Contact protection housing for an electrical connection

Details Contact protection housing for an electrical connection Contact protection housing for an electrical connection

2000-02-15

2001-09-18

Donovan, Lincoln (Department: 2832)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Housing structure

C335S202000

Reexamination Certificate

active

06291787

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an arc suppression housing for an electric connection with the contacts located in at least one housing filled with a sealing compound.
BACKGROUND INFORMATION
It is known that sealing compounds can be used for sealing electric plug-and-socket connections, soldered connections or the like. Reactive single- or two-component adhesives and/or sealants that set at room temperature or at higher temperatures are used as sealing compounds. They are processed mostly at atmospheric pressure.
An arc suppression housing has a comb-like design with the contact zone located within the chamber designed as a trough, in particular. Contact tabs are connected here with stranded conductors, for example, in particular by soldering or welding. When the electric contact is established, liquid sealing compound is filled into the chamber from above, distributed by gravity and hardened. The disadvantage here is that, depending on the contour of the chamber possibly defined by certain parameters and on the contact zone design, undercuts and cavities may be created, into which the sealing compound does not penetrate completely as it sets, so that air inclusions that negatively affect the protective function of the compound are formed.
SUMMARY OF THE INVENTION
Being composed of at least two separate housing parts put together to form an enclosed shape, the arc suppression housing according to the present invention ensures that the arc suppression area is preferably completely enclosed with at least one of the housing parts having a sealing compound filling channel formed by material removal. It is preferably designed so that during filling the sealing compound goes into the desired area or areas inside the arc suppression housing, and/or the sealing compound can be filled in at a pressure that is higher than atmospheric pressure due to the enclosed arc suppression housing. This always guarantees that no undesired bubbles are formed.
The sealing compound filling channel formed in the arc suppression housing preferably opens at the outside of the housing into a spray tool sealing funnel, which serves for coupling a spray tool for delivering the sealing compound.
The spray tool and the sealing funnel form, during casting, a hermetic and secure connection, which ensures that the liquid sealing compound being filled into the arc suppression housing cannot leak out at the contact point between the spray tool and the sealing funnel. This simple contact between the spray tool and the arc suppression housing to be filled makes the latter particularly suitable for assembly-line production.
The spray tool sealing funnel is preferably designed so that it extends beyond one side of the arc suppression housing, and is in particular attached to it via a break-off point.
The advantage of this is that after casting and setting of the sealing compound, the sealing funnel can be removed in a simple manner. This may shorten the manufacturing time in mass production, for example.
Because the arc suppression housing is made of at least two housing parts put together, a leakproof fit is important, in particular when the sealing compound is delivered under pressure. For this purpose, one of the housing parts has a circumferential groove, into which a gasket is placed to ensure the tightness with respect to the mating contour when the two housing parts are put together. The gasket thus installed, however, does not only prevent the liquid, i.e., not yet set, sealing compound from leaking out, but it also has the property of being gas-permeable, which accelerates the exit of the air entrained by the sealing compound, so that the assurance of bubble-free casting is enhanced.


REFERENCES:
patent: 3555215 (1971-01-01), Dehn
patent: 5184102 (1993-02-01), Mueller
patent: 30 14 333 (1981-10-01), None
patent: 2 204 194 (1988-11-01), None

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