US3885087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air tight dam for communication cables
Assignee: Fujikura Ltd
•
Filing: 1973-07-17
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Granted: 1975-05-20
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Expires: 1993-07-17
Abstract
Abstract In forming an air tight dam at a connecting zone of two communication cables or an opened zone of a cable sheath, slit spring sleeves capable of compressing the sheath and the insulated conductor body are inserted in an outer sleeve which covers the connecting zone or the opened zone of the sheath. The slit spring sleeves are first inserted into the outer sleeve while maintained in the enlarged state. A room-temperature setting resin exhibiting rubber-like elasticity after setting is poured to fill the slit spring sleeves and to set therein. Then, the means for enlarging the slit spring sleeves is released to compress the interior of the dam.
Inventors
- 👤 Toshihisa Takada
- 👤 Yukio Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:03
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/10; H02G15/117; H02G15/003; H02G15/18; H02G15/192
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A CONNECTING ZONE CONNECTING TWO INSULATED COMMUNICATION CABLES, EACH OF SAID CABLES COMPRISING AN ELECTRICALLY ISULATING SHEATH SURROUNDING A BUNDLE OF ELECTRICALLY ISULATED CONDUCTOR WIRES, AND PROVIDING AN AIR TIGHT CONNECTING ZONE AROUND THE CONNECTION OF THE CABLES WHICH COMPRISES A POLYETHYLENE OUTER SLEEVE SURROUNDING SAID CONNECTING ZONE AND FIXED TO EACH OF SAID ELECTRICALLY INSULATING SHEATHS BY A PAIR OF SPACER MEANS WELDED TO SAID INSULATING SHEATHS AND TO SAID OUTER SLEEVE, AND INNER SPRING SLEEVE MEANS DISPOSED INWARDLY OF SAID POLYETHYLENE OUTER SLEEVE AND SURROUNDING THE CONNECTION ZONE OF THE CUMMUNICATION CABLES, SAID CONNECTING ZONE BEING FILLED WITH A SYNTHETIC RESIN HAVING A RUBBER-LIKE ELASTICITY.
Claim 2
Dependent Claim
107 words
A CONNECTING ZONE CONNECTING TWO INSULATED COMMUNICATION CABLES, EACH OF SAID CABLES COMPRISING AN ELECTRICALLY ISULATING SHEATH SURROUNDING A BUNDLE OF ELECTRICALLY ISULATED CONDUCTOR WIRES, AND PROVIDING AN AIR TIGHT CONNECTING ZONE AROUND THE CONNECTION OF THE CABLES WHICH COMPRISES A POLYETHYLENE OUTER SLEEVE SURROUNDING SAID CONNECTING ZONE AND FIXED TO EACH OF SAID ELECTRICALLY INSULATING SHEATHS BY A PAIR OF SPACER MEANS WELDED TO SAID INSULATING SHEATHS AND TO SAID OUTER SLEEVE, AND INNER SPRING SLEEVE MEANS DISPOSED INWARDLY OF SAID POLYETHYLENE OUTER SLEEVE AND SURROUNDING THE CONNECTION ZONE OF THE CUMMUNICATION CABLES, SAID CONNECTING ZONE BEING FILLED WITH A SYNTHETIC RESIN HAVING A RUBBER-LIKE ELASTICITY.
Claim 3
Dependent Claim
42 words
The connecting zone of claim 1, wherein said outer sleeve and said inner spring sleeve means aDdditionally contain sealable inlets and outlets for filling said connecting zone with said resin permitting displacement of any air in said connecting zone during said filling.
Claim 4
Dependent Claim
17 words
The connecting zone of claim 2, wherein said inner spring sleeve means is a slit spring sleeve.
Claim 5
Dependent Claim
33 words
The connecting zone of claim 1, wherein said spring sleeve means comprises a slit spring sleeve having a plurality of springs bridging said slits permitting radial expansion and compression of said spring sleeve.
Claim 6
Dependent Claim
51 words
The connecting zone of claim 1 wherein said spring sleeve means comprises a slit spring sleeve and a slit spring ring surrounds said spring sleeve permitting radial expansion and compression of said spring sleeve, the slits of said slit spring sleeve means and of said slit spring ring being oppositely disposed.
Claim 7
Dependent Claim
21 words
The connecting zone of claim 1, wherein said inner spring sleeve means comprises a plurality of axially spaced inner spring sleeves.
Claim 8
Dependent Claim
41 words
The connecting zone of claim 6, wherein said inner spring sleeve means comprises a spring sleeve surrounding the insulating sheath of each of said communication cables and a central spring sleeve surrounding the connection of the bundle of insulating conductor wires.
References Cited (Backward Citations)
US3678175A
Cited
US3795758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |