DE6812915U - TELESCOPIC COUPLING - Google Patents

Description

D-4000 DÜSSELDORF 1 PATENT LAWYERS

Malkasten.traße 2 DIPL.-ING. ALEX STENG ER

DIPL.-ING. Wolfram Watzke Our reference:; ^V 05-b Date: December 21, I968

Rosalia Ballester Castillo, E - Valencia - 7, Salas Quiroga 13 Telescopic coupling.

The invention relates to a telescopic coupling, in particular between square tubes, such as between tubes for making table legs or any other extendable device, which is made with square tubes.

In the drawing is a Ausführungsöeisplel of the invention Telescopic coupling shown.

FIG. 1 shows a partially sectioned view of a telescopic coupling according to the invention. Between a jacket pipe a and an inner tube b is a coaxially inserted Kt-st en c, the side surfaces of which have large openings d in Combination with openings in the vicinity of the ends e, at which pairs of balls f are provided, plural marriage the sliding movement between the mentioned telescopic tubes a and b allow.

Each surface of the box ο comprises conventionally formed projections g resting on the inner tube b, through which the box ζ remains centered in its working position, the surfaces of the telescopic tubes c a and b being provided with interrupted running grooves h for the balls f. At the same time, the path of the inserted box c is limited by conventional stops i and j, di ·? are angoorciret on the jacket tube a or on the inner tube b, whereby a stop j of the inner tube is elastic, u: .i to simplify the installation of the balls f. This

Telephone (0211) 36 05 14 'Telegram address: Dabspalent Postscheckkonto Cologne 2276 10

B e ζ ugs ζ j. Γ fei ¹ η 1 1 ε t e

a Mart e! Tube b Inner tube G crate d openings e end up f Bullets G Ledges H Running grooves i attacks 3 attacks k end up

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Sinbau takes place there. , 'ch that the lower end of the box c on the Ends k of the lower stop j is arranged, with such a sufficient distance between the box c and the inner tube b shows that the balls f are stored in the corresponding openings can be. When the cost c is pulled out later, the balls f remain in the jacket tube a and the inner tube b, the stop j then goes back to its starting position.

Figure 2 shows a cross section through the same telescopic coupling, from which it can be seen with greater clarity that each surface of the lying between the telescopic tubes a and b Box c has two pairs of balls f near its ends. Thus, each face of the box c comprises eight balls, namely four at the top and four at the bottom, which slide in corresponding grooves h in the inner tube b and in the jacket tube a.

Finally, FIG. 3 shows a detail of the telescopic coupling, from which the coupling of the balls f serving as sliding element between the running grooves h of the casing tube a and the inner tube b and the formation of openings in the walls of the box c can be seen in which the balls f remain centered.

The operation of the article according to the invention is as follows: If the casing tube a is shifted on the inner tube b or vice versa, the box c shifts at the same time, by the balls f running in the grooves h formed in the two tubes so that the upper pairs of balls are in the upper Move groove part while the lower pairs of balls move over the lower sections of said running grooves h. In the end positions of its path, the displacement of the box c by the stop i in the one and by the stop j limited in the other case. Accordingly, the box c acts as a compensation element for the displacement between the pipes a and b, without any play or oscillation between the latter.

0812915

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The essential features of the invention are briefly listed below:

The manufacture of a telescopic coupling on the basis of quadrangular Pipes with insertion of a box with running balls corresponds to a basic process by which the running Production costs are not increased and these elements can be brought onto the market at acceptable prices.

The use of this coupling in table legs to achieve vertical adjustability of the table top enables a practical smooth adjustment and eliminates the lack of stability of the table top, especially when it is loaded.

The mechanical properties of this coupling result in a high tensile strength, so that the coupling has the advantage of that specifically the aforementioned purpose is fulfilled over an unlimited period of time.

The formation of openings in the side surfaces of the box

serves the purpose of keeping the weight as low as possible,

so that the table cannot move itself during the height adjustment.

129-5

12th

Claims (1)

claim Telescopic coupling, especially between square tubes, characterized in that between the jacket tube (a) and the inner tube (b) there is a coaxially inserted Box (c) is located, the side surfaces of which have openings (d) in combination with openings near the ends (e), in which balls (f) are mounted, which allow the sliding movement between the telescopic tubes (a and b) n; that any surface of the box (c) comprises conventionally formed and on the inner tube (b) resting projections (g), through which the Box (c) is centered in its working position, the surfaces of the telescopic tubes (a and b) with interrupted running grooves (h) for the balls (f) are provided; and that at the same time "- ' the path of the inserted box (c) through conventional stops (i, j), which are arranged on the jacket tube (a) or on the inner tube (b), the stop (j) of the Inner tube (b) is elastic in order to simplify the installation of the balls (f).