US4831303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil armor tape for new bonding surface and CORONOX seal
Assignee: Siemens Energy Inc
•
Filing: 1988-01-27
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Granted: 1989-05-16
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Expires: 2008-01-27
Abstract
Abstract Improved turbine generators including stator coil bracing and methods for bonding stator coils to diamond spacers to reduce the leakage of Corona suppressive compositions, such as CORONOX®, are provided. The apparatus and methods include wrapping a portion of the stator coils coated with the Corona suppressive compositions with a reinforced layer which has been impregnated with a room-temperature polermerizing resin. The preferred constructions increase the bond strength between the coils and diamond spacers to provide a more homogeneous stator unit.
Inventors
- 👤 Charles M. Rowe
- 👤 Robert T. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:48
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/50; H02K3/505; H02K3/32; H02K3/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
In a turbine generator of the type having a stator coil disposed within a winding, said coil having a portion thereof coated with a Corona suppressive composition and disposed next to a spacer in said winding, the improvement comprising: a reinforced layer disposed around at least a part of said coated portion of said stator coil and impregnated with a room temperature polymerizing resin, said reinforced layer and polymerizing resin cured to form a bond between said spacer and said coil.
Claim 2
Dependent Claim
81 words
In a turbine generator of the type having a stator coil disposed within a winding, said coil having a portion thereof coated with a Corona suppressive composition and disposed next to a spacer in said winding, the improvement comprising: a reinforced layer disposed around at least a part of said coated portion of said stator coil and impregnated with a room temperature polymerizing resin, said reinforced layer and polymerizing resin cured to form a bond between said spacer and said coil.
Claim 3
Dependent Claim
18 words
The turbine generator of claim 1 wherein said Corona suppressive composition comprises a ceramic and a resinous solution.
Claim 4
Dependent Claim
16 words
The turbine generator of claim 1 wherein said Corona suppressive composition comprises silicon carbide and varnish.
Claim 5
Dependent Claim
13 words
The turbine generator of claim 1 wherein said reinforced layer comprises polyester fiber.
Claim 6
Dependent Claim
24 words
The turbine generator of claim 3 wherein said reinforced layer comprises polyester tape having a thickness of about 1.5 mm to about 2.5 mm.
Claim 7
Dependent Claim
21 words
The turbine generator of claim 3 wherein said reinforced layer comprises a polyester tape having a thickness of about 2.0 mm.
Claim 8
Dependent Claim
12 words
The turbine generator of claim 5 wherein said polyester tape comprises fiberglass.
Claim 9
Dependent Claim
57 words
A steam turbine generator of the type having a stator winding having a portion thereof coated with an Corona suppressive composition and disposed next to a spacer, the improvement comprising: a lapped layer of glass-filled, polyester tape disposed around said coated portion of said stator winding and impregnated with a filled epoxy resin curable at room temperatures.
Claim 10
Dependent Claim
57 words
A steam turbine generator of the type having a stator winding having a portion thereof coated with an Corona suppressive composition and disposed next to a spacer, the improvement comprising: a lapped layer of glass-filled, polyester tape disposed around said coated portion of said stator winding and impregnated with a filled epoxy resin curable at room temperatures.
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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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |