DE7503699U - FLEXIBLE HOSE, IN PARTICULAR FOR VACUUM CLEANERS - Google Patents

Description

Patent attorneys
Dipl.-Ing. W. Beyer Dipl.-Wirtsch.-Ing. B. Jochem

Prankfurt am Main Staufenstr.

In matters:

Aktiebolaget Electrolux
St ockholm / Sweden

Flexible hose, especially for
Vacuum cleaner »and process for its manufacture

The invention relates to a flexible hose with one or more helically embedded therein electrical conductors, as well as a method for producing such a hose.

It is known to put one or more electrical conductors in a hose, in particular a dust cleaner hose in order to electrically connect special motor-driven vacuum cleaner tools, for example. Through the electrical connection between the vacuum cleaner tool and the vacuum cleaner motor A special individual connection can be made via the vacuum cleaner hose of the vacuum cleaner tool are omitted, whereby

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handling is made easier. The vacuum cleaner hose in this case not only has the function of transporting dust-laden air from the tool, but also to supply its drive motor with electrical energy

In a known hose, electrical conductors are wrapped around a layer of elastic material, which surrounds an inner tube reinforced by a metal wire. When swaddling will be the ladder stretched so that they sink into the elastic material. However, it has been shown that such hoses become too stiff and therefore difficult to handle this arrangement is not possible, if desired, a conventional one in a simpler manner To provide the hose with electrical conductors.

The invention is based on the object of creating a flexible hose that is very simple is constructed and can therefore be easily manufactured, but on the other hand by easy Weight and good handling distinguishes itself.

The above object is achieved according to the invention by a hose in which the electrical Ladder with play to a certain extent longitudinally movable in one or more outside Covered grooves lie.

The invention is described below with reference to in

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Exemplary embodiments illustrated in the drawing are explained in more detail.

Fig. 1 is a perspective view of a dust

suction hose with embedded electrical conductors according to the invention,

Fig. 2

and 3 Pig · 1 corresponding views of further exemplary embodiments,

Pig. 4 shows a section through part of the Pig hose. 2.

The hose, designated as a whole by 10, is in

j Longitudinal and transverse direction flexible and forms one

i self-supporting unit. Allow ribs and grooves 11

I axial changes in length of the hose surface. When

I material is preferably a relatively stiffer one

I use plastic or rubber. A helical

I, shaped groove 12 in the fluted outer surface of the

i) flexible tubing takes one or more

I electrical conductor 13 on. The slope angle of the

i | The thread of the groove 12, measured with reference to the

I Longitudinal axis of the hose, should be greater than

10 °.

The hose 10 is provided with a sheath or sheath 14, preferably made of a braided material,

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see the electrical conductor 13 with a certain game in the groove 12 holds. The depth and width of the groove are relative to the thickness of the electrical conductor dimensioned so that the latter move to a certain extent in the longitudinal direction can, so that the flexibility of the hose is maintained. This is not the case with the above mentioned known hose, in which the electrical conductor firmly in a partially flexible Cash register is wound, whereby movements of the conductor in the longitudinal direction are made impossible and the Tube receives an undesirable stiffness.

As an alternative, a conventional hose can be easily combined with electrical Ladders are provided by slipping over a hose 10 according to the invention.

In the embodiment according to FIG. 2, the vacuum cleaner hose is made up of an inner tube 15 »of which is a smooth one Has inner wall and is reinforced by a helical metal spring 16. A flexible band 17 is helically wound around the inner lobe » As shown in Fig. 4, the band 17 has notches or grooves at certain intervals 18, which after winding the tape are helically behind one another, so that a total of one There is a helical groove into which electrical conductors 13 can be inserted or drawn in. According to Fig. 2 are the incisions

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on the outside of the bands, but they can too 5 lie on the inside thereof. In both cases the slope is helical Groove considerably larger than the slope of the helically wound band 17.

As with the first example The incisions in the tape have a cross-section such that the electrical conductor is in a certain Extent can move lengthways. Furthermore, a casing 14 is again provided, which surrounds the band 17 and holds and protects the electrical conductor in the groove.

The hose according to the invention is made in a simple manner made by making one or more helical threads Grooves 12 are attached, after which one or more electrical conductors 15 are inserted into the groove will. Alternatively, a plurality of essentially U-shaped incisions can be made with a certain spacing between them in a flexible band, which is then screwed around a flexible hose is wound with a substantially smooth inner wall. Having electrical conductors in the grooves or incisions have been inserted, the hose is covered with a sheath, preferably made of braided material which holds the electrical conductors in their position in the groove and also protects them.

Notwithstanding the exemplary embodiments described above, a groove 12 could also be in the manner in a be attached middle layer of tubing that it receives the electrical conductor completely covered, so

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I I I til

ltt «ti» * · ι

• t f «* f << 1 t · I ·

that the need for an outer jacket is eliminated.

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Claims (8)

it · ti I «··« ltt ## ·· ♦ · <ttjftasprüche 1. Flexible hose with one or more helical threads electrical conductors embedded in it, d a du r c h marked n; e t, that this with play to a certain extent in the longitudinal direction movable in one or more grooves (12, 18) covered on the outside. 2. Hose according to claim 1, characterized in that it is a self-supporting, grooved Forms unit, which allow an elongation of the surface. 3. Hose according to claim 2, marked by this. e t that it is made of a relatively stiff material such as plastic. 4. Hose according to one of claims 1 to 3, marked by this. net that it consists of several layers, of which the innermost one through an embedded spiral Metal spring (16) reinforced, internally smooth, flexible hose (15) made of a material, such as plastic. 7503699 10/20/77 It til «· ' > 111) 111 It t III I * III I · (III III «? > I ·> I III III I I It I Mill * I III 5. Hose according to one of claims 1 to 4, characterized in that the pitch angle of the screw thread a, in which the electrical conductors (13) are laid is greater than 10 °. 6. Hose according to one of claims 1 to 5 »characterized in that that a braided casing (14 ·) covers the grooves (12). 7. Hose according to one of claims 1 to 6 »characterized by that the grooves in one, helically an inner tube (15) wound, flexible strips (17) are formed, wherein the slope of the strip is smaller than the slope of the electrical conductor (13). 8. Hose according to claim 7, characterized in that the grooves (12, 18) on the inside of the Strip (17) are arranged 9 «hose according to claim" 7 * characterized in that the grooves are on the outside of the strip (17) are arranged according to one of claims 1 thereby g ek_A- «r * n ^ z e i c h e t, that first ^ pur ^ hose with a groove (12) t, in which one or more rt Sautzanspr./ölt.BI.2. ⁱ / (| eslrichen 7503699 10/20/77