US4292010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cambered blade or vane for a gas turbine engine
Assignee: Rolls Royce PLC
•
Filing: 1979-08-22
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Granted: 1981-09-29
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Expires: 1999-08-22
Abstract
Abstract A blade or vane for a gas turbine has a cambered aerofoil made up of a plurality of single crystals of an alloy. Each crystal extends longitudinally of the aerofoil and has a predetermined three-dimensional orientation different from that of the other crystals such that it has an optimum value of a chosen property in directions longitudinal and transverse of the aerofoil.
Inventors
- 👤 Geoffrey W. Meetham
- 👤 John R. Marjoram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:51
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; F01D5/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A blade or vane for a gas turbine engine, the blade or vane having a cambered aerofoil portion comprising a plurality of single crystals of an alloy, each crystal extending longitudinally of the aerofoil and having a predetermined three-dimensional orientation different from that of the other crystals such that each such crystal has an optimum value of a chosen property in directions longitudinal and transverse of the aerofoil.
Claim 2
Dependent Claim
68 words
A blade or vane for a gas turbine engine, the blade or vane having a cambered aerofoil portion comprising a plurality of single crystals of an alloy, each crystal extending longitudinally of the aerofoil and having a predetermined three-dimensional orientation different from that of the other crystals such that each such crystal has an optimum value of a chosen property in directions longitudinal and transverse of the aerofoil.
Claim 3
Dependent Claim
18 words
A blade or vane as claimed in claim 1 and in which said chosen property is Young's modulus.
Claim 4
Dependent Claim
19 words
A blade or vane as claimed in claim 2 and in which said optimum value is a minimum value.
Claim 5
Dependent Claim
34 words
A blade or vane as claimed in claim 1 and in which said direction transverse of the blade lies parallel with that part of the mid-chord line of the aerofoil passing through the crystal.
Claim 6
Dependent Claim
44 words
A blade or vane as claimed in claim 4 and in which said crystals are orientated with their <1, 0, 0> crystallographic axes directed longitudinally of the aerofoil and parallel with that part of the mid-chord line of the aerofoil passing through the crystal.
Claim 7
Dependent Claim
28 words
A blade or vane as claimed in claim 1 and in which said crystals are separately formed and joined together by a metallurgical bond to form the aerofoil.
Claim 8
Dependent Claim
25 words
A blade or vane as claimed in claim 1 and in which said aerofoil comprising said crystals is formed integrally in a single casting process.
Claim 9
Dependent Claim
17 words
A blade or vane as claimed in claim 1 and in which there are three said crystals.
Claim 10
Dependent Claim
18 words
A blade or vane as claimed in claim 1 and in which said alloy comprises a nickel-based superalloy.
Claim 11
Dependent Claim
99 words
A superalloy gas turbine engine blade or vane having a cambered aerofoil portion, said blade or vane composed of a plurality of single superalloy crystals, each crystal extending longitudinally of the aerofoil and having a predetermined three-dimensional orientation different from that of the other crystals, each single crystal oriented such that each crystal has in those directions (1) longitudinal of the aerofoil, and (2) transverse of the aerofoil, wherein the direction is substantially parallel with that part of the mid-chord line of the aerofoil passing through the crystal an optimum value of a predetermined property in both said directions.
Claim 12
Dependent Claim
99 words
A superalloy gas turbine engine blade or vane having a cambered aerofoil portion, said blade or vane composed of a plurality of single superalloy crystals, each crystal extending longitudinally of the aerofoil and having a predetermined three-dimensional orientation different from that of the other crystals, each single crystal oriented such that each crystal has in those directions (1) longitudinal of the aerofoil, and (2) transverse of the aerofoil, wherein the direction is substantially parallel with that part of the mid-chord line of the aerofoil passing through the crystal an optimum value of a predetermined property in both said directions.
Claim 13
Dependent Claim
95 words
A thermal stress-resistant superalloy gas turbine engine blade or vane having a cambered aerofoil portion, said blade or vane composed of a plurality of single superalloy crystals, each crystal extending longitudinally of the aerofoil and having a predetermined three-dimensional orientation different from that of the other crystals, each single crystal oriented such that each crystal exhibits a low Young's modulus value in those directions (1) longitudinal of the aerofoil, and (2) transverse of the aerofoil, wherein the direction is substantially parallel with that part of the mid-chord line of the aerofoil passing through the crystal.
Claim 14
Dependent Claim
95 words
A thermal stress-resistant superalloy gas turbine engine blade or vane having a cambered aerofoil portion, said blade or vane composed of a plurality of single superalloy crystals, each crystal extending longitudinally of the aerofoil and having a predetermined three-dimensional orientation different from that of the other crystals, each single crystal oriented such that each crystal exhibits a low Young's modulus value in those directions (1) longitudinal of the aerofoil, and (2) transverse of the aerofoil, wherein the direction is substantially parallel with that part of the mid-chord line of the aerofoil passing through the crystal.
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |