Patent ID: 6432090
Filing Date: 2002-08-13
Classification: A61M

Abstract:
An injection device comprising a syringe body (1, 13), which delimits a chamber which is designed to be filled with a liquid and a unit (17) for closing off the chamber and distributing the liquid, comprising an end piece (17a) for closing off the said chamber, which is extended by a locking male conical connection (17c), provided with a duct (18, 19) for distribution of the liquid, the said unit for closing off and distributing being mobile axially between a position known as the closing-off position, in which the distribution duct (18, 19) is isolated from the chamber of the syringe body (1, 13), and a position known as the injection position, in which the said communication duct communicates with the said chamber, wherein, in the said injection device:the unit (17) for closing off and distributing comprises an intermediate section (20), which is disposed between the closing-off end piece (17a) and the male conical connection (17c), and is placed such as to extend in an extension (3b) of the syringe body (1, 13); the syringe body (1, 13) comprises a ring (3) which is provided with the extension (3b) and a front wall (10), in which there is provided an opening (11) for passage of the conical male connection (17c), the said ring: delimiting two inner, upper (8) and lower (7) compartments which are juxtaposed axially, each of which has a shape which is conjugated with the intermediate section (20) of the unit (17) for closing off and distributing, and can accommodate the said intermediate section, the said compartments being separated by axial stop means (9) which can permit axial displacement of the intermediate section (20) of one compartment (7, 8) towards the other compartment (8, 7); and comprising in the extension of the front wall (10) a sleeve (12) which is threaded internally, and is designed to accommodate the male conical connection (17c) and to act as a fixed nut for assembly of a locking female conical connection (30) which supports an injection needle (24).