US3742703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable geometry combustor construction
Assignee: Avco Corp
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Filing: 1971-10-26
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Granted: 1973-07-03
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Expires: 1991-10-26
Abstract
Abstract The combustion chamber for a gas turbine engine is constructed of a plurality of spaced telescoping sections, the gap between the sections providing an inlet for the introduction of cooling air. A flexible joint between the overlapping portions of the telescoped sections permits each section to expand and contract with low constraint. This results in a change in the size of the air inlet gap, and thus controls the amount of air introduced to the combustor under varying temperature conditions. The flexible joint comprises an annular ring with a plurality of flexible axially extending circumferentially spaced fingers. The ring is connected to one section, the fingers to the other, the space between the fingers permitting the flow of air to an air inlet gap in which a circumferentially disposed corrugated ring is mounted for providing a minimum spacing between the sections.
Inventors
- 👤 J Melconian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:46
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/26; F23R3/04; F23R3/06; F23R3/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
A combustor comprising: first and second radially spaced, longitudinally overlapping telescoPing sections, the space between said sections providing an inlet for the admission of air to the interior of said sections; a joint between said sections for interconnecting said sections, said joint comprising an annular ring, a plurality of circumferentially aligned, axially extending flexible fingers projecting from said ring, said ring being connected to one of said sections, the distal end of each of said fingers being connected to the other of said sections, said annular ring permitting the passage of air to said inlet, the flexing of said fingers permitting the relative radial expansion of the inner of said sections with respect to the outer of said sections; and means for limiting the minimum size of said inlet comprising a corrugated ring affixed to one of said sections within said inlet, the corrugations of said ring extending axially, the depth of said corrugation being equal to said minimum size.
Claim 2
Dependent Claim
160 words
A combustor comprising: first and second radially spaced, longitudinally overlapping telescoPing sections, the space between said sections providing an inlet for the admission of air to the interior of said sections; a joint between said sections for interconnecting said sections, said joint comprising an annular ring, a plurality of circumferentially aligned, axially extending flexible fingers projecting from said ring, said ring being connected to one of said sections, the distal end of each of said fingers being connected to the other of said sections, said annular ring permitting the passage of air to said inlet, the flexing of said fingers permitting the relative radial expansion of the inner of said sections with respect to the outer of said sections; and means for limiting the minimum size of said inlet comprising a corrugated ring affixed to one of said sections within said inlet, the corrugations of said ring extending axially, the depth of said corrugation being equal to said minimum size.
Claim 3
Dependent Claim
153 words
A combustor comprising: an upstream section and a downstream section, said upstream section being telescoped into said downstream section and being radially spaced therefrom, the overlapping ends of said sections being interconnected by a flexible joint, said flexible joint comprising a ring connected to the periphery of the downstream section, a plurality of axially extending, circumferentially aligned flexible fingers projecting from said ring, the distal end of each of said fingers being connected to the periphery of said upstream section, whereby said joint permits the radial expansion of said upstream section with respect to said downstream section when said sections are heated, whereby the radial space between said sections is varied as a function of temperature, and means for limiting the minimum sapce between said sections comprising a ring affixed to said upstream section in said space, said ring having axial corrugations, the depth of said corrugations being equal to said minimum space.
Claim 4
Dependent Claim
153 words
A combustor comprising: an upstream section and a downstream section, said upstream section being telescoped into said downstream section and being radially spaced therefrom, the overlapping ends of said sections being interconnected by a flexible joint, said flexible joint comprising a ring connected to the periphery of the downstream section, a plurality of axially extending, circumferentially aligned flexible fingers projecting from said ring, the distal end of each of said fingers being connected to the periphery of said upstream section, whereby said joint permits the radial expansion of said upstream section with respect to said downstream section when said sections are heated, whereby the radial space between said sections is varied as a function of temperature, and means for limiting the minimum sapce between said sections comprising a ring affixed to said upstream section in said space, said ring having axial corrugations, the depth of said corrugations being equal to said minimum space.
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |