US3955167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated vacuum fuse assembly
Assignee: Cooper Industries LLC
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Filing: 1975-01-08
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Granted: 1976-05-04
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Expires: 1995-01-08
Abstract
Abstract Fuse adapters are connected to the contact rods of a vacuum fuse. A rubber coating is provided over the entire outer surface of the vacuum fuse, but not over the fuse adapters. An epoxy body is molded over the coated fuse and the fuse adapters. Cavities are provided in the body to define wells, the fuse adapters being exposed in the wells to permit electrical connection to the fuse through the adapters.
Inventors
- 👤 David G. Kumbera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:52
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/047; H01H85/042; H01H11/00; H01H11/0006; H01H11/0031; H01H33/00; H01H33/60; H01H33/66; H01H33/662; H01H33/66207; H01H2033/6623; H01H2085/0225; H01H85/0013; H01H85/0021; H01H85/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
An encapsulated vacuum fuse assembly comprising, in combination, a body of electrical insulating material, a vacuum fuse including a housing and a fuse element in said housing, said vacuum fuse embedded in said body and also including first and second spaced terminal means for connecting said fuse element in an electrical circuit, said body having generally close engagement over the outer surface of said vacuum fuse, a coating of flexible material extending over the housing of said vacuum fuse, said coating in intimate engagement with said body and accomodating relative expansion and contraction movement between said vacuum fuse housing and said body due to temperature variations to thereby maintain generally void free engagement therebetween, and means in said body for providing conductive access to said terminal means for making electrical connections thereto and including fuse adapter means electrically and mechanically connected to said vacuum fuse terminal means and through which current exchange to said vacuum fuse is made, means defining first and second openings in said body open to the fuse assembly ambient, and said fuse adapter means projecting into said openings for accepting external circuit connections.
Claim 2
Dependent Claim
187 words
An encapsulated vacuum fuse assembly comprising, in combination, a body of electrical insulating material, a vacuum fuse including a housing and a fuse element in said housing, said vacuum fuse embedded in said body and also including first and second spaced terminal means for connecting said fuse element in an electrical circuit, said body having generally close engagement over the outer surface of said vacuum fuse, a coating of flexible material extending over the housing of said vacuum fuse, said coating in intimate engagement with said body and accomodating relative expansion and contraction movement between said vacuum fuse housing and said body due to temperature variations to thereby maintain generally void free engagement therebetween, and means in said body for providing conductive access to said terminal means for making electrical connections thereto and including fuse adapter means electrically and mechanically connected to said vacuum fuse terminal means and through which current exchange to said vacuum fuse is made, means defining first and second openings in said body open to the fuse assembly ambient, and said fuse adapter means projecting into said openings for accepting external circuit connections.
Claim 3
Dependent Claim
17 words
The encapsulated vacuum fuse assembly of claim 1 wherein said body is made of an epoxy material.
Claim 4
Dependent Claim
44 words
The vacuum fuse assembly of claim 1 wherein said first and second openings are in the form of cavities in said body providing wells for receipt of said external circuit connections, and said fuse adapter means project into a respective one of said wells.
Claim 5
Dependent Claim
94 words
The vacuum fuse assembly of claim 1 wherein said vacuum fuse is generally elongated having a longitudinal axis and includes axially aligned, relatively spaced contact rods projecting from the opposite axial ends of said vacuum fuse housing to provide said first and second terminal means, said fuse adapter means includes generally tubular portions fitting over and electrically and mechanically connected to each of said contact rods and terminal portions electrically connected to tubular portions, and said fuse adapter means terminal portions projects from said tubular portions into said openings for accepting external circuit connections.
Claim 6
Dependent Claim
48 words
The vacuum fuse assembly of claim 4 wherein said first and second openings are in the form of cavities in said body providing wells for receipt of said external circuit connections, and said terminal portions of said fuse adapters means project into a respective one of said wells.
Claim 7
Dependent Claim
21 words
The vacuum fuse assembly of claim 4 including a coating of semi-conductive material extending over the outer surface of said body.
Claim 8
Dependent Claim
54 words
The vacuum fuse assembly of claim 4 wherein said tubular portion of said adapter means includes connecting means for establishing said connection to said terminal portion in at least one of an axially aligned relationship of said tubular and said terminal means, or in an angular relationship of said tubular and said terminal means.
References Cited (Backward Citations)
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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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |