Cable closure

• US 4,810,829 A
• Filed: 12/11/1987
• Issued: 03/07/1989
• Est. Priority Date: 12/11/1987
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Seim, William J., Rebers, Kenneth D., Rutenbeck, Mark M.
• Primary Examiner(s): NIMMO, MORRIS
• Application Number:
  US07/131,758
• Time in Patent Office: 452 Days
• Field of Search: 174/41, 174/92, 174/93, 174/91, 220/420
• US Class Current: 174/41
• CPC Class Codes: H02G 15/10 protected by boxes, e.g. by distribution, connection or junction boxes
• CPC Class Codes: H02G 15/113 Boxes split longitudinally in main cable direction
• CPC Class Codes: H02G 15/117 for multiconductor cables
• CPC Class Codes: H02G 15/192 with support means for ends of the sleeves

Abstract

A splice closure for environmental protection of aerial cable splices is provided. The splice closure includes a double-wall construction facilitating closure strength, construction and operation. A preferred construction is provided which facilitates extension of an intact closure, by means of a one-half section cut from a second, identical, closure. A trough and drain arrangement facilitates drainage of water from an interior of the closure, to the environment. Preferred orientation of an opening hinge in the closure, facilitates access to an enclosed cable splice area. A preferred arrangement is provided, for association of end cap arrangements with the closure.

Claims

1. A splice closure for providing environment protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing having a longitudinal hinge and a corresponding, generally oppositely positioned, opening seam;

said casing having a sidewall section of double-wall construction defining an inner-wall portion and an outer-wall portion, with cavity area therebetween;

said casing including first and second opposite end walls extending between said inner-wall portion and said outer-wall portion, to close ends of said double-wall construction; and

,

(b) latch means constructed and arranged for selectively retaining said casing in a closed orientation, along said opening seam.

2. A splice closure for providing environmental protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing formed of semi-cylindrical mating sections having;

longitudinal hinge means joining two longitudinal edges; and

, a corresponding generally oppositely positioned opening seam;

(i) each of said casing sections having a wall section of double-wall construction defining an inner-wall portion and an outer-wall portion with at least one cavity area therebetween;

(ii) said casing sections each including first and second opposite end walls extending between said inner-wall portion and said outer-wall portion to close ends of said cavity area; and

,

(b) latch means constructed and arranged for selectively retaining said casing in a closed orientation along said opening seam.

3. A splice closure for providing environmental protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing having a longitudinal hinge and a corresponding, generally oppositely positioned, opening seam;

said casing having a sidewall section of double-wall construction defining an inner-wall portion and an outer-wall portion, with cavity area therebetween;

(b) latch means constructed and arranged for selectively retaining said casing in a closed orientation, along said opening seam; and

,

(c) drainage means constructed and arranged for draining water outwardly from an interior of said casing.

4. A splice closure according to claim 3 wherein:

(a) said cylindrical casing has a central portion and first and second opposite end portions;

(i) said cylindrical casing having first and second sections separated by a central, circumferential, transition portion; and

,

(b) said drainage means includes a first drainage aperture area in said first casing section, and a second drainage aperture area in second casing section.

5. A splice closure according to claim 4, wherein:

(a) said drainage means includes a flow-directing arrangement constructed and arranged to direct water in said casing first section toward said first drainage aperture area, and to direct water in said casing second section toward said second drainage aperture area.

6. A splice closure according to claim 5 wherein:

(a) said first drainage aperture area is oriented in said casing substantially adjacent to said first end portion, and said second drainage aperture area is oriented in said casing substantially adjacent said second end portion; and

,

(b) said flow-directing means includes;

a first trough extending from said transition portion to said first drainage aperture area; and

, a second trough extending from said transition portion to said second drainage aperture area.

7. A splice closure for providing environmental protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing having a longitudinal hinge and a corresponding, generally oppositely positioned, opening seam;

said casing having a sidewall section of double-wall construction defining an inner-wall portion and an outer-wall portion, with cavity area therebetween;

(b) latch means constructed and arranged for selectively retaining said casing in a closed orientation, along said opening seam; and

,

(c) hanger means constructed and arranged for selectively mounting said casing to a support cable.

8. A splice closure according to claim 7 wherein:

(a) said longitudinal hinge defines a hinge line dividing said casing into first and second, generally semi-cylindrical, casing members; and

,

(b) said hanger means defines an area of attachment of said casing first member to said support cable oriented between about 125° and

145°

, radially, around said casing outer-wall portion, and in said casing first member, from said hinge line.

9. A splice closure according to claim 8 wherein:

(a) said hanger means comprises a rib/groove arrangement on said casing outer-wall oriented to define a longitudinal groove between a pair of longitudinal ribs;

said longitudinal groove generally being aligned with, and extending along, said area of attachment;

said groove being positioned closer to said opening seam then to said hinge.

10. A splice closure for providing environmental protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing having a longitudinal hinge and a corresponding, generally oppositely positioned, opening seam;

said casing having a sidewall section of double-wall construction defining an inner-wall portion and an outer-wall portion, with cavity area therebetween;

said cylindrical casing further having a central portion and first and second opposite end portions;

(i) said cylindrical casing central portion having a central, circumferential, cut-line portion, and said casing being readily separable along said cut-line portion into separable sections each of which has an end portion thereon;

(ii) each casing separable section having an end-portion-receiving area therein substantially adjacent said cut-line portion and sized for receipt of an end portion of an intact closure therein, after said cylindrical casing has been separated along said cut-line portion;

(b) whereby an intact first splice closure can be selectively extended by a casing section through attachment to the intact casing of a casing section generated by separating a second splice closure along said cut-line portion.

11. The splice closure according to claim 10 wherein:

(a) said casing includes interlocking means constructed and arranged for providing interlocking connection between a casing end portion-receiving area, of a casing section generated by separation of a casing along said cut line, and a casing end portion of an intact closure selectively received therein.

12. The splice closure according to claim 11, wherein:

(a) said interlocking means includes a first tongue and groove arrangement having;

a groove arrangement on a first one of said casing end portions and, a tongue arrangement on first section end portion-receiving area; and

,

(b) said interlocking means includes a second tongue and groove arrangement having;

a groove arrangement on a second one of said casing end portions and, a tongue arrangement on second section end portion-receiving area.

13. A splice closure for providing environment protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing having a longitudinal hinge and corresponding, generally oppositely positioned, opening seam;

said casing having a sidewall section of double-wall construction defining an inner-wall portion and an outer-wall portion, with cavity area therebetween;

said cylindrical casing further having a central portion and first and second opposite end portions;

(i) said first end portion having an end cap arrangement-receiving area therein;

(ii) said second end portion having an end cap arrangement-receiving area therein;

(iii) said longitudinal hinge defining an upper casing half, which includes parts of said first and second end portions, and a lower casing half, which includes parts of said first and second end portions; and

,

(b) retaining means constructed and arranged for securing associated end cap arrangements in said upper casing half and in said first and second end portions.

14. A splice closure for providing environmental protection to an aerial splice;

said splice closure comprising;

(a) an elongate generally cylindrical casing having a longitudinal hinge and a corresponding, generally oppositely positioned, opening seam;

said casing having a sidewall section of double-wall construction defining an inner-wall portion and an outer-wall portion, with a cavity therebetween; and

, said casing having a central portion and first and second opposite end portions;

(i) said casing central portion having first and second sections separated by a central portion;

(b) drainage means constructed and arranged for drainage water outwardly from an interior of said casing;

(i) said drainage means including;

a first drainage aperture area oriented in said first casing section substantially adjacent to said first end portion; and

, a second drainage aperture area oriented in said second casing section substantially adjacent to said second end portion;

(ii) said drainage means further including a first trough extending from said central portion to said first drainage aperture area, and a second trough extending from said central portion to said second drainage aperture area;

(c) hanger means constructed and arranged for selectively mounting said casing to a support cable; and

,

(d) latch means constructed and arranged for selectively retaining said closure in a closed orientation, along said opening seam.

15. A splice closure according to claim 14 wherein:

(a) said central portion comprises cut-line portion;

said casing being readily separable along said cut-line portion to form first and second separable sections each of which has an end portion thereon;

(i) said cylindrical casing central portion first section having an end portion receiving area therein substantially adjacent said cut-line portion and sized for receipt of a first end portion, of an intact closure, therein after said cylindrical casing has been separated along said cut-line portion; and

,

(ii) said cylindrical casing central portion second section having an end portion receiving area therein substantially adjacent said cut-line portion and sized for receipt of a second end portion, of an intact closure, therein after said cylindrical casing has been separated along said cut-line portion;

(b) whereby an intact first splice closure can be selectively extended by a casing section through attachment to the intact closure of a casing section generated by dividing a second splice closure along said cut-line portion.

16. The splice closure according to claim 15 wherein:

(a) said casing includes interlocking means constructed and arranged for providing interlocking connection between a casing of an intact closure and a casing section of a separated closure.

17. A splice closure according to claim 16 wherein:

(a) a first one of said separable sections comprises a first section with an end portion thereon; and

, a second one of said separable sections comprises a second section with an end portion thereon; and

,

(b) said interlocking means includes first and second tongue and groove arrangements;

(i) said first tongue and groove arrangement having a tongue arrangement on said first section end portion-receiving area and a groove arrangement on said first section end portion; and

,

(ii) said second tongue and groove arrangement having a tongue arrangement on said second section end portion-receiving area and a groove arrangement on said second section end portion.

18. A splice closure according to claim 14 wherein:

(a) said longitudinal hinge defines a hinge line dividing said casing into first and second, generally semi-cylindrical, halves; and

,

(b) said hanger means defines an area of attachment of said casing to said support cable oriented on said casing first half and between about 125° and

145°

, radially, around said casing outer-wall portion, and on said casing first half, from said hinge line.

19. A splice closure according to claim 18 wherein:

(a) said hanger means comprises a rib/groove arrangement on said casing outer-wall oriented to define a longitudinal groove between a pair of longitudinal ribs;

said groove generally being aligned with, and extending along, said area of attachment;

said groove further being positioned closer to said seam than to said hinge.

20. A splice closure according to claim 19 wherein:

(a) said central portion comprises cut-line portion;

said casing being readily separable along said cut-line portion to form two separable sections each of which has an end portion thereon;

(i) each casing separable section having an end portion-receiving area therein substantially adjacent said cut-line portion and sized for receipt of an end portion of an intact closure therein, after said cylindrical casing has been separated along said cut-line portion;

(b) whereby an intact first splice closure can be selectively extended by a casing section through attachment to the intact casing of a casing section generated by separating a second splice closure along said cut-line portion.

21. The splice closure according to claim 20 wherein:

(a) said casing includes interlocking means constructed and arranged for providing interlocking connection between a casing of an intact closure and a casing section of a separated closure.

22. A splice closure according to claim 21 wherein:

(a) a first one of said separable sections comprises a first section with an end portion thereon; and

, a second one of said separable sections comprises a second section with an end portion thereon; and

,

(b) said interlocking means includes first and second tongue and groove arrangements;

(i) said first tongue and groove arrangement having a tongue arrangement on said first section end portion-receiving area and a groove arrangement on said first section end portion;

(ii) said second tongue and groove arrangement having a tongue arrangement on said second section end portion-receiving area and a groove arrangement on said second section end portion.