US3982854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction welded metallic turbomachinery blade element
Assignee: General Electric Co
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Filing: 1973-06-18
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Granted: 1976-09-28
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Expires: 1993-06-18
Abstract
Abstract A friction welded metallic article such as a fluid directing element for turbomachinery apparatus has a cast airfoil and a wrought base joined by friction welding. One such article having a hollow interior portion is made from a hollow or cored casting and a wrought base member. There is provided a metal airfoil casting having a hollow interior portion and an enlarged foot including an interface portion. Also provided is a wrought metal base portion including an interface portion. Interface surfaces of the interface portions are placed in spaced apart opposed relationship and then the airfoil casting and the wrought base member are friction welded at their interface portions.
Inventors
- 👤 Thomas F. Berry
- 👤 Ronald G. Rajala
- 👤 Harold L. Mullins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:27
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; B; B23; B23P; B23P15/00; B23P15/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
A metallic fluid directing element for turbomachinery apparatus comprising: an airfoil having a cast alloy structure; and a base having a wrought alloy structure; the airfoil and base being joined at a friction welded joint characterized by a solid state, forged structure with a narrow heat affected zone.
Claim 2
Dependent Claim
48 words
A metallic fluid directing element for turbomachinery apparatus comprising: an airfoil having a cast alloy structure; and a base having a wrought alloy structure; the airfoil and base being joined at a friction welded joint characterized by a solid state, forged structure with a narrow heat affected zone.
Claim 3
Dependent Claim
14 words
The article of claim 1 in which the airfoil includes a hollow interior portion.
Claim 4
Dependent Claim
17 words
The article of claim 2 in which a liner insert is positioned within the hollow interior portion.
Claim 5
Dependent Claim
34 words
The article of claim 1 in which both the airfoil and the base are of a high temperature operating superalloy based on an element selected from the group consisting of Ni, Co and Fe.
Claim 6
Dependent Claim
22 words
The article of claim 4 in which the alloy of the airfoil and of the base are based on the same element.
Claim 7
Dependent Claim
11 words
The article of claim 5 in which the element is Ni.
References Cited (Backward Citations)
US2431660A
Cited
US2749029A
Cited
GB648234A
Cited
US2767460A
Cited
US2807435A
Cited
US2888239A
Cited
DE1426849A1
Cited
US3394918A
Cited
US3549273A
Cited
US3700348A
Cited
US3768147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |