The invention relates to sealing connectors in gas fastening devices, mounted between the gas cartridge and the solenoid valve for filling the combustion Chambers of these devices in order to ensure sealing of the duct extending through the outlet and filling fittings of the cartridge and the solenoid valve. The term “solenoid valve” is used here for the sake of simplicity, although it could also be a simple mechanical valve and, more generally, any other member for transmitting the gas from the cartridge towards the combustion chamber.
Possible fastening devices are, e.g. nail drivers for applications with wood.
The connectors in question, e.g. such as those described in French patent applications FR 0405605 and FR 0407208 not yet published at the time of filing this application, include a double internal sealing sleeve for receiving the two fittings made of a flexible material, with a generally central transverse annular partition for dimensional adjustment, and an external slide in which the double sleeve is mounted.
The slide ensures that the shape or morphology of the flexible double sleeve is maintained and allows the connector to slide in the adapter of the cartridge, by virtue of which, when the cartridge is removed from the device, the sleeve made of flexible material does not remain “stuck” against the adapter and does not hold the fitting of the cartridge in the gas exhaust position.
On the one hand, the fitting of the cartridge may pierce the central partition for dimensional adjustment made of flexible material and, on the other hand, this central partition may he deformed to such an extent that it will obstruct the duct for the passage of gas.
There is a need for a sealing connector made of one single material sufficiently flexible to ensure sealing between the two fittings, but sufficiently rigid to prevent the central partition from being damaged or deformed and blocking one of the fittings for the passage of gas.