US4728255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable stiffening disk
Assignee: General Electric Co
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Filing: 1985-02-25
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Granted: 1988-03-01
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Expires: 2005-02-25
Abstract
Abstract A removable disk for an annular casing in a turbomachine is disclosed. The disk is coaxial with the casing and slideably engagable with the casing in ambient conditions. The disk radially contacts the casing during operation so as to provide increased stiffness to the casing.
Inventors
- 👤 Ralph A. Kirkpatrick
- 👤 Gerard P. Kroger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:19
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/24; F16; F16F; F16F15/00; F16F15/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A removable stiffening member for an annular casing in a turbomachine comprising a substantially rigid disk coaxial and slideably engagable with said casing at ambient conditions, wherein said disk radially contacts said casing during turbomachine operation generally continuously along an entire circumferential surface of said casing so as to provide circumferential and axial restraint of said disk and increased stiffness to said casing.
Claim 2
Dependent Claim
63 words
A removable stiffening member for an annular casing in a turbomachine comprising a substantially rigid disk coaxial and slideably engagable with said casing at ambient conditions, wherein said disk radially contacts said casing during turbomachine operation generally continuously along an entire circumferential surface of said casing so as to provide circumferential and axial restraint of said disk and increased stiffness to said casing.
Claim 3
Dependent Claim
24 words
The removable stiffening member of claim 1, wherein said stiffening member includes positioning means for axially positioning said disk with respect to said casing.
Claim 4
Dependent Claim
83 words
A removable stiffening member for an annular casing in a turbomachine, comprising: a substantially rigid annular disk adapted to contact said casing during turbomachine operation at a multiplicity of diametrically opposed locations so as to provide circumferential and axial restraint of said disk and to provide radial support and stiffness to said casing; a bracket for axially positioning said disk; first fastening means for removably attaching said bracket to said disk; and second fastening means for removably attaching said bracket to said casing.
Claim 5
Dependent Claim
83 words
A removable stiffening member for an annular casing in a turbomachine, comprising: a substantially rigid annular disk adapted to contact said casing during turbomachine operation at a multiplicity of diametrically opposed locations so as to provide circumferential and axial restraint of said disk and to provide radial support and stiffness to said casing; a bracket for axially positioning said disk; first fastening means for removably attaching said bracket to said disk; and second fastening means for removably attaching said bracket to said casing.
Claim 6
Dependent Claim
23 words
A member, as recited in claim 3, wherein said second fastening means includes a retention pin for axially and circumferentially retaining said bracket.
Claim 7
Dependent Claim
17 words
A member, as recited in claim 3, wherein said first fastening means includes an axially directed bolt.
Claim 8
Dependent Claim
27 words
A member, as recited in claim 3, wherein said disk contacts said casing through a plurality of meshed axially directed splines on said casing and said disk.
Claim 9
Dependent Claim
41 words
A removable, substantially rigid disk adapted to contact an annular casing in a turbomachine, wherein said disk radially contacts said casing generally continuously along the entire inner circumferential surface of said casing so as to provide increased stiffness to said casing.
Claim 10
Dependent Claim
41 words
A removable, substantially rigid disk adapted to contact an annular casing in a turbomachine, wherein said disk radially contacts said casing generally continuously along the entire inner circumferential surface of said casing so as to provide increased stiffness to said casing.
Claim 11
Dependent Claim
60 words
A turbomachine including: an annular casing, said casing having a natural resonant frequency of vibration; and a substantially rigid stiffening member adapted to contact said casing during turbomachine operation at a multiplicity of diametrically opposed locations, wherein said stiffening member is effective for raising said resonant frequency so as to avoid resonant frequency vibration of said casing during turbomachine operation.
Claim 12
Dependent Claim
60 words
A turbomachine including: an annular casing, said casing having a natural resonant frequency of vibration; and a substantially rigid stiffening member adapted to contact said casing during turbomachine operation at a multiplicity of diametrically opposed locations, wherein said stiffening member is effective for raising said resonant frequency so as to avoid resonant frequency vibration of said casing during turbomachine operation.
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |