US4409054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for applying abradable material to a honeycomb structure and the product thereof
Assignee: RTX Corp
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Filing: 1981-01-14
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Granted: 1983-10-11
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Expires: 2001-01-14
Abstract
Abstract Honeycomb structures, such as those used in turbine engine abradable seals, are provided with a uniform density filling of a suitable abradable material. The abradable material is prepared as a tape preform using an organic binder. The preform is forced into the honeycomb using a rubber tool.
Inventors
- 👤 Edward J. Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:59
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/12; F01D11/122; F01D11/125; B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1115; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0244; B23K35/22; B23K35/24; B23K35/32; B23K35/327; B24; B24D; B24D18/00; B22F2998/00; B23K35/0233; B23K35/0238; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/28; F05D2250/283; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A method for filling a honeycomb structure comprised of a plurality of cells having a predetermined depth with an abradable material including the steps of: a. providing a composite abradable preform consisting of a layer of powdered material containing a substantial amount of braze alloy, a second layer joined to the first layer comprising a powdered abradable composition, both of said layers also containing a binder and a plasticizer and being flexible and compliant said preform having a thickness which is less than the depth of the honeycomb cells; b. placing said preform on the honeycomb structure to be filled with the braze containing surface adjacent the honeycomb; c. forcing the preform into the cells and using a disposable pliable material to force the preform into the cells braze containing surface contacts the bottom of the honeycomb cells heating the filled honeycomb to remove the binder and plasticizer and further heating to melt the braze material so as to bond the abradable material to the honeycomb structure.
Claim 2
Independent Claim
167 words
A method for filling a honeycomb structure comprised of a plurality of cells having a predetermined depth with an abradable material including the steps of: a. providing a composite abradable preform consisting of a layer of powdered material containing a substantial amount of braze alloy, a second layer joined to the first layer comprising a powdered abradable composition, both of said layers also containing a binder and a plasticizer and being flexible and compliant said preform having a thickness which is less than the depth of the honeycomb cells; b. placing said preform on the honeycomb structure to be filled with the braze containing surface adjacent the honeycomb; c. forcing the preform into the cells and using a disposable pliable material to force the preform into the cells braze containing surface contacts the bottom of the honeycomb cells heating the filled honeycomb to remove the binder and plasticizer and further heating to melt the braze material so as to bond the abradable material to the honeycomb structure.
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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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |