US4687413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engine assembly
Assignee: RTX Corp
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Filing: 1985-07-31
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Granted: 1987-08-18
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Expires: 2005-07-31
Abstract
Abstract Annular, circumferentially segmented components of a gas turbine engine are secured to a support structure by C-shaped couplings which prevent movement of the components in a radial and circumferential direction. The coupling has spaced apart legs which trap the component and support structure therebetween, and a key between the legs which engages a keyway formed by cooperating slots in the component and support structure.
Inventors
- 👤 Aldo Prario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:00
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D25/00; F01D25/24; F01D25/246; F05; F05D; F05D2240/00; F05D2240/10; F05D2240/11; F16; F16B; F16B2200/00; F16B2200/69; F16B2200/71; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
212 words
A gas turbine engine assembly, comprising: (a) an annular engine case having an annular, axially extending rail thereon, said rail having a plurality of axially extending, circumferentially spaced apart slots therein; (b) an annular engine component comprising a plurality of arcuate, circumferentially disposed segments, each segment having an axially extending flange in overlapping contact with said rail, each flange having an axially extending slot therein radially aligned with one of said rail slots to form a keyway; and (c) a plurality of couplings, each coupling having two spaced apart legs, both legs extending axially from and integral with a back, said legs and back forming a C-shaped structure, wherein said overlapping portions of said rail and at least one of said segment flanges are disposed between and are contacted by said legs of one of said couplings, and said legs of said one coupling prevent relative radial movement between said rail and at least one of said flanges, and wherein each coupling has an axially extending key disposed between said legs and integral with at least one of said legs or with said back, wherein said key of one of said couplings engages one of said keyways and prevents relative circumferential movement between said rail and at least one of said flanges.
Claim 2
Dependent Claim
212 words
A gas turbine engine assembly, comprising: (a) an annular engine case having an annular, axially extending rail thereon, said rail having a plurality of axially extending, circumferentially spaced apart slots therein; (b) an annular engine component comprising a plurality of arcuate, circumferentially disposed segments, each segment having an axially extending flange in overlapping contact with said rail, each flange having an axially extending slot therein radially aligned with one of said rail slots to form a keyway; and (c) a plurality of couplings, each coupling having two spaced apart legs, both legs extending axially from and integral with a back, said legs and back forming a C-shaped structure, wherein said overlapping portions of said rail and at least one of said segment flanges are disposed between and are contacted by said legs of one of said couplings, and said legs of said one coupling prevent relative radial movement between said rail and at least one of said flanges, and wherein each coupling has an axially extending key disposed between said legs and integral with at least one of said legs or with said back, wherein said key of one of said couplings engages one of said keyways and prevents relative circumferential movement between said rail and at least one of said flanges.
Claim 3
Dependent Claim
30 words
The assembly of claim 1, wherein said engine component is a stator assembly, and each of said segments is a stator vane unit having at least one radially extending vane.
Claim 4
Dependent Claim
42 words
The assembly of claim 2, wherein adjacent vane unit flanges have an interface extending axially therebetween, and said legs of one of said couplings overlie each interface so as to prevent relative radial movement between said adjacent vane units and said rail.
Claim 5
Dependent Claim
65 words
The assembly of claim 3, wherein each coupling back has an axially facing front surface in opposing relation to said rail, and a rear surface facing axially away from said rail, said assembly including annular stop means fixed axially relative to said case and abutting said rear surface of each of said couplings to limit axially rearward movement of said couplings relative to said rail.
Claim 6
Dependent Claim
69 words
The assembly of claim 3, wherein said case rail includes an annular, radially inwardly extending lip having an axially facing front surface, and each o& said rail slots extends axially through said lip, and wherein each of said vane flanges has an axially facing rear surface which abuts said lip front surtace such that axially rearward movement of each of said vane units relative to said rail is prevented.
Claim 7
Dependent Claim
20 words
The assembly of claim 1, wherein said coupling key is integral with one of said legs and with said back.
Claim 8
Dependent Claim
58 words
The assembly of claim 1, wherein said rail and each of said segment flanges are disposed between the legs of said couplings, whereby relative radial movement between said rail and each segment is prevented, and wherein each keyway is engaged by one of said coupling keys, whereby relative circumferential movement between said rail and each segment is prevented.
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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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |