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US5217808A Expired / Lapsed US ⏱️ 0.0 years remaining

Water blocked cable portion and methods of making same

Assignee: Furukawa Electric North America Inc
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Filing: 1989-11-29
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Granted: 1993-06-08
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Expires: 2009-11-29
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Abstract

Abstract An optical cable portion (10), resident within a cable closure (14), is caused to receive a water blocking arrangement which is effective to prevent water, which enters an internal cable portion (24) through an unintended cut (21) in an outer jacket (18) of a cable portion (20), from entering an interior of the cable closure. A plurality of water blocking materials (30 and 32) are coaxially disposed about the outer jacket and a core tube (26) of the cable portion, respectively, and cooperate with a heat shrinkable plastic tube (34) which substantially covers the water blocking materials to prevent the movement of water from the internal cable portion past the water blocking materials.

Inventors

  • 👤 Gary S. Cobb

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 13:42
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/22; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4471; G02B6/4476; G02B6/4401; G02B6/4429; G02B6/44384; G02B6/44775; G02B6/4479; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49885; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2947; Y10T428/2958; Y10T428/2964

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 240 words
A water blocked optical fiber cable portion, which comprises: a core comprising at least one optical fiber; a longitudinally extending tube in which said core is disposed and from which an end portion of said core extends; a longitudinally extending inner jacket coaxially disposed about said tube and from which an end portion of the tube extends; a longitudinally extending metallic shield coaxially disposed about said inner jacket; means including a ground wire connected to said shield for establishing a ground connection to said shield; a longitudinally extending outer jacket which is coaxially disposed about said metallic shield and from which an end portion of said metallic shield extends; a water blocking material disposed about an outer surface of an end portion of said outer jacket adjacent to said end portion of said metallic shield; a disc of plastic material disposed adjacent to said end portion of said metallic shield and having openings through which said tube and ground wire extend; and a plastic membrane disposed about a cable end portion and in compressive engagement with said water blocking material and said disc wherein the compressive engagement of the plastic membrane is effective to provide a water blocking seal between a portion of an inner surface of said plastic membrane and an outer surface of said disc and between a portion of an inner surface of said plastic membrane and a portion of said outer surface of said outer jacket.
Claim 2
Dependent Claim 240 words
A water blocked optical fiber cable portion, which comprises: a core comprising at least one optical fiber; a longitudinally extending tube in which said core is disposed and from which an end portion of said core extends; a longitudinally extending inner jacket coaxially disposed about said tube and from which an end portion of the tube extends; a longitudinally extending metallic shield coaxially disposed about said inner jacket; means including a ground wire connected to said shield for establishing a ground connection to said shield; a longitudinally extending outer jacket which is coaxially disposed about said metallic shield and from which an end portion of said metallic shield extends; a water blocking material disposed about an outer surface of an end portion of said outer jacket adjacent to said end portion of said metallic shield; a disc of plastic material disposed adjacent to said end portion of said metallic shield and having openings through which said tube and ground wire extend; and a plastic membrane disposed about a cable end portion and in compressive engagement with said water blocking material and said disc wherein the compressive engagement of the plastic membrane is effective to provide a water blocking seal between a portion of an inner surface of said plastic membrane and an outer surface of said disc and between a portion of an inner surface of said plastic membrane and a portion of said outer surface of said outer jacket.
Claim 3
Dependent Claim 18 words
The optical fiber cable portion of claim 1, wherein said plastic membrane is a heat shrinkable plastic tube.
Claim 4
Dependent Claim 18 words
The optical fiber cable portion of claim 2, wherein said water blocking material is a water blocking tape.
Claim 5
Dependent Claim 30 words
The optical fiber cable portion of claim 1, further comprising a second water blocking material comprising a water blocking polyurethane polymer disposed about said disc adjacent to said outer jacket.
Claim 6
Dependent Claim 21 words
The optical fiber cable portion of claim 4, wherein said first water blocking material comprises a water blocking polyurethane polymer material.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-06-07 1996-12-07 1997-06-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-06-07 2000-12-07 2001-06-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-06-07 2004-12-07 2005-06-08 $7700.00 Window Closed / Lapsed

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