Patent US3778188A successfully refreshed from Google Patents.
US3778188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled turbine rotor and its manufacture
Assignee: Motors Liquidation Co
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Filing: 1972-09-11
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Granted: 1973-12-11
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Expires: 1992-09-11
Abstract
Abstract An integral cast turbine rotor wheel includes a disk and porous blades extending from the disk and into the rim of the disk, the disk defining cooling air entrance ports communicating with the porous blades so that cooling air may be circulated through them. The method of manufacture of the wheel includes providing cores defining air ports and blades, the blade portion of each core being porous, placing the cores in a mold shaped to conform to the wheel and pouring metal to define the cast body. The cores are then removed and any necessary machining of the wheel is performed.
Inventors
- 👤 R Aspinwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:31
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/182; F01D5/183; F01D5/34; F05; F05D; F05D2230/00; F05D2230/20; F05D2230/21; F05D2300/00; F05D2300/50; F05D2300/514
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A bladed turbine rotor element comprising, in combination, a solid disk having a rim portion and an annular row of porous blades integral with the disk, each blade including a porous airfoil portion projecting from the rim and a porous base portion extending into the rim; the rim defining circumferentially spaced air entrance ports each coummunicating with the exterior of the disk and with the base portion of a blade; the said rotor element being unitarily cast as an integral piece.
Claim 2
Dependent Claim
81 words
A bladed turbine rotor element comprising, in combination, a solid disk having a rim portion and an annular row of porous blades integral with the disk, each blade including a porous airfoil portion projecting from the rim and a porous base portion extending into the rim; the rim defining circumferentially spaced air entrance ports each coummunicating with the exterior of the disk and with the base portion of a blade; the said rotor element being unitarily cast as an integral piece.
Claim 3
Dependent Claim
86 words
A bladed turbine rotor element comprising, in combination, a solid disk having a rim portion and an annular row of porous blades integral with the disk, each blade including a porous airfoil portion projecting from the rim and a porous base portion extending into the rim; the rim surrounding the base portion and defining circumferentially spaced air entrance ports each communicating with the exterior of the disk and with the base portion of a blade; the said rotor element being unitarily cast as an integral piece.
Claim 4
Dependent Claim
86 words
A bladed turbine rotor element comprising, in combination, a solid disk having a rim portion and an annular row of porous blades integral with the disk, each blade including a porous airfoil portion projecting from the rim and a porous base portion extending into the rim; the rim surrounding the base portion and defining circumferentially spaced air entrance ports each communicating with the exterior of the disk and with the base portion of a blade; the said rotor element being unitarily cast as an integral piece.
Claim 5
Independent Claim
169 words
A method of manufacturing an integral bladed turbine rotor element with a solid disk, porous blades, and air entrance ports in the disk communicating with the blades, the method comprising providing a mold with a cavity corresponding in form to the rotor element; providing cores each corresponding in form to at least one blade and a corresponding port, each core having a porous portion corresponding to the blade and a solid portion defining the port; disposing the cores in place in the mold; and pouring molten metal into the mold so as to fill the pores in the porous portions of the core and fill the remainder of the mold cavity around the solid portion of the cores and the base portion of the porous blades to provide the solid disk integral with the blades; removing the cast element from the mold; and removing the core material from the blades and the ports to leave porous blades extending from the disk and into the disk communicating with the ports.
Claim 6
Independent Claim
169 words
A method of manufacturing an integral bladed turbine rotor element with a solid disk, porous blades, and air entrance ports in the disk communicating with the blades, the method comprising providing a mold with a cavity corresponding in form to the rotor element; providing cores each corresponding in form to at least one blade and a corresponding port, each core having a porous portion corresponding to the blade and a solid portion defining the port; disposing the cores in place in the mold; and pouring molten metal into the mold so as to fill the pores in the porous portions of the core and fill the remainder of the mold cavity around the solid portion of the cores and the base portion of the porous blades to provide the solid disk integral with the blades; removing the cast element from the mold; and removing the core material from the blades and the ports to leave porous blades extending from the disk and into the disk communicating with the ports.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |