US4323873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse
Assignee: Mitsubishi Electric Corp
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Filing: 1980-07-18
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Granted: 1982-04-06
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Expires: 2000-07-18
Abstract
Abstract A fuse link is formed to have an arc extinguishing chamber and a cooling chamber contiguously disposed. A sealing member is disposed between the two chambers to provide hermetical sealing of the joint formed therebetween.
Inventors
- 👤 Michiyasu Nounen
- 👤 Yukio Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:17
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/43; H01H85/38; H01H85/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
A fuse comprising a hollow outer housing forming an arc extinguishing chamber interiorly thereof, said housing having a flange at one end thereof; first and second spaced electrical contacts secured to said outer housing; a fusible member electrically connecting said first and second contacts, said fusible member, upon fusing, causing an arc to be generated within said arc extinguishing chamber; means for generating an arc extinguishing gas within said arc extinguishing chamber upon fusing of said fusible member; means forming a cooling chamber disposed contiguously to said arc extinguishing chamber and cooling thereon said arc extinguishing gas, said cooling chamber means having a surface confronting said housing flange and being spaced-apart therefrom; and a sealing member disposed between said cooling chamber means confronting surface and said housing flange.
Claim 2
Dependent Claim
128 words
A fuse comprising a hollow outer housing forming an arc extinguishing chamber interiorly thereof, said housing having a flange at one end thereof; first and second spaced electrical contacts secured to said outer housing; a fusible member electrically connecting said first and second contacts, said fusible member, upon fusing, causing an arc to be generated within said arc extinguishing chamber; means for generating an arc extinguishing gas within said arc extinguishing chamber upon fusing of said fusible member; means forming a cooling chamber disposed contiguously to said arc extinguishing chamber and cooling thereon said arc extinguishing gas, said cooling chamber means having a surface confronting said housing flange and being spaced-apart therefrom; and a sealing member disposed between said cooling chamber means confronting surface and said housing flange.
Claim 3
Dependent Claim
13 words
The fuse according to claim 1 wherein said sealing member is a packing.
Claim 4
Dependent Claim
17 words
The fuse according to claim 1 wherein said sealing member is an O-ring formed of nitrile rubber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |