Single and dual cable seal system

Details Single and dual cable seal system Single and dual cable seal system

1999-01-19

2001-01-30

Kincaid, Kristine (Department: 2831)

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

C016S002200, C248S056000, C439S462000

Reexamination Certificate

active

06180882

ABSTRACT:

FIELD OF THE INVENTION
In general, the present invention relates to sealant systems, and, in particular, the present invention relates to a sealing system for a single or dual cable, which may be installed when the single or dual cable is attached at both ends thereby preventing interruption of transmission service carried by the cable.
BACKGROUND
For many years sealing the area around cables entering walls, and especially the walls of cable trays wherein fiberoptic cables are spliced, from environmental elements has been difficult for various industries. Currently, the industry uses a heat shrink tube that surrounds a hug, which allows entrance of one or more cables into the wall of a cable tray. The cable is installed in the tray, and secured thereto, then the tray is placed in the ground. A heat gun is subsequently used to shrink the tube around the hug. This causes a potentially dangerous situation do to the presence of gas or water that may be underground. Further, the cable must be fully installed when the heat shrink tube is applied preventing replacement of the tube, if it should break or crack, without interruption of cable transmission service because the cable must be removed from the interior of the tray and a new tube placed over the hug.
U.S. Pat. No. 4,379,204 to Perrault et al. discloses a strip
41
having a steel wire running therethrough, which is “sandwiched” between a flat washer
29
and an adapter
33
for sealing a cable. This patent does not teach nor show a split ring or two piece pressure nut design allowing the sealing system to be installed on the cable without interruption of cable service. The patent also does not teach nor show the sealing of two cables simultaneously of the installation of a sealing system about the two cables without interruption of cable service. Moreover, the sealant strip is relatively costly and a bushing is not shown substituted for the sealant strip, among other things.
SUMMARY OF THE INVENTION
The present invention eliminates the above difficulties and disadvantages by providing a sealing system for sealing environmental elements from passing between at least one cable and a wall. The system includes a hug secured to the wall, having threads. A first ring is disposed about the cable and has at least one slit disposed therein for sliding the cable therein to dispose the ring about the cable. A pressure nut compresses the cable therein and has threads for screwingly engaging the threads of the hug, a first half, and a second half releasably coupled to the first half for inserting the cable therein to dispose the first half and the second half about the cable. Further, a mechanism for sealing is disposed about the cable between the first ring and the pressure nut and the first ring, the mechanism for sealing, and the pressure nut are installed about the cable without interruption of cable transmission service.
A second ring is disposed about the at least one cable and having at least one slit disposed therein for sliding the at least one cable therein to dispose the second ring about the at least one cable. Moreover, the hug further includes an external abutment end and an internal abutment end spaced from the external abutment end.
A further advantage is that the first half of the pressure nut includes at least one first extension projecting therefrom, a first lip abutting the external abutment end, and at least one first receiving aperture. The second half of the pressure nut includes at least one second extension projecting therefrom and being inserted into the at least one first receiving aperture and a second lip abutting the external abutment end. The second half of the pressure nut includes at least one second receiving aperture in which the first extension is inserted. In addition, the first ring abuts the internal abutment end of the hug and the mechanism for sealing comprises a sealant tape.
Yet another advantage is that the mechanism for sealing can also comprise a bushing that includes a slit disposed therein for sliding the at least one cable therein to dispose the bushing about the at least one cable.


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