US4471008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal intermediate layer and method of making it
Assignee: MTU Aero Engines AG
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Filing: 1982-08-02
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Granted: 1984-09-11
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Expires: 2002-08-02
Abstract
Abstract A metal intermediate layer between two generally parallel thrust surfaces. At least one of the thrust surfaces is ceramic, and the surfaces are oblique to the direction of force tending to press the surfaces toward each other. The intermediate layer is formed by applying a metal powder suspension to at least one of the surfaces, and thereafter drying and if necessary heating the suspension to remove the non-metallic portion of the suspension. The surfaces may be faces of the blade root and slot, which accommodates the root, of a turbomachine.
Inventors
- 👤 Werner Huther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:23
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3084; B; B22; B22F; B22F7/00; B22F7/06; B22F7/062; B22F7/064; F01D5/3092; B22F2998/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
A method of producing an intermediate metal layer between two opposed thrust surfaces at least one of which is formed of a ceramic material, the surfaces being transverse to the direction of a force tending to press the surface toward each other, comprising the steps of: applying a suspension of metal powder in a carrier to at least one of the thrust surfaces, thereafter drying the suspension, and thereafter heating the dried suspension at a temperature which is 60% to 95% of the melting temperature of the metal to remove the non-metallic content of the suspension and leave a metal coating which permits relative movement between the thrust surface and deforms when compressed between the thrust surfaces.
Claim 2
Independent Claim
117 words
A method of producing an intermediate metal layer between two opposed thrust surfaces at least one of which is formed of a ceramic material, the surfaces being transverse to the direction of a force tending to press the surface toward each other, comprising the steps of: applying a suspension of metal powder in a carrier to at least one of the thrust surfaces, thereafter drying the suspension, and thereafter heating the dried suspension at a temperature which is 60% to 95% of the melting temperature of the metal to remove the non-metallic content of the suspension and leave a metal coating which permits relative movement between the thrust surface and deforms when compressed between the thrust surfaces.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the suspension is applied, dried, and fluted before the parts having the thrust surfaces are assembled together.
Claim 4
Dependent Claim
47 words
The method of claim 1 including the step of assembling the parts having the thrust surfaces, and thereafter applying the suspension to the edge of the space between the thrust surfaces so as to permit the suspension to be attracted between the thrust surfaces by capillary action.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the drying is effected in an inert gas atmosphere to prevent oxidation of the metal.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein the heating is effected in an inert gas atmosphere to prevent oxidation of the metal.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the carrier of the suspension is an organic liquid.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the carrier of the suspension is a lacquer.
Claim 9
Dependent Claim
28 words
The method of claim 1 wherein the carrier of the suspension is selected from the group consisting of zapon, cellulose nitrate lacquer, and a resin dissolved in alcohol.
Claim 10
Dependent Claim
40 words
The method of claim 1 wherein one of the thrust surfaces is the face of a slot in the rotating member of turbo-machine, and the other surface is the face of a root of a blade arranged in the slot.
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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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |