Cable having a branch-off region sealed with a branch-off article and method of making same

• US 4,625,073 A
• Filed: 03/11/1985
• Issued: 11/25/1986
• Est. Priority Date: 03/11/1985
• Status: Expired due to Fees

• Current Assignee: Raychem Corporation (TE Connectivity Limited)
• Original Assignee: Raychem Corporation (TE Connectivity Limited)
• Inventors: Breesch, Louis, Berrondo, Antonino
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/710,203
• Time in Patent Office: 624 Days
• Field of Search: 174/21 R, 174/71 R, 174/72 R, 174/74 A, 174/77 R, 174/87, 174/88 R, 174/92, 174/93, 174/DIG. 8, 156/49
• US Class Current: 174/72.00R
• CPC Class Codes: B29C 61/0608 characterised by the configuration or structure of the preforms
• CPC Class Codes: G02B 6/4472 Manifolds
• CPC Class Codes: H02G 15/013 Sealing means for cable inlets inlets for cables filled with, or surrounded by, gas or oil H02G15/32
• CPC Class Codes: H02G 15/1806 Heat shrinkable sleeves insulation of electrical connections using a heat shrinking insulating sleeve H01R4/72
• CPC Class Codes: Y10S 174/08 Shrinkable tubes

Abstract

A branch-off article includes a branch-off member having a body portion and at least two tubes extending from the body portion to an interior region of a splice cavity, with individual break-out members extending through the individual ones of the tubes. End portions of individual ones of the tubes are recovered and sealed to individual ones of the break-out members and the body portion is sealingly secured to a member which surrounds the splice region and the tubes.

Claims

1. In combination, a cable with a plurality of break-out members extending therefrom at a branch-off region and a branch-off article sealing the branch-off region, the branch-off article comprising:

at least two branch-off members each including a body portion and at least two tubes extending from the body portion, end portions of the tubes being formed of a dimensionally recoverable material and being remote from the body portion, individual ones of the break-out members extending through respective individual ones of the tubes, each tube having a length and flexibility such that a first tube can be bent away from the others to an extent permitting the end portion thereof to be recovered about its respective break-out member without substantially recovering end portions of the other tubes;

a recoverable member surrounding the tubes and forming a pressure seal with the body portions of the at least two branch-off members, the ends of the tubes being enclosed by the recoverable member; and

a clip secured to the recoverable member and between the body portions of the at least two branch-off members and forming a pressure seal thereat.

2. The combination as claimed in claim 1, the recoverable member being heat-recoverable.

3. The combination as claimed in claim 2, each branch-off member including a heat-activatable sealant in a vicinity of the end portions of the tubes which forms a pressure-tight seal between the tubes and their respective break-out members upon recovery of the tubes.

4. The combination as claimed in claim 1, the branch-off members each being formed of first and second parts, the first part comprising a relatively stiff tubular member which corresponds to the body portion, with the second part comprising a recoverable polymeric material which includes at least some of the plurality of tubes, the recoverable polymeric material being secured to the tubular member.

5. The combination as claimed in claim 1, the recoverable member being selected from the group consisting of a tape, a tube, and a sleeve.

6. The combination as claimed in claim 5, the recoverable member being heat-recoverable and including a heat-activatable sealant on at least a portion of an inner surface thereof confronting the body portions for sealing with the body portions.

7. The combination as claimed in claim 1, the clip being positioned around a side edge of the recoverable member.

8. The combination as claimed in claim 7, the recoverable member having a straight longitudinal axis, one end of the recoverable member being secured to the cable, an opposite end of the recoverable member being secured to the body portions of the at least two branch-off members and the clip.

9. The combination as claimed in 8, the body portions of the at least two break-off members being parallel and offset relative to one another.

10. A method of sealing a plurality of break-out members extending from a branch-off region of a pressurized cable, comprising the steps of:

disposing the break-out members through respective tubes, end portions of each tube being formed of a dimensionally recoverable material and extending from at least two body portions and being remote thereto, each tube having a length and flexibility such that a first tube can be bent away from the others to an extent permitting the end portion thereof to be recovered about its respective break-out member without substantially recovering the end portions of the other tubes;

recovering the end portion of the first tube about its respective break-out member so as to form a seal therebetween; and

surrounding the tubes with a recoverable member and a clip, the clip being disposed between the at least two body portions and being secured to the recoverable member forming a pressure seal with the body portions and the recoverable member, the end portions of the tubes being enclosed by the recoverable member and the clip.