US3813185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support structure for rotor blades of turbo-machines
Assignee: Safran Aircraft Engines SAS
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Filing: 1972-06-28
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Granted: 1974-05-28
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Expires: 1992-06-28
Abstract
Abstract A support structure for rotor blades of a turbo-machine comprises a substantially cylindrical or conical hollow drum of fibrous material and a plurality of blade-carrier bars of metal attached side by side on the outer surface of the blades.
Inventors
- 👤 M Bauger
- 👤 J Olivier
- 👤 Croix A La
- 👤 L Bauger
- 👤 J Bouiller
- 👤 M Gobin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:23
CPC Classifications
F; F01; F01D; F01D21/00; F01D21/04; F01D21/045; F01D5/00; F01D5/02; F01D5/06; F01D5/30; F01D5/3007; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A support structure for turbo-machine rotor blades comprising, in comBination, a hollow drum of fibrous material, a plurality of blade-carrier bars of metal arranged side by side on the external surface of said drum of fibrous material and extending each in the axial direction thereof, and at least one ring of fibrous material circumferentially arranged in hoop fashion around said metal bars to retain said bars on said drum.
Claim 2
Dependent Claim
69 words
A support structure for turbo-machine rotor blades comprising, in comBination, a hollow drum of fibrous material, a plurality of blade-carrier bars of metal arranged side by side on the external surface of said drum of fibrous material and extending each in the axial direction thereof, and at least one ring of fibrous material circumferentially arranged in hoop fashion around said metal bars to retain said bars on said drum.
Claim 3
Dependent Claim
64 words
A structure according to claim 1 in which said metal bar, in longitudinal cross-section, exhibits a crenellated configuration comprising at least one projection alternating with at least one radially outwardly opening depression extending in the circumferential direction, the corresponding depressions formed in said successive bars being disposed in circumferential registering relation to constitute at least one annular groove used to receive one such ring.
Claim 4
Dependent Claim
54 words
A structure according to claim 2 in which each metal bar is formed, on its external face, with at least one axially profiled groove shallower than said depression and constituting, in at least one of the projections of said crenellated configuration, a location designed to receive a blade root profiled in a corresponding manner.
Claim 5
Dependent Claim
51 words
A structure according to claim 3 in which the radial thickness of said ring of fibrous material, measured from the bottom of said depression, is at most equal to the radial height of the contiguous projection, measured between the base of said projection and the bottom of the groove formed therein.
Claim 6
Dependent Claim
122 words
A structure according to claim 4 in which the length of a projection, measured in a direction parallel with the drum axis, is greater than that of the blade root fitted in the groove formed in said projection; and in which said structure further comprises a plurality of spacers each with a root having a profile identical with said blade roots, said spacer root presenting two axially spaced end portions which respectively penetrate into the grooves in two successive projections in one and the same bar and abut against the roots of the blades respectively fitted in said grooves, in such a fashion that said spacer, in the region of said ring of fibrous material, straddles the depression defined between said projections.
Claim 7
Dependent Claim
34 words
A structure according to claim 5 in which said spacers, on their radially outer face carry labyrinth partitions designed to cooperate, in sealing relationship, with a structure fixed to the stator of the turbo-machine.
Claim 8
Dependent Claim
17 words
A structure according to claim 2 in which said projections of the metal bars are partially recessed.
Claim 9
Dependent Claim
19 words
A structure according to claim 1 in which said metal bars are glued to said drum of fibrous material.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |