A tubular cable seal member of elastomeric material has at least one axial slit for allowing the seal member to be installed transversely over a cable. The seal member is installed in an annular seating cavity in a housing which encloses at least part of the cable, and is squeezed between opposing s
A tubular cable seal member of elastomeric material has at least one axial slit for allowing the seal member to be installed transversely over a cable. The seal member is installed in an annular seating cavity in a housing which encloses at least part of the cable, and is squeezed between opposing surfaces of the cavity and cable to provide a sealing pressure. At the same time, opposing surfaces of the axial slit are squeezed together with the same sealing pressure. The housing may be a clamshell-like, two part housing and may have an internal chamber extending between two cable seal members which provide a seal between opposite end ports and the cable at opposite ends of the chamber. Side runner face seals extend between the cable seal members along opposite sides of the chamber to seal the chamber when the housing parts are closed together.
대표청구항▼
The invention claimed is: 1. A cable seal assembly, comprising: an outer housing having a through bore of a first diameter; an annular seating cavity in the though bore having opposite axial end walls and an inner surface of a second diameter greater than the first diameter; a cable extending throu
The invention claimed is: 1. A cable seal assembly, comprising: an outer housing having a through bore of a first diameter; an annular seating cavity in the though bore having opposite axial end walls and an inner surface of a second diameter greater than the first diameter; a cable extending through the bore in the housing, the cable having an outer surface of diameter slightly less than the first diameter; and a tubular seal member of elastomeric material, the seal member having at least one axial slit thereby forming opposing radially extending surfaces of the seal member, the seal member seated in the cavity and squeezed between the outer surface of the cable and the opposing inner surface of the cavity, the seal member having an inner surface which directly engages and seals against the outer surface of the cable and an outer surface which directly engages and seals against the inner surface of the annular seating cavity of the housing, and opposite axial end faces; and the seal member having a radial cross sectional area in a non-squeezed condition greater than the radial cross sectional area defined between the outer surface of the cable and the inner surface of the cavity, whereby pressure is induced between the inner and outer surfaces of the seal, the opposing radially extending surfaces at the axial slit, and the opposing surfaces of the cable and cavity when the cable is extended through the seal member. 2. The assembly as claimed in claim 1, wherein the seal member has two axial slits dividing the seal member into two separate, partially tubular parts, each slit having opposing radially extending surfaces for face-to-face sealing engagement when the seal member is squeezed between the cable and inner surface of the cavity. 3. The assembly as claimed in claim 2, wherein one part of the seal member is larger than the other, smaller part. 4. The assembly as claimed in claim 3, wherein the smaller part of the seal member is of wedge-like cross-sectional shape. 5. The assembly as claimed in claim 1, wherein the seal member has opposite axial ends which are rounded. 6. The assembly as claimed in claim 1, wherein the seal member has a predetermined axial length and radial thickness, the axial length being greater than the radial thickness. 7. The assembly as claimed in claim 6, wherein the axial length of the seal member is less than the axial length of the annular cavity in which it is seated. 8. The assembly as claimed in claim 1, further comprising a back-up ring seated over the cable and in the groove between one axial end face of the seal member and the adjacent axial end wall of the seating cavity, the back-up ring being of harder material than the seal member. 9. The assembly as claimed in claim 1, wherein the seal member is of elastomeric, substantially incompressible material. 10. The assembly as claimed in claim 1, wherein the inner and outer surfaces of the seal member are generally cylindrical surfaces for conforming to the opposing outer surface of the cable and inner surface of the cavity, respectively. 11. A cable seal assembly for sealing a segment of a cable, comprising: a canister having first and second parts moveable between open and closed positions, the first and second parts in the closed position defining an internal chamber having opposite sides and first and second axial end walls and the canister having at least a first end port through the first axial end wall of the chamber communicating with the internal chamber, the end port being adapted for receiving a cable extending into the canister; the end port having an enlarged annular recess having an inner surface and opposite axial end walls; and a combined cable seal and face seal device of elastomeric material mounted between the canister parts and configured to provide a seal between the first and second parts and between the cable and end port; the seal device having at least a first tubular cable seal having an outer surface, an inner surface which seals directly against an outer surface of cable extending through the first end port into the canister, and opposite axial ends, the cable seal being seated in the annular recess in the first end port of the chamber with the outer surface in direct engagement with the inner surface of the annular recess in the first end port, whereby the cable seal is squeezed between the inner surface of the annular recess and the outer surface of the cable when the canister is in the closed position; and a side runner seal having a first portion running from a first location on the first cable seal along one side of the chamber to the second end of the chamber and a second portion running from a second location on the first cable seal along the opposite side of the chamber to the second end of the chamber. 12. The cable seal assembly of claim 11, wherein the canister has a second end port in the second axial end wall of the chamber adapted for receiving the cable passing through the canister, the second end port having an enlarged annular recess having an inner surface and axial end walls, the seal device has a second tubular cable seal seated in the second end port of the canister for sealing engagement over the cable extending through the second end port, the first portion of the side runner seal has a first end connected to a first location of the first cable seal and a second end connected to a first location on the second cable seal and runs between the cable seals along one side of the chamber, and the second portion of the side runner seal has a first end connected to a second location on the first cable seal and a second end connected to a second location on the second cable seal and running between the cable seals along the opposite side of the chamber. 13. The cable seal assembly of claim 12, wherein the first and second parts of the canister have opposing first and second faces, respectively, which are in substantial face-to-face engagement when the canister is in the closed position, the end ports and recesses being defined between the opposing first and second faces. 14. The cable seal assembly of claim 13, wherein the first face has first and second side runner grooves extending between the annular recesses on opposite sides of the chamber and the first and second side runner seal portions are seated in the first and second side runner grooves, respectively. 15. The cable seal assembly of claim 14, wherein each side runner seal portion is of elongated cross-sectional shape in a direction transverse to the side runner groove in which it is seated, and the side runner groove is of corresponding elongated cross-sectional shape to the respective side runner seal and has a transverse width greater than the transverse width of the side runner seal. 16. The cable seal assembly of claim 15, wherein each side runner seal portion has opposing faces for sealing engagement with the side runner groove and an opposing portion of the second face when the canister is in the closed position, the thickness of the side runner seal portion between the opposing faces when the canister is in the open position being greater than the depth of the side runner groove, whereby the side runner seal portions are squeezed into a sealing condition when the canister is in the closed position. 17. The cable seal assembly of claim 16, wherein the opposing faces of each side runner seal portion are substantially flat and the opposing portions of the second face are also substantially flat. 18. The assembly as claimed in claim 11, wherein the cable seal has at least one axial slit having opposing faces which are in face-to-face sealing engagement when the cable seal is squeezed between the cable and inner surface of the annular cavity in the end port. 19. The cable seal assembly of claim 18, wherein the slit is offset from the junction between the cable seal and the side runner seal. 20. The assembly as claimed in claim 18, wherein the cable seal has two axial slits dividing the seal member into two separate parts, each slit having opposing surfaces for face-to-face sealing engagement when the cable seal is squeezed between the cable and inner surface of the cavity. 21. The assembly as claimed in claim 20, wherein one part of the cable seal is larger than the other, smaller part. 22. The assembly as claimed in claim 21, wherein the smaller part of the cable seal is of wedge-like shape. 23. The cable seal assembly of claim 20, wherein the slits are offset from the junction between the cable seal and side runner seal. 24. The cable seal assembly of claim 20, further comprising a two part back-up ring of more rigid material than the cable seal seated in each annular recess between one axial end wall of the cable seal and adjacent axial end wall of the recess. 25. The assembly of claim 11, wherein the cable seal has opposite axial ends which are rounded. 26. The assembly of claim 11, wherein the cable seal has a predetermined axial length and radial thickness, the axial length being greater than the radial thickness. 27. The assembly of claim 26, wherein the axial length of the seal member is less than the axial length of the annular recess in which it is seated. 28. The assembly of claim 11, wherein the seal device is of elastomeric, substantially incompressible material. 29. The assembly of claim 11, wherein the inner and outer surfaces of the seal member are generally cylindrical surfaces for conforming to the opposing outer surface of the cable and inner surface of the cavity, respectively. 30. The cable assembly of claim 11, further compromising a gap between an axial end face of the cable seal and at least one axial end wall of the annular recess in which the cable seal is seated. 31. The cable seal assembly of claim 30, further comprising a back-up ring of more rigid material than the seal device mounted in the gap between one axial end face of the cable seal and an adjacent axial end wall of the annular recess closest to the chamber, the back-up ring being adapted to conform to the outer surface of a cable extending through the recess. 32. The cable seal assembly of claim 11, wherein the side runner seal is of circular cross-section. 33. The cable seal assembly of claim 11, wherein the side runner seal is of elongated cross-sectional shape in a direction transverse to the length of the side runner seal. 34. The cable seal assembly of claim 11, wherein one of said parts has at least one additional port spaced from said end port for communicating with said chamber, and an underwater mateable cable junction device is coupled with said additional port on the outside of said canister for connecting a second cable to said chamber. 35. The cable seal assembly of claim 34, wherein the cable junction device is an underwater mateable connector unit. 36. The cable seal assembly of claim 34, wherein the cable junction device is a cable penetrator. 37. The cable seal assembly of claim 34, wherein said one part has a plurality of additional ports and associated cable junction devices coupled with said additional ports, whereby said canister comprises a field-installable junction box. 38. The cable seal assembly of claim 34, further comprising a jumper extending between the cable junction device and the cable. 39. The cable seal assembly of claim 11, wherein said canister has fill and purge ports communicating with said canister and removable seal caps closing said fill and purge ports. 40. A cable seal, comprising: a tubular member of elastomeric material for engagement over a cable, the member having an inner sealing face, an outer sealing face, and opposite axial ends; the annular member having a length between the axial ends which is greater than a radial thickness between the inner and outer sealing faces; and at least one axial slit extending along the length of the annular member between the inner and outer sealing faces wherein the axial slit has opposite faces for face-to-face sealing engagement; whereby the seal can be installed transversely over the cable by separating the seal at the axial slit. 41. The seal of claim 40, wherein the annular member has two spaced axial slits separating the member into first and second parts, the first part being larger than the second part. 42. The seal of claim 40, wherein the annular member has rounded axial ends. 43. A seal device for simultaneous sealing of multiple interfaces, comprising: first and second spaced tubular seal members aligned along a central longitudinal axis, each seal member having inner and outer sealing faces and opposite axial ends; a first elongate side runner seal having a first end secured to a first location on the first tubular seal member and a second end secured to a first location on the second tubular seal member; and a second elongate side runner seal having a first end secured to a second location on the first tubular seal member and a second end secured to a second location on the second tubular seal member, the second location being spaced from the first location on each tubular seal member; whereby the tubular seal members comprise cable seal members which provide sealing of a cable extending along the central longitudinal axis and through the seal members and the side runner seals provide simultaneous sealing between opposing surfaces of an enclosure for a segment of the cable extending between said tubular seal members. 44. The device as claimed in claim 43, wherein each side runner seal is of round cross section. 45. The device as claimed in claim 43, wherein each side runner seal is of elongate cross section. 46. The device as claimed in claim 45, wherein each side runner seal has substantially flat first and second sealing faces and opposite inner and outer ends. 47. The device as claimed in claim 43, wherein the tubular seal members and side runner seal members are formed integrally. 48. The device as claimed in claim 43, wherein each tubular seal member has at least one axial slit extending between the opposite axial ends at a location offset from the first and second locations. 49. The device as claimed in claim 48, wherein each tubular seal member has two spaced axial slits each offset from the first and second locations and separating the seal member into a first part to which said side runner seals are connected and a second, smaller part. 50. A cable sealing method, comprising: engaging a tubular elastomeric seal member having at least one axial slit, thereby forming opposing radial faces of the axial slit, transversely over a cable, with an inner sealing surface of the seal member directly engaging the outer surface of the cable; enclosing the seal member in an outer housing having a cable through bore and an annular cavity in the through bore for receiving the seal member whereby an outer sealing surface of the seal member directly engages an inner surface of the cavity between opposite axial end walls of the cavity, the cross-sectional area between the opposing surfaces of the cable and the cavity being less than the cross-sectional area of the seal member in a relaxed condition; and squeezing the seal between the opposing surfaces of the cable and cavity to provide a sealing pressure between the inner surface of the cavity and the outer sealing surface of the seal member and between the outer surface of the cable and the inner sealing surface of the seal member, and a sealing pressure between opposing radial faces of the axial slit. 51. The method of claim 50, wherein the step of enclosing the seal member comprises positioning the seal member in the cavity such that there is a gap between at least a first axial end of the seal member and a first axial end wall of the cavity when the seal member is squeezed between the opposing surfaces of the cable and cavity. 