Patent US3303993A successfully refreshed from Google Patents.
US3303993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid-flow machines
Assignee: Dowty Technical Developments Ltd
•
Filing: 1964-11-12
•
Granted: 1967-02-14
•
Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas D H Andrews
- 👤 Spence Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:56
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/04; F02C6/10; F02C6/12; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/32; F02C3/00; F02C3/04; F02C3/045; F02C3/05; F04; F04D; F04D25/00; F04D25/02; F04D25/04; F04D25/045; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A ROTARY FLUID-FLOW MACHINE INCLUDING A TURBINE AND COMPRESSOR, THE ROTORS OF WHICH ARE INTEGRALLY FORMED AS A SINGLE ROTATABLE MEMBER OF WHOLLY CENTRIFUGAL TYYPE HAVING TWO SEPARATE SETS OF FLOW-DEFINING VANES, THE FIRST SET BEING TURBINE VANES AND THE SECOND SET BEING COMPRESSOR VANES, THE CASING OF THE MACHINE IN WHICH THE MEMBER IS ROTATABLE BEING SO SHAPED AS TO PROVIDE AN ENTRY TO THE FIRST SET OF VANES AND ALSO TO PROVIDE A FURTHER ENTRY TO THE SECOND SET OF VANCES, AND THE CASING BEING SHAPED ALSO TO PROVIDE TWO SEPARATE CHANNELS RESPECTIVELY IN REGISTRY WITH THE EXITS OF THE SETS OF VANES, SAID SEPARATE CHANNELS SO OPENING INTO EACH OTHER THAT THE FLUIDS DISCHARGED BY THE COMPRESSOR AND THE TURBINE ARE MIXED TOGETHER DOWNSTREAM OF THE TURBINE VANES BUT BEFORE DISCHARGE FROM THE MACHINE THROUGH A MIXED FLUID OUTLET, THE SAID CASING HAVING AN INNER PORTION THROUGH THE INTERIOR OF WHICH THE EXHAUST GASES LEAVING THE TURBINE PASS, AND AROUND THE OUTSIDE OF WHICH THE FLUID DELIVERED BY THE COMPRESSOR PASSES, SO THAT AN INSULATING AIR ENVELOPE IS PROVIDED AROUND THAT PORTION OF THE CASING.
Claim 2
Dependent Claim
188 words
A ROTARY FLUID-FLOW MACHINE INCLUDING A TURBINE AND COMPRESSOR, THE ROTORS OF WHICH ARE INTEGRALLY FORMED AS A SINGLE ROTATABLE MEMBER OF WHOLLY CENTRIFUGAL TYYPE HAVING TWO SEPARATE SETS OF FLOW-DEFINING VANES, THE FIRST SET BEING TURBINE VANES AND THE SECOND SET BEING COMPRESSOR VANES, THE CASING OF THE MACHINE IN WHICH THE MEMBER IS ROTATABLE BEING SO SHAPED AS TO PROVIDE AN ENTRY TO THE FIRST SET OF VANES AND ALSO TO PROVIDE A FURTHER ENTRY TO THE SECOND SET OF VANCES, AND THE CASING BEING SHAPED ALSO TO PROVIDE TWO SEPARATE CHANNELS RESPECTIVELY IN REGISTRY WITH THE EXITS OF THE SETS OF VANES, SAID SEPARATE CHANNELS SO OPENING INTO EACH OTHER THAT THE FLUIDS DISCHARGED BY THE COMPRESSOR AND THE TURBINE ARE MIXED TOGETHER DOWNSTREAM OF THE TURBINE VANES BUT BEFORE DISCHARGE FROM THE MACHINE THROUGH A MIXED FLUID OUTLET, THE SAID CASING HAVING AN INNER PORTION THROUGH THE INTERIOR OF WHICH THE EXHAUST GASES LEAVING THE TURBINE PASS, AND AROUND THE OUTSIDE OF WHICH THE FLUID DELIVERED BY THE COMPRESSOR PASSES, SO THAT AN INSULATING AIR ENVELOPE IS PROVIDED AROUND THAT PORTION OF THE CASING.
References Cited (Backward Citations)
GB148822A
Cited
US1181780A
Cited
US1368751A
Cited
US2238502A
Cited
US2516822A
Cited
US2611241A
Cited
US2873945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |