Patent US5636968A successfully refreshed from Google Patents.
US5636968A
Expired / Lapsed
US
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Device for assembling a circular stage of pivoting vanes
Assignee: Safran Aircraft Engines SAS
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Filing: 1995-07-27
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Granted: 1997-06-10
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Expires: 2015-07-27
Abstract
Abstract A device for assembling a circular stage of pivoting vanes and composed of a ring for retaining bushes in which the pivots of the vanes rotate. The ring is composed of sectors extending between the pivots and connected together by a circular rail. A further ring separate from the rail or integrated with the latter is engaged in throats of the pivots so as to retain them against an axial movement.
Inventors
- 👤 Jacques R. Audet
- 👤 Jean-Louis Charbonnel
- 👤 Gerard G. Miraucourt
- 👤 Jean-Claude Prato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:27
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/56; F04D29/563; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/162; F05; F05D; F05D2250/00; F05D2250/10; F05D2250/14; F05D2250/141
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A device for assembling a circular stage of vanes that rotates about pivots, the device comprising: a set of sectors, the sectors being joined in a ring configuration and comprising recesses housing bushes for rotatably supporting the pivots; and an annular rail for retaining the sectors together in the ring configuration; wherein the pivots comprise circular grooves and the device further comprises an annular structure provided with apertures, portions of the annular structure adjacent to the apertures being engaged in the grooves.
Claim 2
Independent Claim
82 words
A device for assembling a circular stage of vanes that rotates about pivots, the device comprising: a set of sectors, the sectors being joined in a ring configuration and comprising recesses housing bushes for rotatably supporting the pivots; and an annular rail for retaining the sectors together in the ring configuration; wherein the pivots comprise circular grooves and the device further comprises an annular structure provided with apertures, portions of the annular structure adjacent to the apertures being engaged in the grooves.
Claim 3
Dependent Claim
42 words
A device for assembling a circular stage of pivoting vanes according to claim 1, wherein the annular rail has a hollow cross-section and includes a bottom portion covering the pivots, the annular structure being disposed between the bottom portion and the sectors.
Claim 4
Dependent Claim
29 words
A device for assembling a circular stage of pivoting vanes according to claim 2, wherein the bottom portion bears a layer of abradable material belonging to a sealing device.
Claim 5
Dependent Claim
23 words
A device for assembling a circular stage of pivoting vanes according to claim 2, wherein the annular structure is integrated with the rail.
Claim 6
Dependent Claim
62 words
A device for assembling a circular stage of pivoting vanes according to claim 4, wherein the annular structure has a cross-section comprising two angles, the angles each being composed of a first wing rising from the bottom and a second wing, the first wings being mutually parallel and the second wings being co-cylindrical and directed towards each other from the first wings.
Claim 7
Dependent Claim
26 words
A device for assembling a circular stage of pivoting vanes according to claim 1, wherein the annular structure is a continuous ring separate from the rail.
Claim 8
Dependent Claim
54 words
A device for assembling a circular stage of pivoting vanes according to claim 6, wherein the apertures are composed of two adjacent portions, the first of said portions being wider than a diameter of the pivots and the second of said portions being narrower than the diameter of the pivots, except at the grooves.
Claim 9
Dependent Claim
28 words
A device for assembling a circular stage of pivoting vanes according to claim 6, wherein the apertures are slits opening onto one of the sides of the ring.
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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) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |