US3672162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber assembly for a gas turbine engine
Assignee: Avco Corp
•
Filing: 1971-01-28
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Granted: 1972-06-27
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Expires: 1991-01-28
Abstract
Abstract A combustion chamber liner is comprised of two telescoping sections, the leading edge of the downstream section overlapping the trailing edge of the upstream section. The end of the upstream section is provided with a plurality of peripherally spaced bosses. The outer peripheral surface of each of the bosses is grooved to accept the complementary depressed ring in the end of the larger downstream section. When cool, the dimensions of the upstream and downstream sections are such that there is a loose connection between the sections. However, the upstream section is heated more than the downstream section and causes its expansion to provide a tight fit.
Inventors
- 👤 Joseph Rygelis
- 👤 Ervin J Sweet
- 👤 Brian W Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:02
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/06; F23R3/08; Y; Y10; Y10S; Y10S285/00; Y10S285/921
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A combustor having upstream and downstream radially spaced telescoping sections, an end of said downstream section overlapping an end of said upstream section; a plurality of peripherally spaced bosses on the outer surface of said upstream section at said end thereof; a groove in each of said bosses, said grooves being peripherally aligned; a peripheral ring on the inner surface of said downstream section at the end thereof, said ring being complementary to said groove; the space between said bosses providing cooling air inlets to said combustor, said ring being dimensioned to sit loosely in said groove without sufficient clearance to permit separation of the sections under normal cool non-operating conditions, said fit becoming tight under normal hot operating conditions due to the difference in expansion of said sections.
Claim 2
Dependent Claim
129 words
A combustor having upstream and downstream radially spaced telescoping sections, an end of said downstream section overlapping an end of said upstream section; a plurality of peripherally spaced bosses on the outer surface of said upstream section at said end thereof; a groove in each of said bosses, said grooves being peripherally aligned; a peripheral ring on the inner surface of said downstream section at the end thereof, said ring being complementary to said groove; the space between said bosses providing cooling air inlets to said combustor, said ring being dimensioned to sit loosely in said groove without sufficient clearance to permit separation of the sections under normal cool non-operating conditions, said fit becoming tight under normal hot operating conditions due to the difference in expansion of said sections.
Claim 3
Dependent Claim
31 words
The invention as defined in claim 1, and a plurality of longitudinal slots through the end of said downstream section to permit the upstream and downstream section to be snap fitted.
Claim 4
Dependent Claim
16 words
The invention as defined in claim 1 wherein said ring is integral with said downstream section.
Claim 5
Dependent Claim
137 words
A combustor having upstream and downstream radially spaced telescoping sections, and end of said downstream section overlapping an end of said upstream section, the outer surface of the end of the upstream section being surrounded by the inner surface of the end of the downstream section; a plurality of peripherally spaced bosses on one of said surfaces; a groove in each of said bosses, said grooves being peripherally aligned; a peripheral ring on said other surface, said ring being complementary to said groove; the space between said bosses providing cooling air inlets to said combustor, said ring being dimensioned to fit loosely in said gRoove without sufficient clearance to permit separation of the sections under normal cool non-operating conditions, said fit becoming tight under normal hot operating conditions due to the difference in expansion of said sections.
Claim 6
Dependent Claim
137 words
A combustor having upstream and downstream radially spaced telescoping sections, and end of said downstream section overlapping an end of said upstream section, the outer surface of the end of the upstream section being surrounded by the inner surface of the end of the downstream section; a plurality of peripherally spaced bosses on one of said surfaces; a groove in each of said bosses, said grooves being peripherally aligned; a peripheral ring on said other surface, said ring being complementary to said groove; the space between said bosses providing cooling air inlets to said combustor, said ring being dimensioned to fit loosely in said gRoove without sufficient clearance to permit separation of the sections under normal cool non-operating conditions, said fit becoming tight under normal hot operating conditions due to the difference in expansion of said sections.
Claim 7
Dependent Claim
28 words
The invention as defined in claim 4, and a plurality of longitudinal slots through said other one of said surfaces to permit said sections to be snap fitted.
Claim 8
Dependent Claim
16 words
The invention as defined in claim 4 wherein said ring is integral with said other surface.
Claim 9
Dependent Claim
20 words
The invention as defined in claim 4 wherein said telescoping sections form an expansion area immediately downstream of said bosses.
References Cited (Backward Citations)
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Cited
US2658337A
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US2547619A
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US2773709A
Cited
US2876622A
Cited
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |