Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Patent
1995-05-31
1998-09-29
Sough, Hyung S.
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
174151, H01B 1700, H05K 500
Patent
active
058147667
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a cable lead-through, in particular in panel form, for a housing wall, in particular for a wall or a ceiling, or for a base of a distribution cabinet, a distribution box, or a junction box, or of a meter cabinet.
In the case of such cable lead-throughs, it is necessary that the individual cables, of any desired cable cross section, can expediently be led there adequately permanently, in particular permanently flexibly, at any desired point of the cable lead-through surface provided, even in the case of oblique cable running, into such cabinets or boxes. In this case, it is to be ensured that no specific structural preconditions, devices or special tools are required there to prepare for and produce a cable lead-through.
German Patent 3,915,007 discloses a cable lead-through for a housing wall of a distribution box or cabinet or a meter cabinet, in the case of which there is provided a pliable panel, for example of rubber or a thermoplastic, in the solid material of which a multiplicity of clearances of circular cross section are arranged close to one another in a spatially clearly defined alignment, sorted according to cross-sectional size, which clearances have in that case three respectively different sizes for three different cable cross sections; at the same time, there rise above these clearances frustoconical formations, which are produced in one piece from the same pliable material of the panel, and on the tip of which there is formed a raised-out protuberance, or a predetermined breaking point.
This cable lead-through not only suffers from the considerable disadvantage that in that case the individual cable lead-throughs are definitively established by the circular clearances, their spatial position and diametric size on the panel, but also that the frustoconical film-like pliable formations are only limitedly stretchable, with the result that the installation of the cable run is considerably restricted in that case. In addition, due to this limitation of the individual clearances, with regard to the arrangement, number and diametric sizes of the clearances and/or of the associated frustoconical formations, experience shows that in that case a multiplicity of respectively different such cable lead-throughs are required, with the consequently necessary considerable expense on tools and uneconomical stockkeeping with such cable lead-throughs.
In the case of another known such cable lead-through, in that case the planar panel consists of a relatively porous plastic. A cable lead-through is cut into this panel, according to the respective positional and diametric requirements, using a knife or scissors. This type of cable lead-through suffers from the disadvantage that a reliably sealed cable lead-through cannot be achieved in that case. In addition, in that case it has been found in practice that the cable lead-throughs produced manually with great effort and precision often tear open, and thus are unsealed, on account of the only poorly flexible material. Oblique cable lead-ins cannot be produced in a reliably sealed way, or only to a restricted extent. A permanently reliable seal between the cable sheath and the cable lead-through can be achieved only to a considerably restricted extent. In addition, the manual production effort for the precision cutting-out of the individual cable lead-throughs required is inefficient and uneconomical.
The invention is based on the object of providing a cable lead-through of the type mentioned at the beginning which eliminates the disadvantages of the known types and with which an adequate, permanent and reliably sealed cable lead-through can be achieved simply, without special tools and economically at any desired point of the planar cable lead-through and for any cable cross section, even in the case of oblique running of a cable, or installation at a later time.
What is advantageous in the case of this novel cable lead-through in panel form, in particular of a planar design, is not only that in this case, due
REFERENCES:
patent: 3873757 (1975-03-01), Berke et al.
patent: 4149028 (1979-04-01), Gressitt et al.
R. W. Stillwagon, Multiflex Cable Exit Air Seal and Insulator, IBM Technical Disclosure Bulletin ( vol. 16 No. 7), p.2227, Dec. 1973.
Koch Peter
Striebel Franz
Wickermann Hans
Sough Hyung S.
Striebel & John GmbH & Co. KG
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