52. The method of claim 51, further comprising the step of engaging a back-up ring of more rigid material than the seal member over the cable adjacent the first axial end of the seal member, the step of enclosing the seal member in the annular cavity further comprising enclosing the back-up ring in the gap between the first axial end of the seal member and first radial axial end of the cavity. 53. The method as claimed in claim 50, wherein the step of engaging the seal member over the cable comprises seating the cable against a first, partially cylindrical part of the seal member having radial end faces with a part-annular gap between the end faces extending around the exposed portion of the outer surface of the cable, and seating a separate, second partially cylindrical part of the seal member having radial end faces in the gap between the end faces of the first part, and the step of squeezing the seal member between the opposing faces of the cable and cavity also squeezes the end faces of the two seal parts together with substantially the same sealing pressure. 54. A cable sealing method, comprising: engaging first and second spaced, aligned tubular seal members of elastomeric material over a cable; engaging the seal members in spaced first and second seating recesses in end portions of a first part of a canister, the seating recesses comprising semi-cylindrical grooves each having an inner semi-cylindrical face and opposite axial end walls; engaging a first elongate side runner seal extending between first locations on the outer surfaces of the seal members in a first side runner groove extending between the seating recesses and along a first side rim of the first part which is located on one side of a first chamber-forming cavity in the first part; engaging a second elongate side runner seal extending between second locations on the outer surfaces of the seal members in a second side runner groove in the first face extending between the seating recesses and along a second side rim of the first part which is located on the opposite side of the first chamber-forming cavity from the first side rim; closing a second part of the canister over the first part of the canister with a second chamber-forming cavity in the second part aligned with the first chamber-forming cavity to form a chamber receiving the cable segment extending between the tubular seal members, and with spaced semi-cylindrical seating recesses in end portions of the second part aligned with the seating recesses in the first part; squeezing the tubular seal members between opposing surfaces of the seating recesses and cable whereby an outer surface of each tubular seal member is in face-to-face sealing engagement with the opposing semi-cylindrical surface of the respective seating recess and the inner surface of each tubular seal member is in face-to-face sealing engagement with the opposing outer surface of the cable; and simultaneously squeezing the side runner seals between opposing portions of the second canister part and side runner grooves in the first canister part to seal the interface between the first and second canister parts. 55. The method as claimed in claim 54, wherein the step of engaging the tubular seal members over a cable comprises engaging the seal members transversely over the cable via an axial slit in each seal member. 56. The method as claimed in claim 54, wherein the step of engaging the tubular seal members over the cable comprises seating a first part of each seal member in a respective seating recess, the first part being of partial annular cross-section and having spaced end faces with a gap between the end faces, seating the cable against inner surfaces of the seated first parts of the seal members, and seating a separate, second part of each seal member over the exposed surface of the cable in the gap between the end faces of the first part of the respective seal member. 57. The method as claimed in claim 54, wherein the step of seating the second part of each seal member comprises retaining each second seal part in a respective seating recess of the second canister part and closing the second canister part over the first canister part such that the second seal parts register with the gaps in the respective first seal parts. 58. The method as claimed in claim 54, further comprising engaging a first back-up ring over the cable adjacent a first end of the first tubular seal member facing the second tubular seal member, and engaging a second back-up ring over the cable adjacent a first end of the second tubular seal member facing the first tubular seal member, and the step of engaging the seal members in the seating recesses comprises engaging the first tubular seal member and back-up ring in the first seating recess and engaging the second tubular seal member and back-up ring in the second seating recesses. 59. The method as claimed in claim 54, further comprising the step of securing the end of a second cable to a cable access port in one canister part which is oriented in a direction generally transverse to the first cable and connecting media in the second cable to corresponding media in the first cable segment inside the chamber via a jumper between the first cable and cable access port. 60. The method as claimed in claim 59, wherein the second cable is secured to the cable access port via an underwater junction device.
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