Electrical connectors – Interrelated connectors relatively movable during use – Universal movement
Reexamination Certificate
1998-08-31
2001-02-06
Bradley, Paula (Department: 2833)
Electrical connectors
Interrelated connectors relatively movable during use
Universal movement
C439S017000
Reexamination Certificate
active
06183263
ABSTRACT:
BACKGROUND OF THE INVENTION
The present model of utility consists on an articulate electric connector that allows to avoid the damages, disconnections and short circuits originated at the entrance end from the cables to the mobile electric apparatuses.
FIELD OF THE INVENTION
As it is known, there are numerous mobile and portable electric apparatuses that work being connected to the net of electric feeding. Such it is the case of apparatuses like the irons, portable drillers, electric welders, vacuum cleaners, etc.
For they have cables, the sufficiently long ones as so that the operator can use them appropriately, for without the long cables the connection to the socket would become uncoupled.
Nevertheless that the feeding cable has an appropriate longitude, it doesn't solve another serious inconvenience that is presented in this type of apparatus and such that at the end of the feeding cable that enters to the apparatus is subjected to permanent bending and tugs. For that reason that is one of the areas where first the cable deteriorates first. This deterioration is translated in such flaws as the cut of one or of both conductors inside the sheath of the cable, as a consequence of that which the apparatus stops to work or it makes it intermittently.
Other flaws that they take place that they have the same origin and that they are more dangerous than the previous one, they are the peelings in the sheath through which the conductors appear, with the rising danger of electrocution of the operator, or the flaws of internal insulation of the cable that give origin to a short circuit when both conductors are played.
To avoid these problems, traditionally it is appealed to such tubula protection head as sheaths that, subject to the frame of the apparatus in the area of entrance of the cable for the one that are threaded, absorb the twists and tugs pulls partially. However, the useful life of these sheaths is almost always smaller than that of the original apparatus, reason for which you arrives to a moment in that the cable is exposed to the mentioned risks.
A form of improving the functionality of these sheaths is that known sheaths conforming to a reinforced base and provided with a couple of articulations that gives it a mobility predetermined to the cable. This solution is more effective than that of the simple traditional sheath, although it presents its own limitations.
In the first place, if it is structured in a more rigid material, the articulate supports the tugs pulls well, but the intermediate tract cracks quicker. On the contrary, if a softer is used for, the sheath it will deteriorate in the articulations and when it finishes it is left anchored in the frame of the apparatus. In second place, this type of sheaths is articulate so that they move alternatingly, but always inside oneself plane for what the traverse tugs to the articulation plane end up breaking them.
All these problems are satisfactorily resolved by means of the present down articulate electric connector, because it has a universal joint composed of a spherical body and an articulation cavity conformed by an assembly support. On this spherical body and on the support they mount, respectively, a couple of contacts mobile sliding and a couple of contacts fixed sliding that allow the interconnection between the conductors of the cable and the terminals of connection of the apparatus.
The movements of the cable of the apparatus are accompanied by the operation of the universal joint. At the same time, these movements are limited by the stop of articulation composed by an entrance nozzle and the borders of the inlet mouth, so that the linking between the fixed contacts and the motives is permanent.
The final result is that the cable moves multidirectional accompanied according to two planes the movements of the operator, avoiding the mess and the strangulations of the cable, and without there are feeding interruptions to the terminals of the apparatus.
REFERENCES:
patent: 3328741 (1967-06-01), Brown
patent: 4978306 (1990-12-01), Robb
patent: 5915974 (1999-06-01), Carter
Benzaquen Carlos Miguel
Malanca Guillermo Enrique
Tacchi Alberto Miguel
Bradley Paula
Gilman Alexander
Pendorf & Cutliff
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