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WO1996017423A1 - Joint - Google Patents

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Info

Publication number
WO1996017423A1
WO1996017423A1 PCT/GB1995/002788 GB9502788W WO9617423A1 WO 1996017423 A1 WO1996017423 A1 WO 1996017423A1 GB 9502788 W GB9502788 W GB 9502788W WO 9617423 A1 WO9617423 A1 WO 9617423A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
seal according
connection pin
compressible
join
Prior art date
Application number
PCT/GB1995/002788
Other languages
English (en)
Inventor
Luc Breyssem
Original Assignee
N.V. Raychem Sa
Raychem Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by N.V. Raychem Sa, Raychem Limited filed Critical N.V. Raychem Sa
Priority to EP95938499A priority Critical patent/EP0795221A1/fr
Priority to JP8518431A priority patent/JPH10510137A/ja
Priority to BR9509931A priority patent/BR9509931A/pt
Priority to AU39869/95A priority patent/AU3986995A/en
Publication of WO1996017423A1 publication Critical patent/WO1996017423A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/013—Sealing means for cable inlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3272—Mounting of sealing rings the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end

Definitions

  • the present invention relates to a seal, and in particular to a ring seal
  • the seal may generally be used to seal between any two surfaces, but it has particular utility in electrical or telecommunications cable splice closures
  • United States Patent No 4558174 discloses a closure for a cable splice which has two mating covers and two end plate assemblies A peripheral channel in each end plate is filled with a circumferential gasket which seals between the periphery of each end plate and the surrounding covers The ends of each circumferential gasket are connected together This is accomplished by forming each circumferential gasket with a pair of longitudinally extending passageways At the junction of the ends of the gasket, pins are positioned in the passageways such that they extend from one end The other end is brought into juxtaposition with the one end and the extending pins are caused to be positioned in the passageways of the other end
  • Ring seals for cable splice closures which comprise a single elastome ⁇ c tube, the ends of which are joined together by means of a solid connection pin, are also known
  • An object of the present invention is to provide an elongate compressible seal in which two ends can be joined together firmly, yet substantially without detriment to the compressibility of the seal at the join
  • Another object of the invention is to provide an improved seal which is compressible, preferably substantially uniformly compressible, along substantially its entire length Where the seal is, in use, a nng seal, the seal is consequently preferably compressible around substantially the entire nng
  • an elongate compressible seal in which, in use, two ends are joined together by means of at least one connection pin located in, and extending between, at least one opening in each end, wherein the or each connection pin is hollow and compressible and the seal is therefore compressible at the join between the two ends
  • the seal is hollow, i e hollow in addition to being hollow at each end by virtue of the or each opening
  • connection pin is hollow and compressible
  • the seal is compressible at the join between the two ends
  • the connection pin is hollow and compressible
  • the seal is substantially incompressible at the join, or at least is significantly less compressible at the join than around the remainder of the seal
  • the triple point is generally the location which needs the greatest degree of reliability from the seals if the environmental sealing of the splice closure is to be maintained
  • the seal of the invention can advantageously be used as
  • the seal according to the invention is resiliently compressible and/or the or each connection pin is resiliently compressible, and advantageously the seal is therefore resiliently compressible at the join between the two ends This normally has the advantage of making the seal particularly reliable, since when the seal is compressed between two surfaces, for example, its resilience normally causes it to press against the surfaces
  • the seal according to the invention may advantageously be substantially uniformly compressible, in use, along substantially its entire length Even more advantageously, the seal may, along substantially its entire length, be substantially uniformly resilient to compression, in use
  • this may advantageously be achieved by using one or more hollow compressible connection pins which have very little resilience upon being compressed, e g substantially negligible resilience compared to the resilience exhibited by the remainder of the seal
  • connection p ⁇ n(s) is preferably greater than the diameter of the openings in the ends of the seal in which the connection pin is, or the connection pins are, located This can have the advantage of enabling a tight grip to be formed between the connection p ⁇ n(s) and the ends of the seal
  • connection pin is, or pins are, preferably an interference fit in the openings in the ends of the seal Additionally or alternatively, however, the p ⁇ n(s) and/or openings may be profiled to interlock with each other
  • the seal is preferably a ring seal, e g an 0-r ⁇ ng seal, and preferably has a substantially annular shape in use
  • the seal may, for example, extend around an end block of a cable splice closure, to form a seal between the end block and the casing of the closure which surrounds the end block
  • the two ends in the seal which are joined together by means of the or each connection pin are preferably opposite ends of the same discrete elongate article
  • the seal is therefore preferably an elongate seal the two ends of which are joined together to form a closed loop Additionally or alternatively, however, the two ends in the seal which are joined together by means of at least one connection pin according to the invention may be the ends of different discrete elongate articles
  • the seal according to the invention may therefore comprise two
  • seal and the connection p ⁇ n(s) are hollow
  • the seal and the connection pin may advantageously be hollow by virtue of any suitable internal structure
  • the seal itself and the connection p ⁇ n(s) may, in some embodiments, have different types of internal structure, but preferably they have substantially the same type of internal structure
  • the seal and/or the connection p ⁇ n(s) may, for example, comprise polymeric foam, either closed-cell foam or open-cell foam In most preferred embodiments however, the seal and/or the connection p ⁇ n(s) are not formed from polymeric foam
  • connection pin may advantageously be tubular
  • connection p ⁇ n(s) may, in some embodiments, advantageously have a longitudinal slit In this way the or each pin can often have very little resilience to compression (the advantage of which was explained above) and/or the or each pin can grip the ends of the seal firmly
  • the longitudinal edges of the slit may, for example, overlap
  • the seal of the invention may advantageously have at least one cavity extending along substantially its entire length, and the openings in which, in use, the or each connection pin is located are preferably ends of the or each cavity
  • the seal may, for example, be tubular
  • the cross-sectional diameter of the or each cavity is substantially uniform along substantially the entire length of the seal
  • the seal may be formed from sealing material, and/or it may have sealing material as at least part of an external surface thereof
  • a preferred sealing material is gel
  • the gel may, for example, comprise sihcone gel, urea gel, urethane gel, thermoplastic gel, or any suitable gel or gelloid sealing matenal
  • Preferred gels compnse an oil - extended polymer composition
  • the gel has a hardness at room temperature as determined using a Stevens-Volland Texture Analyser of greater than 45g, particularly greater than 50g, especially greater than 55g, e g between 55g and 60g It preferably has a stress-relaxation of less than
  • the seal is preferably formed, at least in part, from elastome ⁇ c material
  • the seal may be formed from natural or synthetic rubber, or a rubber-like plastics material Neoprene is an example of a preferred material
  • the seal according to the invention has particular utility in an electrical or telecommunications cable splice closure
  • the seal compnses part of a cable splice closure
  • the seal may, for example, comprise a ring seal which, in use, extends around an end block of the cable splice closure, e g between the end block and an outer casing of the closure
  • the splice closure may, for example, have only one such end block, but preferably it has two such end blocks, one at each end of the casing
  • a cable splice closure which includes one or more seals according to the invention Any or all of the preferred features of the seal according to the first aspect of the invention may advantageously be present in the seal(s) included in the cable splice closure according to the second aspect of the invention
  • Figure 1 shows a join region of a seal according to the invention, and details of a preferred form of connection pin for forming the join, and
  • Figure 2 shows a join region of a similar seal according to the invention, and details of another preferred form of connection pin for forming the
  • Figure 1 shows a tubular seal 1 , in which two ends 3 are about to be joined together by means of a tubular connection pin 5
  • the connection pin 5 comprises an open-ended tube which has been inserted into one of the open ends 3 in the tubular seal 1
  • the tubular connection pin may be inserted into the other open end 3 of the seal
  • the outer diameter of the connection pin 5 is greater than the diameter of the openings in the ends 3 of the seal 1 , causing the seal 1 to grip the connection pin 5 firmly and thereby form a firm join
  • Figure 2 shows a tubular seal 1 similar to that shown in Figure 1 , with a modified form of hollow connection pin 7
  • This connection pin 7 although tubular (at least in use), has a longitudinal slit 9, the longitudinal edges of which overlap
  • This type of connection pin 7 can often be more compressible (i e it can often be compressed more easily than that shown in Figure 1) and/or it can often have an increased grip on the ends of the seal 1
  • the outer diameter of the connection pin 7 is preferably greater than the diameter of the openings in the ends 3 in the seal 1

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cable Accessories (AREA)
  • Gasket Seals (AREA)

Abstract

Joint compressible allongé (1) dont les deux extrémités (3) sont reliées ensemble à l'aide d'au moins une tige de raccordement (5) placée à l'intérieur et s'étendant entre au moins une ouverture pratiquée dans chaque extrémité (3). La où chaque tige est creuse et compressible, et le joint (1) est par conséquent compressible au niveau de la jonction entre les deux extrémités (3).
PCT/GB1995/002788 1994-11-30 1995-11-30 Joint WO1996017423A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP95938499A EP0795221A1 (fr) 1994-11-30 1995-11-30 Joint
JP8518431A JPH10510137A (ja) 1994-11-30 1995-11-30 シール
BR9509931A BR9509931A (pt) 1994-11-30 1995-11-30 Vedação
AU39869/95A AU3986995A (en) 1994-11-30 1995-11-30 Seal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9424137.9 1994-11-30
GB9424137A GB9424137D0 (en) 1994-11-30 1994-11-30 Seal

Publications (1)

Publication Number Publication Date
WO1996017423A1 true WO1996017423A1 (fr) 1996-06-06

Family

ID=10765185

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002788 WO1996017423A1 (fr) 1994-11-30 1995-11-30 Joint

Country Status (7)

Country Link
EP (1) EP0795221A1 (fr)
JP (1) JPH10510137A (fr)
AU (1) AU3986995A (fr)
BR (1) BR9509931A (fr)
CA (1) CA2206323A1 (fr)
GB (1) GB9424137D0 (fr)
WO (1) WO1996017423A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309096A (en) * 1964-02-26 1967-03-14 Inka Egons Split circular sealing element
DE3512165A1 (de) * 1984-04-06 1985-10-17 American Telephone And Telegraph Co., New York, N.Y. Kabelverschluss
US4883279A (en) * 1987-09-08 1989-11-28 Sabo Robert C Sealing system
EP0417608A2 (fr) * 1989-09-13 1991-03-20 Siemens Aktiengesellschaft Joint d'étanchéité rond et divisé pour corps d'étanchéité de garnitures de câbles
EP0443118A1 (fr) * 1990-02-23 1991-08-28 RXS Schrumpftechnik-Garnituren GmbH Anneau d'étanchéité divisé en matériau synthétique pour corps d'étanchéitÀ© de garnitures de câble

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309096A (en) * 1964-02-26 1967-03-14 Inka Egons Split circular sealing element
DE3512165A1 (de) * 1984-04-06 1985-10-17 American Telephone And Telegraph Co., New York, N.Y. Kabelverschluss
US4883279A (en) * 1987-09-08 1989-11-28 Sabo Robert C Sealing system
EP0417608A2 (fr) * 1989-09-13 1991-03-20 Siemens Aktiengesellschaft Joint d'étanchéité rond et divisé pour corps d'étanchéité de garnitures de câbles
EP0443118A1 (fr) * 1990-02-23 1991-08-28 RXS Schrumpftechnik-Garnituren GmbH Anneau d'étanchéité divisé en matériau synthétique pour corps d'étanchéitÀ© de garnitures de câble

Also Published As

Publication number Publication date
JPH10510137A (ja) 1998-09-29
EP0795221A1 (fr) 1997-09-17
MX9703943A (es) 1998-10-31
BR9509931A (pt) 1997-09-30
AU3986995A (en) 1996-06-19
GB9424137D0 (en) 1995-01-18
CA2206323A1 (fr) 1996-06-06

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