Cable gland embodying moisture-proof seal
AssigneeWestward Investments Limited
InventorFranz Lackinger
Life of this patent
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Abstract
An electrical cable gland, generally of the type comprising two parts having a tubular configuration and interengaged by means of screw-threads is provided with an elastomeric tubular sealing sleeve, sealing onto a smooth outer surface of one part and engaging an end face of a second part so as to extend across and seal the entrance and outer surfaces of the screw-threads. The cable gland preferably has an internal armor clamp associated with electrically conductive metal inner parts and has its entire operative outer surface made of an electrically insulating and/or corrosion resistant material. The cable gland also preferably has an inner and an outer seal of the compression type.
Claims10
An electrical cable gland comprising at least two tubular parts, a first one of which has an externally screw-threaded zone co-operating with an internally screw-threaded zone of the other or second part, said first part having, in addition, at a location remote from the internally screw-threaded second part, a smooth outer sealing surface with which co-operates an end region of an elastomeric sealing sleeve, the opposite end region of which is supported or preformed so as to flare outwardly upon axial compression thereof, the wall thickness of the sealing sleeve being small relative to its length so as to promote flaring and not simply axial compression, the arrangement being such that, upon operative installation, the adjacent end face of the internally screw-threaded second part contacts and seals against said opposite end region of the elastomeric sealing sleeve while urging the adjacent end region of the sleeve radially outwardly as the two parts are moved together by means of the screw-thread to effectively seal the screw-threads of the two parts from the exterior.
Dependencies are inferred from the claim text.