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US 5,290,073 AGranted
Expansion seal for cable pipe
OwnerChung F. Cheninventor
Life of this patent
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OwnerChung F. Cheninventor
Estimating the term…
An expansion seal for sealing pipe through which electrical cables are arranged to pass comprises an elastic ring, a plurality of upper clamping plates and a plurality of lower clamping plates each preferably of plastics or rubber material. The elastic ring is supported between a plurality of the upper and lower clamping plates, at the circumference of this elastic ring having a slit to allow insertion of cable therein and to cover the cable easily. The elastic ring and cable is locatable in a cable pipe and fixed at one end of the cable pipe by screw bolts. When the bolts are tightened addition a compressive force on the upper clamping plates the elastic ring extends inwardly to fill the space between the inner wall of the elastic ring and cable and outwardly to fill the space between the elastic sealing ring and inner surface of the cable pipe, to prevent liquid, mud and moisture from entering into the cable pipe. Conveniently, the expansion seal can be applied to pipes of different inner diameter and cable of different outer diameters.
An expansion seal for cable pipe sleeve comprising a plurality of upper and lower clamping plates having frusto conical surfaces thereon, an elastic ring, having a central axis, upper and lower surfaces and inner and outer circumferential surfaces, said ring located between the upper and lower clamping plates and having a slit formed therein at an angle relative the central axis of said ring, a plurality of symmetrical through holes located parallel to the said axis, said ring having bevelled faces on the upper surface and the lower surface thereof, the faces disposed at acute angles to the inner circumferential and the outer circumferential surfaces of said ring;
Dependencies are inferred from the claim text.