Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Reexamination Certificate
1999-09-27
2001-07-17
Reichard, Dean A. (Department: 2831)
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
C174S068300, C174S151000, C174S1520GM
Reexamination Certificate
active
06262370
ABSTRACT:
FIELD OF INVENTION
The present invention relates to a cable transit, and more particularly to a transit that will provide protection against the ingress of liquids, particles and gases, and which also protects against electromagnetic disturbances or interference at a transit location in a wall. The cable transit includes a sleeve and an associated nut means, said sleeve being intended to be fitted tightly in the wall, and a cable seal which comprises two semi-cylindrical bodies made of compressible material and together fitting into the sleeve-accommodating space, wherein said cable seal includes an adaptable centre hole for accommodating the cable to be passed through said wall. The semi-cylindrical bodies are comprised of several mutually detachable or peelable layers and can be pressed into tight abutment with the outer surface against the sleeve and the inner surface against the cable, with the aid of said nut means.
BACKGROUND OF THE INVENTION
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. Known screw fittings of this kind are generally difficult to work with, have only a small clamping area, and cannot readily be adapted to suit different cable sizes.
SUMMARY OF THE INVENTION
In accordance with the present invention, at least one of said peelable layers is removed along a part of the two semi-cylindrical bodies of a cable transit of the afore described kind, such that the semi-cylindrical bodies will have at this location a centre hole whose diameter is larger than the diameter of the remaining part of the semi-cylindrical bodies. The remaining part of each semi-cylindrical body is covered with a respective conductive, part-screen which form said screen when the two semi-cylindrical bodies are brought together. The aforesaid location is thus intended for a cable on which the outer insulating sheath is still intact, while the remaining part is intended for a part of the cable from which the sheath has been removed.
The aforesaid screen will conveniently comprise an inner part comprised of conductive rubber and an outer part comprised of conductive tape.
REFERENCES:
patent: 3823334 (1974-07-01), Philofsky et al.
patent: 4090029 (1978-05-01), Lunderberg
patent: 4136259 (1979-01-01), Djeddah
patent: 4329540 (1982-05-01), Howarth
patent: 4484962 (1984-11-01), Dienes et al.
patent: 4904826 (1990-02-01), Dixon
patent: 5294752 (1994-03-01), Vallauri et al.
patent: 5621191 (1997-04-01), Norris et al.
patent: 5920035 (1999-07-01), Haney et al.
Jacobson & Holman PLLC
Nguyen Charlie
Reichard Dean A.
Roxtec AB
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