Electricity: conductors and insulators – Conduits – cables or conductors – Combined
Patent
1992-12-10
1994-04-12
Nimmo, Morris H.
Electricity: conductors and insulators
Conduits, cables or conductors
Combined
174 76, 174 77R, 174 93, H02G 1508
Patent
active
053027795
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a plug which makes it possible to fix in an impermeable manner an electric or telephone cable to a circular opening for passage of said cable.
There has already been described, in the French patent 2 466 887 of the applicant for example, a connector which is intended to surround an electric or telephone cable and makes it possible to produce an impermeable connection between this cable and the end of a tube for passage of said cable.
This connector is intended to be filled with a sealing material such as polyurethane foam. Experience has shown that the impermeability thus obtained was not always sufficient.
Moreover, such connectors do not provide sufficient axial fixing of the cable to the end of the tube.
Furthermore, the fixing of the cable to the end of the tube, by means of such connectors, is difficult to remove, so that it is not easy to replace a cable by a new cable or one having a different diameter.
The aim of the present invention is to eliminate the disadvantages of the abovementioned embodiment, by creating a plug which makes it possible to fix in an impermeable manner an electric or telephone cable to a circular opening for passage of said cable, this plug providing perfect impermeability with regard to the opening and to the cable, perfect axial fixing of the cable to the opening and this plug being capable of being removed easily from the latter in order to replace the cable.
According to the invention, the plug which makes it possible to fix in an impermeable manner an electric or telephone cable to a circular opening for passage of said cable is characterised in that it comprises a hollow body which is constituted by two shells intended to be fixed around the cable and comprising at least two jaws which are retained radially in said body and each comprise a central opening for passage of the cable and are supported radially on this cable at the time of fixing by clamping of the two shells to one another, the two jaws defining between them a chamber intended to be filled with a sealing material, and in that said hollow body comprises means for fixing it in a removable and impermeable manner to said circular opening for passage of the cable.
The two jaws provide excellent axial fixing of the cable in relation to the plug, given that the openings of these jaws are clamped on the cable at the time of the assembly of the two shells of the hollow body.
Furthermore, the sealing material filling the chamber comprised between the two jaws and surrounding the cable provides excellent impermeability between this cable and the plug.
Moreover, given that the plug is fixed in a removable manner to the opening for passage of the cable, it can be removed easily from this opening in order to replace the cable.
According to an advantageous alternative of the invention, the plug intended to be fixed to the end of a tube for passage of the cable also comprises a sleeve which is intended to be introduced into said end of the tube and the external diameter of which corresponds to the internal diameter of said tube, this sleeve comprising all around one of its ends means for fixing it in a removable manner to one end of the hollow body.
According to a preferred alternative of the invention, the sleeve comprises at its end a flange and the hollow body comprises at its adjoining end an annular groove which is shaped to engage on said flange of the sleeve.
Preferably, the sleeve comprises on its inside a cap which closes it completely, this cap being connected to the internal face of the sleeve by a narrowed and breakable annular zone which makes it possible to tear out this cap in order to pass the cable.
Thus, when the tube contains no cable, the cap of the sleeve closes in an impermeable manner the end of the tube, so that moisture cannot penetrate into the latter. In order to pass the cable into the tube, it is only necessary to remove the cap, to fix the plug around the cable, to inject a sealing material into the plug and then to fix the latter to the end of the tube.
Accord
REFERENCES:
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patent: 3935373 (1976-01-01), Smith et al.
patent: 4262167 (1981-04-01), Bossard et al.
patent: 4666240 (1987-05-01), Caron et al.
patent: 4704499 (1987-11-01), Faust
patent: 4752653 (1988-06-01), Bachel et al.
patent: 4861946 (1989-08-01), Pichler et al.
patent: 4933512 (1990-06-01), Nimiya et al.
Morel Didier
Morel Jacques
Etablissements Morel - Ateliers Electromechaniques de Favieres
Nimmo Morris H.
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