Patent US3304055A successfully refreshed from Google Patents.
US3304055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor
Assignee: Rolls Royce PLC
•
Filing: 1965-08-19
•
Granted: 1967-02-14
•
Expires: 1985-08-19
Abstract
No abstract record available.
Inventors
- 👤 Britt Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:54
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3061; F01D5/02; F01D5/08; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A ROTOR FOR AN AXIAL FLUID FLOW MACHINE COMPRISING A ROTOR DISC, A PLURALITY OF RADIALLY EXTENDING BLADES WHICH ARE BONDED TO SAID DISC, SAID BLADES HAVING ROOT PORTIONS ABUTTING ONE ANOTHER, UPSTREAM AND DOWNSTREAM WALL MEMBERS AT THE RADIALLY INNER END OF EACH BLADE DEFINING THEREBETWEEN A SLOT WITHIN WHICH THE PERIPHERY OF THE DISC IS DISPOSED, THE PERIPHERY OF SAID DISC EXTENDING FOR LESS THAN THE FULL RADIAL DEPTH OF SAID SLOT TO THEREBY DEFINE AN ANNULAR COOLING AIR CHANNEL BETWEEN THE PERIPHERY OF THE DISC AND THE SLOTS IN SAID BLADES, THE DOWNSTREAM WALL MEMBERS OF ADJACENT BLADES ABUTTING TO SEAL SAID COOLING AIR CHANNEL AND THE UPSTREAM WALL MEMBERS OF ADJACENT BLADES DEFINING THEREBETWEEN AXIAL FLOW APERTURES WHICH LEAD COOLING AIR INTO SAID COOLING AIR CHANNEL, SAID ROOT PORTIONS OF THE BLADES HAVING PORTS THEREIN COMMUNICATING WITH SAID CHANNEL AND BY WHICH THE COOLING AIR MAY LEAVE SAID CHANNEL.
Claim 2
Dependent Claim
153 words
A ROTOR FOR AN AXIAL FLUID FLOW MACHINE COMPRISING A ROTOR DISC, A PLURALITY OF RADIALLY EXTENDING BLADES WHICH ARE BONDED TO SAID DISC, SAID BLADES HAVING ROOT PORTIONS ABUTTING ONE ANOTHER, UPSTREAM AND DOWNSTREAM WALL MEMBERS AT THE RADIALLY INNER END OF EACH BLADE DEFINING THEREBETWEEN A SLOT WITHIN WHICH THE PERIPHERY OF THE DISC IS DISPOSED, THE PERIPHERY OF SAID DISC EXTENDING FOR LESS THAN THE FULL RADIAL DEPTH OF SAID SLOT TO THEREBY DEFINE AN ANNULAR COOLING AIR CHANNEL BETWEEN THE PERIPHERY OF THE DISC AND THE SLOTS IN SAID BLADES, THE DOWNSTREAM WALL MEMBERS OF ADJACENT BLADES ABUTTING TO SEAL SAID COOLING AIR CHANNEL AND THE UPSTREAM WALL MEMBERS OF ADJACENT BLADES DEFINING THEREBETWEEN AXIAL FLOW APERTURES WHICH LEAD COOLING AIR INTO SAID COOLING AIR CHANNEL, SAID ROOT PORTIONS OF THE BLADES HAVING PORTS THEREIN COMMUNICATING WITH SAID CHANNEL AND BY WHICH THE COOLING AIR MAY LEAVE SAID CHANNEL.
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) | 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 |