US3315941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerofoil blade for use in a hot fluid stream
Assignee: Rolls Royce PLC
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Filing: 1966-02-21
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Granted: 1967-04-25
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Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 Davies Glyn Twiston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:59
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/284; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
AN AEROFOIL BLADE FOR USE IN A HOT FLUID STREAM HAVING A LEADING EDGE PART AND A REMAINING PART WHICH ABUT EACH OTHER AND WHICH ARE RESPECTIVEELY PROVIDED WITH FLAT SURFACES, THE SAID PARTS ABUTTING EACH OTHER ONLY AT SAID SURFACES TO RESIST RELATIVE ROCKING THEREOF; THE LEADING EDGE PART BEING MADE OF HEAT RESISTANT CERAMIC MATERIAL WHICH HAS LOW HEAT CONDUCTIVITY AND THE SAID REMAINING PART BEING FORMED OF SHEET METAL WALL MEMBERS ONE OF WHICH IS PROVIDED WITH THE RESPECTIVE FLAT SURFACE; AND MEANS SECURING THE SAID PARTS TOGETHER WITH THE FLAT SURFACES IN FIRM ABUTMENT, SAID MEANS COMPRISING A WEDGE-SHAPED RECESS IN SAID LEADING EDGE PART WHICH TAPERS TOWARDS THE TRAILING EDGE OF THE BLADE, A WEDGESHAPED KEY MEMBER FIRMLY SECURED IN SAID RECESS, AND A THREADED MEMBER WHICH SECURES THE KEY MEMBER TO THE SHEET METAL WALL MEMBER HAVING THE SAID RESPECTIVE FLAT SURFACE; HEATING OF THE BLADE IN THE HOT FLUID STREAM INCREASING THE FORCE WITH WHICH THE LEADING EDGE PART IS HELD AGAINST THE SAID REMAINING PART SO AS FURTHER TO RESIST SAID RELATIVE ROCKING.
Claim 2
Dependent Claim
181 words
AN AEROFOIL BLADE FOR USE IN A HOT FLUID STREAM HAVING A LEADING EDGE PART AND A REMAINING PART WHICH ABUT EACH OTHER AND WHICH ARE RESPECTIVEELY PROVIDED WITH FLAT SURFACES, THE SAID PARTS ABUTTING EACH OTHER ONLY AT SAID SURFACES TO RESIST RELATIVE ROCKING THEREOF; THE LEADING EDGE PART BEING MADE OF HEAT RESISTANT CERAMIC MATERIAL WHICH HAS LOW HEAT CONDUCTIVITY AND THE SAID REMAINING PART BEING FORMED OF SHEET METAL WALL MEMBERS ONE OF WHICH IS PROVIDED WITH THE RESPECTIVE FLAT SURFACE; AND MEANS SECURING THE SAID PARTS TOGETHER WITH THE FLAT SURFACES IN FIRM ABUTMENT, SAID MEANS COMPRISING A WEDGE-SHAPED RECESS IN SAID LEADING EDGE PART WHICH TAPERS TOWARDS THE TRAILING EDGE OF THE BLADE, A WEDGESHAPED KEY MEMBER FIRMLY SECURED IN SAID RECESS, AND A THREADED MEMBER WHICH SECURES THE KEY MEMBER TO THE SHEET METAL WALL MEMBER HAVING THE SAID RESPECTIVE FLAT SURFACE; HEATING OF THE BLADE IN THE HOT FLUID STREAM INCREASING THE FORCE WITH WHICH THE LEADING EDGE PART IS HELD AGAINST THE SAID REMAINING PART SO AS FURTHER TO RESIST SAID RELATIVE ROCKING.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |