US3816642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible insulating sheath for direct buried power lines
Assignee: TDK Micronas GmbH
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Filing: 1972-06-07
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Granted: 1974-06-11
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Expires: 1992-06-07
Abstract
Abstract A substantially cylindrical or tubular insulating sheath provides a waterproof protection for a splice or connection between electrical power distribution conductors. An internal rib and shoulder configuration cooperates with the spliced conductors to seal each end of the sheath. The construction is arranged to increase the sealing forces acting upon the sheath responsive to increased pressure either inside or outside the sheath.
Inventors
- 👤 J Toedtman
- 👤 J Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/192
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
179 words
A waterproof sheath for surrounding and protecting a splice on a power distribution cable or conductor system comprising a somewhat tubular body which is open at each end, a pair of elastic cylindrical end caps, each of said caps having a large diameter open end with dimensions which snugly fit over the tubular body and an opposite end closed by a flexible wall, means for giving said conductor entrance and exit to said sheath, and means comprising a sealing tube of reduced diameter piercing the flexible wall and projecting outwardly on either side of the wall, said sealing tube having an inside diameter which is less than the outside diameter of said power conductor whereby said sealing tube forms a snug fit when the tube is slipped over said power conductor, and pressure control means inside said tubular body for reducing the probability that there will be an excessive pressure change inside said sheath, said pressure control means comprising a plurality of fins integrally formed inside said tubular body and extending inwardly to come into contact with said conductor.
Claim 2
Dependent Claim
179 words
A waterproof sheath for surrounding and protecting a splice on a power distribution cable or conductor system comprising a somewhat tubular body which is open at each end, a pair of elastic cylindrical end caps, each of said caps having a large diameter open end with dimensions which snugly fit over the tubular body and an opposite end closed by a flexible wall, means for giving said conductor entrance and exit to said sheath, and means comprising a sealing tube of reduced diameter piercing the flexible wall and projecting outwardly on either side of the wall, said sealing tube having an inside diameter which is less than the outside diameter of said power conductor whereby said sealing tube forms a snug fit when the tube is slipped over said power conductor, and pressure control means inside said tubular body for reducing the probability that there will be an excessive pressure change inside said sheath, said pressure control means comprising a plurality of fins integrally formed inside said tubular body and extending inwardly to come into contact with said conductor.
Claim 3
Dependent Claim
29 words
The sheath of claim 1, further including folding control means for causing said ribs to fold in and nest together responsive to insertion of said conductor into said sheath.
Claim 4
Dependent Claim
34 words
The sheath of claim 2, wherein said folding control means comprises a slant face on said ribs for deflecting said ribs in a given direction when said sheath is slipped on over said conductor.
Claim 5
Dependent Claim
45 words
The sheath of claim 1, further comprising alternate peripheral grooves and ribs on said member adjacent the ends thereof, and like ribs and grooves in the inner surface of said tubular outer wall adjacent said entrant portion for matingly receiving said member grooves and ribs.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |