Supports – Pipe or cable
Utility Patent
1998-12-10
2001-01-02
King, Anita M. (Department: 3632)
Supports
Pipe or cable
C248S056000
Utility Patent
active
06168121
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a device for anchoring a conduit such as a cable or pipe into a body. To be more precise it concerns a device of the above kind including a plug which screws onto said body an anchor bush retained in the plug after multiple screwing and unscrewing of the body and the plug.
2. Description of the Prior Art
Devices for anchoring a cable or a pipe passing through a wall are already known in themselves. French patent No. 2 480 026 and the corresponding certificate of addition No. 2 526 597 describe one such device. In a device of this kind the anchor bush is not retained in the plug when the plug and the body are not screwed together. This causes problems, in particular when fitting the conduit into the device: it is difficult to position and to pass the conduit through before screwing. Also, the fitter may forget to fit the anchor bush, because it is not captive; this leads to the loss of the functions associated with the anchor bush.
The invention aims to solve the above problems:
by retaining the anchor bush in the plug before and after multiple mounting and demounting of the body and the plug;
by facilitating the positioning and the passing through of the conduit before mounting;
by facilitating the mounting and demounting of the body and of the assembly comprising the plug and the anchor bush; as the conduit is not rotated during this maneuver, it is not subjected to any torsion.
SUMMARY OF THE INVENTION
With the above aims in view, the invention proposes a device for anchoring a conduit, in particular an electrical cable, into a body, in particular a connector body, including a plug mounting on said body and an anchor bush disposed in said plug and which can assume an unclamped configuration or a clamped configuration depending on the position of said plug in said body, wherein said anchor bush and said plug are provided with complementary means for retaining said anchor bush in said plug.
Accordingly the device of the invention retains the anchor bush in the plug before and after multiple mounting and demounting of the body and the plug.
The device also has the advantages of a prior art device; in particular, it enables different diameter conduits to be attached using the same anchor bush and guarantees a seal when it incorporates a packing.
In one preferred embodiment of the device the anchor bush is not only retained in the plug but is also immobilized therein by virtue of complementary shapes before mounting and after demounting of the body and the plug.
The device is preferably such that the anchor bush is in its unclamped configuration before screwing together and after unscrewing the plug and the body.
The above embodiments are preferred because, in particular, they facilitate positioning and passing through of the conduit.
A very simple embodiment of the complementary means for retaining the anchor bush in the plug consists in providing the anchor bush with at least one radially projecting lug and the plug with at least one radially recessed imprint adapted to receive said at least one lug.
The device can include an anchor bush including at least one radially projecting lug and a plug including a plurality of radially recessed imprints adapted to receive said at least one lug.
In one embodiment of the device the anchor bush includes a plurality of radially projecting lugs and the plug includes a plurality of radially recessed imprints, the number of which is equal to the number of lugs, each of the imprints being adapted to receive one of said lugs.
The presence of a plurality of imprints on the plug facilitates mounting the anchor bush in the plug: this makes it easier to find an imprint without having to turn the anchor bush very far.
Each lug is advantageously in the form of a spherical dome: this allows progressive mounting and demounting of the anchor bush in the plug.
At least one imprint is advantageously in the form of a groove with two longitudinal flanks limited axially by a rim.
From a situation in which each lug is accommodated in an imprint, mounting the plug on the body preferably grips the anchor bush which causes each lug to escape from the imprint in which it was accommodated. This facilitates mounting, in particular by allowing the anchor bush to rotate freely when it grips the conduit. Undesirable torsion stresses on the conduit are avoided.
In one preferred embodiment of the device the anchor bush has a set of cuneiform fingers alternating with a set of blades for driving the fingers, at least one of the fingers carrying a lug; each finger can carry a lug.
The body and the plug form a tubular passage when the body and the plug are mounted one on the other and in one advantageous embodiment of the device, from a situation in which each lug is housed in an imprint, the clamping of the plug onto the body curves the tubular passage inwardly due to the action of the drive blades of at least each finger that has a lug; this can be achieved in particular through the action of the drive blades.
In one more particular and preferred embodiment the anchor bush has five radially projecting lugs and the plug has five imprints each adapted to receive one lug.
The features and advantages of the invention will emerge further from the following description given by way of example with reference to the appended diagrammatic drawings.
REFERENCES:
patent: 4387267 (1983-06-01), Becker
patent: 5276280 (1994-01-01), Ball
patent: 5410104 (1995-04-01), Gretz et al.
patent: 5773759 (1998-06-01), Hablutzel
patent: 5811728 (1998-09-01), Maeda
patent: 3240701 (1984-05-01), None
patent: 2480026 (1981-10-01), None
patent: 2501928 (1982-09-01), None
patent: 2526597 (1983-11-01), None
DeLuca Jerome
King Anita M.
Legrand
Young & Thompson
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