Patent US4900964A successfully refreshed from Google Patents.
US4900964A
Expired / Lapsed
US
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Pole face slot filler
Assignee: Siemens Energy Inc
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Filing: 1989-01-11
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Granted: 1990-02-13
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Expires: 2009-01-11
Abstract
Abstract A pole face slot filler (26,28) for insertion into a pole face slot formed in a pole region (18) of a generator rotor, the filler (26,28) having a U-shaped cross section and being composed of a base portion (36) and two leg portions (38) extending from the base portion (36) and forming the legs of the U-shaped cross section, wherein the filler (26,28) is configured and dimensioned to achieve a press fit in the pole face slot.
Inventors
- 👤 Sui-Chun Ying
- 👤 Robert T. Hagaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:26
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A pole face slot filler for insertion into a pole face slot formed in a pole region of a generator rotor, said filler having a U-shaped cross section and being composed of a base portion and two leg portions extending from said base portion and forming the legs of said U-shaped cross section, said leg portions extending from said base portion in the radial direction away from the axis of the rotor when inserted in the pole face slot, wherein said filler is configured and dimensioned to achieve a press fit in the pole face slot by said leg portions having laterally protruding parts at the ends thereof remote from said base portion.
Claim 2
Dependent Claim
113 words
A pole face slot filler for insertion into a pole face slot formed in a pole region of a generator rotor, said filler having a U-shaped cross section and being composed of a base portion and two leg portions extending from said base portion and forming the legs of said U-shaped cross section, said leg portions extending from said base portion in the radial direction away from the axis of the rotor when inserted in the pole face slot, wherein said filler is configured and dimensioned to achieve a press fit in the pole face slot by said leg portions having laterally protruding parts at the ends thereof remote from said base portion.
Claim 3
Dependent Claim
62 words
A filler as defined in claim 1 wherein the pole face slot has mutually opposed side walls extending in the axial and radial directions of the rotor, and said filler is dimensioned, in the region of said laterally protruding parts, to establish with the slot side walls a frictional retaining force equal to at least ten times the weight of said filler.
Claim 4
Dependent Claim
68 words
A filler as defined in claim 1 wherein the pole face slot has mutually opposed side walls extending in the axial and radial directions of the rotor, and said filler is configured such that prior to insertion of said filler in the slot, the dimension of said filler in the region of said laterally protruding parts exceeds the spacing between the slot side walls by approximately 0.1 mm.
Claim 5
Dependent Claim
28 words
A filler as defined in claim 1 having a length, in the axial direction of the rotor, which is substantially shorter than the axial dimension of the rotor.
Claim 6
Dependent Claim
96 words
In combination with a generator rotor having a pole region provided with a pole face slot, a pole face slot filler having a U-shaped cross section and being composed of a base portion and two leg portions extending from said base portion and forming the legs of said U-shaped cross section, said leg extending from said base portion in the radial direction away from the axis of the rotor, and said leg portions having laterally protruding parts at the ends thereof remote from said base portion to achieve a press fit in the pole face slot.
Claim 7
Dependent Claim
96 words
In combination with a generator rotor having a pole region provided with a pole face slot, a pole face slot filler having a U-shaped cross section and being composed of a base portion and two leg portions extending from said base portion and forming the legs of said U-shaped cross section, said leg extending from said base portion in the radial direction away from the axis of the rotor, and said leg portions having laterally protruding parts at the ends thereof remote from said base portion to achieve a press fit in the pole face slot.
Claim 8
Dependent Claim
30 words
The combination defined in claim 5 wherein said filler has a length, in the axial direction of said rotor, which is substantially shorter than the axial dimension of said rotor.
Claim 9
Dependent Claim
20 words
The combination defined in claim 6 wherein there is a plurality of said fillers installed in said pole face slot.
Claim 10
Dependent Claim
29 words
The combination defined in claim 7 further comprising a wedge disposed in said pole face slot radially outward of said fillers with respect to the axis of said rotor.
References Cited (Backward Citations)
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US2565530A
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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) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |