Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1998-04-06
1999-12-21
Soherbel, David A.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
2541343R, H02G 108
Patent
active
06003842&
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an installation for putting in an electrical cable for indoor installations.
DISCUSSION OF THE BACKGROUND
Such an installation is known from FR-A-2,537,795, but it has the drawback that its construction and its mounting is complicated, and the pulling element is not guided. Moreover, the installation must be mounted on the floor and on the ceiling, which is a drawback in the case of freshly painted rooms.
SUMMARY OF THE INVENTION
It is therefore the object of the present invention to avoid the drawbacks of the state of the art, and to design an installation of the initially mentioned type in such a way that it is easy to install, the pulling element is guided, and it can also be operated by just one person.
One advantage of the invention is that the first device of the installation according to the invention can be placed on the floor in the room in where electrical cable is to be put in the walls, and the second device can be installed at the wall opening with a few flicks of the wrist.
BRIEF DESCRIPTION OF THE DRAWINGS
Example embodiments of the invention, as well as their application, will be described more closely in the following, with reference to the attached drawing. Shown are:
FIG. 1, a perspective overall view of the installation for putting in electrical cable for indoor installations;
FIG. 2, is a side view of the device for pulling and pushing a string;
FIG. 3 is a top view of the device according to FIG. 2;
FIG. 4 is a front view of the device according to FIG. 2;
FIG. 5 is a representation in perspective of the device according to FIG. 2;
FIG. 6 is a representation in perspective of the guiding and holding device for the string in the area of a wall opening;
FIG. 7 is a longitudinal section through a second example embodiment of the guiding and holding device for the string in the area of a wall opening;
FIG. 8 is a top view according to arrow A of the device of FIG. 7;
FIG. 9 is a front view according to arrow B of the device of FIG. 7.
DISCUSSION OF THE PREFERRED EMBODIMENTS
Shown in perspective in FIG. 1 is the installation 1 for putting in an electrical cable for indoor installations. It comprises a first device 2 for pulling and pushing a string 3 in a cable conduit laid in the walling as well as a second device 4, which is detachably mounted in an opening 5 in the walling, and which guides the string or respectively the electrical cable in this area, this device 4 being provided with a control unit 6. The device 2 can be inserted in wall openings of between 4 and 10 cm in size, and can be put in position as desired in this area and clamped down in the opening. The device 2 and the device 4 are connected to each other through a tube 7. The tube 7 can be coated with Teflon. In addition, the control unit 6 is connected to the device 2 by a cable 8. The control of the device 2 takes place either directly at this device 2, via the control unit 6 on device 4, or through a radio transmitting apparatus 9. At the wall opening 10, where, with the device 2, the string, pushing through the wall, reemerges through the cable conduit, the electrical cable (not shown in FIG. 1) can be fastened to the string, after which this string is wound through the device 2. During winding out, the string is pushed through the flexible connecting tube 7 and a pipe 53 in the device 4 for guiding the string in and through the cable conduit provided in the walling, and this is done for a distance of at least 20 m and with an impact force of at least 50 kilo-ponds. The pull force during withdrawal of the string with the electrical cable or withdrawal of the electrical cable also amounts to at least 50 kilo-ponds. Automatic emergency stops prevent malfunctions. The entire device can be used in a mobile way, and the first device 2 is carried in a suitcase. If the pulling through of the string or of the electrical cable, respectively, is supposed to be carried out by a single service person, this person will remain at the wall opening at which the electrical cable is to be connected,
REFERENCES:
patent: 1145626 (1915-07-01), Stover
patent: 4454999 (1984-06-01), Woodruff
patent: 4497470 (1985-02-01), Carter et al.
patent: 4695038 (1987-09-01), Giroux
patent: 4736978 (1988-04-01), Cielker
patent: 4793048 (1988-12-01), Kashiwaya et al.
patent: 4953827 (1990-09-01), Araki et al.
patent: 5464193 (1995-11-01), Wrate
patent: 5813658 (1998-09-01), Kaminski et al.
Soherbel David A.
Wilson Lee
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