US3379366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contra-rotating compressors
Assignee: Safran Aircraft Engines SAS
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Filing: 1966-11-16
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Granted: 1968-04-23
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Garnier Michel Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:40
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F04D27/0215; F04D19/00; F04D19/02; F04D19/024; F04D27/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A CONTRA-ROTATING COMPRESSOR COMPRISING TWO ROTORS EACH WITH A SET OF BLADES, THE SET OF BLADES OF ONE ROTOR BEING ATTACHED TO THE INNER SURFACE OF A ROTATABLE DRUM, MEANS TO CAUSE THE TWO SETS OF BLADES TO REVOLVE IN OPPOSITE DIRECTIONS, A FIXED OUTER CASING ENCLOSING THE ROTATABLE DRUM, SAID DRUM INCLUDING PORTS FORMED IN THE SURFACE THEREOF IN A RADIAL PLANE CONTAINING AT LEAST ONE COMPRESSOR STAGE, SAID CASING HAVING AN APERTURE, THE PORTS BEING RADIALLY ALIGNED WITH THE APERTURE IN THE CASING, MEANS FOR CONNECTING THE APERTURE TO THE SURROUNDING ATMOSPHERE, AND SEALING MEANS BETWEEN THE ROTATABLE DRUM AND THE FIXED CASING ON EACH AXIAL SIDE OF THE APERTURE.
Claim 2
Dependent Claim
112 words
A CONTRA-ROTATING COMPRESSOR COMPRISING TWO ROTORS EACH WITH A SET OF BLADES, THE SET OF BLADES OF ONE ROTOR BEING ATTACHED TO THE INNER SURFACE OF A ROTATABLE DRUM, MEANS TO CAUSE THE TWO SETS OF BLADES TO REVOLVE IN OPPOSITE DIRECTIONS, A FIXED OUTER CASING ENCLOSING THE ROTATABLE DRUM, SAID DRUM INCLUDING PORTS FORMED IN THE SURFACE THEREOF IN A RADIAL PLANE CONTAINING AT LEAST ONE COMPRESSOR STAGE, SAID CASING HAVING AN APERTURE, THE PORTS BEING RADIALLY ALIGNED WITH THE APERTURE IN THE CASING, MEANS FOR CONNECTING THE APERTURE TO THE SURROUNDING ATMOSPHERE, AND SEALING MEANS BETWEEN THE ROTATABLE DRUM AND THE FIXED CASING ON EACH AXIAL SIDE OF THE APERTURE.
References Cited (Backward Citations)
GB268903A
Cited
US2451944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |