Patent US3339833A successfully refreshed from Google Patents.
US3339833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial fluid flow machine such as a compressor or turbine
Assignee: Rolls Royce PLC
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Filing: 1965-03-19
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Granted: 1967-09-05
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Bill Arthur
- 👤 Steel Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/04; F01D9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
AN AXIAL FLUID FLOW MACHINE COMPRISING CONCENTRIC INNER AND OUTER ANNULAR MOUNTING MEMBERS, ANGULARLY SPACED APART DOVE-TAIL SLOTS IN EACH SAID MOUNTING MEMBER, THE SLOTS IN ONE MOUNTING MEMBER BEING INCLINED AND OPPOSITELY DISPOSED FROM THE OUTER AND INNER SIDES OF THE SUPPORT MEMBERS WITH RESPECT TO THE SLOTS IN THE OTHER MOUNTING MEMBER, A PLURALITY OF RADIALLY DISPOSED BLADES EXTENDING BETWEEN SAID MEMBERS, EACH BLADE HAVING A WORKING PORTION AND HAVING A ROOT PORTION AT EACH END THEREOF, THE ROOT PORTIONS OF EACH BLADE BEING OF DOVE-TAIL SHAPE AND BEING DISPOSED WITHIN AND EXTENDING RADIALLY THROUGH SAID DOVE-TAIL SLOTS TO LOCK AND SUPPORT THE BLADES AGAINST MOVEMENT RADIALLY AND AXIALLY, SAID ROOT PORTIONS PROJECTING RADIALLY FROM THE SURFACES OF SAID MOUNTING MEMBERS REMOTE FROM THE WORKING PORTION OF EACH BLADE, AND BEING BONDED TO THE SAID SURFACES OF THE MOUNTING MEMBERS.
Claim 2
Dependent Claim
142 words
AN AXIAL FLUID FLOW MACHINE COMPRISING CONCENTRIC INNER AND OUTER ANNULAR MOUNTING MEMBERS, ANGULARLY SPACED APART DOVE-TAIL SLOTS IN EACH SAID MOUNTING MEMBER, THE SLOTS IN ONE MOUNTING MEMBER BEING INCLINED AND OPPOSITELY DISPOSED FROM THE OUTER AND INNER SIDES OF THE SUPPORT MEMBERS WITH RESPECT TO THE SLOTS IN THE OTHER MOUNTING MEMBER, A PLURALITY OF RADIALLY DISPOSED BLADES EXTENDING BETWEEN SAID MEMBERS, EACH BLADE HAVING A WORKING PORTION AND HAVING A ROOT PORTION AT EACH END THEREOF, THE ROOT PORTIONS OF EACH BLADE BEING OF DOVE-TAIL SHAPE AND BEING DISPOSED WITHIN AND EXTENDING RADIALLY THROUGH SAID DOVE-TAIL SLOTS TO LOCK AND SUPPORT THE BLADES AGAINST MOVEMENT RADIALLY AND AXIALLY, SAID ROOT PORTIONS PROJECTING RADIALLY FROM THE SURFACES OF SAID MOUNTING MEMBERS REMOTE FROM THE WORKING PORTION OF EACH BLADE, AND BEING BONDED TO THE SAID SURFACES OF THE MOUNTING MEMBERS.
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |