US3384345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial turbine shroud construction
Assignee: Pratt and Whitney Canada Corp
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Filing: 1966-08-15
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Granted: 1968-05-21
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Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Neath Norman
- 👤 Newland Allan Burrell
- 👤 Strelshik Arthur David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:58
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/24; F01D25/26; F01D9/00; F01D9/02; F01D9/04; F01D9/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A CENTRIPETAL TURBINE HAVING: STATIONARY FRAMEWORK A ROTOR, A ROTOR BASE, A SHROUD INCLUDING A SECTION SPACED FROM THE ROTOR SO AS TO COVER AT LEAST THE PORTION OF SAID BASE EXTERIOR TO THE HUB, AND SUPPORT MEANS MOUNTING SAID SECTION TO SAID FRAMEWORK, THE IMPROVEMENT WHEREIN SAID SHROUD SECTION COMPRISES A PLURALITY OF SEPARATE CONCENTRIC ANNULAR COMPONENTS ARRANGED IN MUTUAL ABUTMENT TO PRESENT A SUBSTANTIALLY CONTINUOUS SURFACE ON THE SIDE ADJACENT SAID ROTOR, SAID COMPONENTS HAVING DIVIDING EDGE AREAS WHICH OVERLAP IN RADIAL AND AXIAL DIRECTIONS SO THAT WHEN INNER AND OUTER RIMS OF SAID SECTION ARE UNDER AXIAL TENSION, THE COMPONENTS ARE SUBSTANTIALLY RIGIDLY INTERLOCKED AND SEALED AGAINST ESCAPE THEREBETWEEN THE HIGH PRESSURE GAS FROM THE ROTOR SIDE, SAID SUPPORT MEANS BEING ARRANGED TO MAINTAIN SUCH AXIAL TENSION.
Claim 2
Dependent Claim
131 words
IN A CENTRIPETAL TURBINE HAVING: STATIONARY FRAMEWORK A ROTOR, A ROTOR BASE, A SHROUD INCLUDING A SECTION SPACED FROM THE ROTOR SO AS TO COVER AT LEAST THE PORTION OF SAID BASE EXTERIOR TO THE HUB, AND SUPPORT MEANS MOUNTING SAID SECTION TO SAID FRAMEWORK, THE IMPROVEMENT WHEREIN SAID SHROUD SECTION COMPRISES A PLURALITY OF SEPARATE CONCENTRIC ANNULAR COMPONENTS ARRANGED IN MUTUAL ABUTMENT TO PRESENT A SUBSTANTIALLY CONTINUOUS SURFACE ON THE SIDE ADJACENT SAID ROTOR, SAID COMPONENTS HAVING DIVIDING EDGE AREAS WHICH OVERLAP IN RADIAL AND AXIAL DIRECTIONS SO THAT WHEN INNER AND OUTER RIMS OF SAID SECTION ARE UNDER AXIAL TENSION, THE COMPONENTS ARE SUBSTANTIALLY RIGIDLY INTERLOCKED AND SEALED AGAINST ESCAPE THEREBETWEEN THE HIGH PRESSURE GAS FROM THE ROTOR SIDE, SAID SUPPORT MEANS BEING ARRANGED TO MAINTAIN SUCH AXIAL TENSION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |