in the outer wall of the flow passageway above a leading and/or trailing lower edge of the vane airfoil; a soft vane base-covering coating filling said grooves; and recesses formed in the coating-filled grooves slightly above the pivot plane of the respective lower vane edges.
Inventors
- 👤 Eckhard Kraft
- 👤 Volker Lunneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/162; F04D29/08; F04D29/083; F04D29/52; F04D29/54; F04D29/56; F04D29/563; F01D11/00; F01D11/08; F01D11/12; F01D11/122; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49321
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
In an arrangement for reducing the gap formed by the adjustable axial-flow guide vanes of fluid flow engines, such as gas turbine engines, between the rootsided lower edges of the vane airfoil and the thereto contiguous outer wall of an annular flow passageway; the improvement comprising grooves formed in the outer wall of said flow passageway above a leading and/or trailing lower edge of the vane airfoil; a soft vane base-covering coating filling said grooves; and recesses being formed in said coating-filled grooves slightly above the pivot plane of the respective lower vane edges.
Claim 2
Dependent Claim
94 words
In an arrangement for reducing the gap formed by the adjustable axial-flow guide vanes of fluid flow engines, such as gas turbine engines, between the rootsided lower edges of the vane airfoil and the thereto contiguous outer wall of an annular flow passageway; the improvement comprising grooves formed in the outer wall of said flow passageway above a leading and/or trailing lower edge of the vane airfoil; a soft vane base-covering coating filling said grooves; and recesses being formed in said coating-filled grooves slightly above the pivot plane of the respective lower vane edges.
Claim 3
Dependent Claim
14 words
Arrangement as claimed in claim 1, said recesses being formed by a vane-simulating tool.
Claim 4
Dependent Claim
29 words
Arrangement as claimed in claim 1, said coating in said grooves at least partially encompassing a generally plate-shaped section of the vane neck portion of said adjustable guide vanes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |