Patent US4472702A successfully refreshed from Google Patents.
US4472702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedging device and transformer including same
Assignee: ABB Norden Holding AB
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Filing: 1982-04-12
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Granted: 1984-09-18
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Expires: 2002-04-12
Abstract
Abstract A wedging device comprises at least two bodies which are movable in relation to each other, namely a first body having two diverging surfaces and a second body which is displaceable relative to the first body along one of its diverging surfaces. A heat-shrinkable casing, made for example from a tape, sheet or film of polymeric material, is arranged around the movable bodies of the device. When the device is heated, the casing shrinks, causing relative displacement between the first and second bodies and a consequent change in the outer dimensions of the device.
Inventors
- 👤 Alf Johansson
- 👤 Lars Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:46
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/02; F; F16; F16B; F16B2/00; F16B2/02; F16B2/14; F16B4/00; F16B4/006; H; H01; H01F; H01F27/00; H01F27/28; H01F27/30; H01F27/303; F16B2/04; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T403/00; Y10T403/16; Y10T403/48; Y10T403/76
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A wedging device comprising: at least two bodies movable to each other, and including a first body with two substantially diverging opposing surfaces and a second body displaceable relative to said first body along one of said diverging surfaces, and a heat-shrinkable casing arranged around said at least two bodies, which casing, when heated, causes relative displacement between said first and second bodies to effect an increase in the outer dimensions of the device in a direction substantially transverse to said two opposing surfaces.
Claim 2
Dependent Claim
84 words
A wedging device comprising: at least two bodies movable to each other, and including a first body with two substantially diverging opposing surfaces and a second body displaceable relative to said first body along one of said diverging surfaces, and a heat-shrinkable casing arranged around said at least two bodies, which casing, when heated, causes relative displacement between said first and second bodies to effect an increase in the outer dimensions of the device in a direction substantially transverse to said two opposing surfaces.
Claim 3
Dependent Claim
33 words
A wedging device according to claim 1, wherein said heat-shrinkable casing consists of a wrapping around said bodies of a tape or sheet of polymeric material with the ability to shrink when heated.
Claim 4
Dependent Claim
18 words
A wedging device according to claim 1, wherein said first and second bodies are made of electrically-insulating material.
Claim 5
Dependent Claim
18 words
A wedging device according to claim 2, wherein said first and second bodies are made of electrically-insulating material.
Claim 6
Dependent Claim
116 words
In an electric transformer having at least an iron core and a winding around said core, a number of wedging devices being located between said core and said winding, each said wedging device comprising: at least two bodies movable relative to each other, and including a first body with two substantially diverging opposing surfaces and a second body displaceable relative to said first body along one of said diverging surfaces; and a heat shrinkable casing arranged around said at least two bodies, said casing, when heated, causing relative displacement between said first and second bodies to effect an increase in the outer dimensions of the device in a direction substantially transverse to said two opposing surfaces.
Claim 7
Dependent Claim
116 words
In an electric transformer having at least an iron core and a winding around said core, a number of wedging devices being located between said core and said winding, each said wedging device comprising: at least two bodies movable relative to each other, and including a first body with two substantially diverging opposing surfaces and a second body displaceable relative to said first body along one of said diverging surfaces; and a heat shrinkable casing arranged around said at least two bodies, said casing, when heated, causing relative displacement between said first and second bodies to effect an increase in the outer dimensions of the device in a direction substantially transverse to said two opposing surfaces.
Claim 8
Dependent Claim
19 words
The electric transformer of claim 5 wherein said first and second body are each made of electrically insulating material.
Claim 9
Dependent Claim
38 words
An electric transformer according to claim 5 or 6 wherein said heat-shrinkable casing is a wrapping wound around said first and second bodies and made of a tape or sheet of polymeric material capable of shrinking when heated.
Claim 10
Dependent Claim
106 words
In an electric transformer having at least two concentric windings, a number of wedging devices located between said concentric windings, each said wedging device comprising: at least two bodies movable relative to one another, and including a first body with two substantially diverging opposing surfaces and a second body displaceable relative to said first body along one of said diverging surfaces; and a heat-shrinkable casing arranged around said at least two bodies, said casing, when heated, casing relative displacement between said first and second bodies to effect an increase in the outer dimensions of the device in a direction substantially transverse to said two opposing surfaces.
Claim 11
Dependent Claim
106 words
In an electric transformer having at least two concentric windings, a number of wedging devices located between said concentric windings, each said wedging device comprising: at least two bodies movable relative to one another, and including a first body with two substantially diverging opposing surfaces and a second body displaceable relative to said first body along one of said diverging surfaces; and a heat-shrinkable casing arranged around said at least two bodies, said casing, when heated, casing relative displacement between said first and second bodies to effect an increase in the outer dimensions of the device in a direction substantially transverse to said two opposing surfaces.
Claim 12
Dependent Claim
20 words
The electric transformer according to claim 8 wherein said first and second body are each made of electrically insulating material.
Claim 13
Dependent Claim
38 words
An electric transformer according to claim 8 or 13 wherein said heat-shrinkable casing is a wrapping wound around said first and second bodies and made of a tape or sheet of polymeric material capable of shrinking when heated.
References Cited (Backward Citations)
GB133933A
Cited
US1435265A
Cited
US1832616A
Cited
US2810869A
Cited
US3156885A
Cited
FR1267173A
Cited
US3139468A
Cited
US4296955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |