| 摘要 |
<p>1. System for coupling an appliance to a cartridge (2) of pressurized fluid which comprises a draw-off valve (4) and an annular bead (3a, 4a) surrounding the valve head (4b), the said system comprising : - a central core (1) integral with the said appliance and comprising means (10a, 11) for drawing off the fluid, intended for interacting sealingly with the valve head of the said cartridge, means (1a) for conveying the drawn-off fluid towards the appliance, and an annular bearing surface (1b) located in the lower part of the said core, the latter having an external thread (1c) ; - an annular part (9) comprising a central internal thread (9a) interacting with the thread (1c) of the central core, and a plurality of fastening grippers (9b), each having the form of an elastic jaw comprising, towards the outside, a heel (9c) for fastening on the inside and under the annular bead of the cartridge and, towards the inside, a projection (9b) with a sloping surface, forming an element for pushing the fastening heel towards the recessed wall of the annular bead when the annular bearing surface of the central core comes up against the said projection as a result of screwing ; - means for making the annular part inseparable from the central core, characterized in that the means of inseparability comprise : - a groove (1d) which is made in the central core and is located on the inside of the annular part when the said central core and the said annular part are joined together inseparably, and the bottom of which extends, in the axis of the said core, from the annular bearing surface over a distance at least equal to the travel necessary for pressing on and pushing the elastic jaws against the annular bead as a result of the screwing of the said core in relation to the annular part ; - at least one inseparability tooth (9e) which forms part of the annular part and projects towards the inside of the internal thread (9a), and the end of which is set back from those of the fastening grippers, and which, during the first screwing of the central core on the annular part, is capable of being pushed outwards by the annular bearing surface and then dropping permanently into the groove.</p> |
