the invention device is incorporated in a machine particularly suited to the preparation of coffee beverages obtained from the infusion of a substance of the type ground coffee . for this purpose , the device is mounted on chassis 3 of the machine by any usual means so as to receive hot water under pressure obtained conventionally from a boiler and a pump . this extraction device comprises an infusion chamber which is defined here as being of sufficient volume to receive the ground coffee , packaged or not , and at the level of which hot water injection takes place through the ground coffee . to allow the introduction , infusing and ejection of the ground coffee , the infusion chamber is formed by a fixed part 1 and a moving part 2 . the moving part 2 executes the successive operating phases . it will be noted that the figures appended to the present description refer to an embodiment using packages 6 of ground coffee . in the description which follows , reference will only be made to this example , although non - restrictive , given that the device can also operate with non - packaged ground coffee in an easy - to - handle filter cup . moreover , the example shown consists of two infusion chambers ready to operate simultaneously or separately with two packages 6 . however , this example is not restrictive and the invention device may apply to a system using only one package 6 . in the example shown on fig1 to 3 , moving part 2 is operated through a lever 20 equipped with a handle 13 by the operator , together with a stirrup type system enclosing moving part 2 . lever 20 is itself being mounted to rotate around axle a relative to frame 3 of the machine . the system operating moving part 2 can be more clearly seen on fig4 to 6 . these figures show rotational axle b of moving part 2 relative to frame 3 and fixed part 1 . in parallel , a sliding pivot linkage is formed between lever 20 and moving part 2 so as to generate drive . by linkage of the sliding pivot is meant a kinematic linkage allowing rotation of the moving part around an axle , itself capable of translation relative to lever 20 . in the example shown , the sliding pivot linkage takes the form of a pair of oblong holes 21 formed on two lateral sections of lever 20 so as to co - act with axle c on which moving part 2 is rotatably mounted . fig7 shows three rotational mobilities of the invention , that of lever 20 relative to axle a , of moving part 2 relative to axle b and of moving part 2 relative to axle c . according to the invention , axle b is formed on a translational element 9 assembled to translate relative to fixed part 1 . this translational mobility allows moving part 2 to move towards or away from moving part 1 . the fit - up of the two parts , fixed part 1 and moving part 2 , only occurs in translation , which creates a better seal and eliminates friction between the two parts . moreover , the possibility is offered of the moving part moving further away from the fixed part and ensuring greater accessibility of moving part 2 , in particular in the loading and unloading of packages 6 . in a preferred arrangement , fig4 to 7 in particular show a translational element 9 in the form of a rod equipped with a vertical section and fitted to translate in a housing 10 until meeting spring 11 with default recall of rod 9 in the remote position relative to fixed part 1 . element 9 also advantageously comprises a longitudinal part 22 extending from the rear part of fixed part 1 towards the front part , appreciably at the level of the underside of moving part 2 . axle of rotation b is positioned advantageously close to longitudinal part 22 . axle b is very slightly offset towards the rear relative to axle c so that in the final phase the rotation of lever 20 generates rotation of moving part 2 . the position close to axles b and c ensures great angular displacement between 0 and 90 °, especially if manual unloading is required , that is to say more than 90 ° if it is required to eject by force of gravity . with further reference to fig4 to 7 , element 9 and guiding - housing 10 are formed at the level of the rear face of fixed part 1 . at this level , a surface on stop 23 is able to co - act with moving part 2 so as to limit its rotational movement , especially during upward movement of moving part 2 towards fixed part 1 . moving part 2 comprises at least one receptacle 5 defining an internal volume accommodating a package 6 . receptacle 5 has an opening in its lower part to create a zone 8 for beverage discharge . the shape and the dimensions of receptacle 5 are adapted to the shapes and the dimensions of packages 6 . to facilitate the extraction of packages 6 during infusion chamber opening , according to a preferred embodiment , the device is equipped with a pusher 14 capable of being inserted inside the inner volume of receptacle 5 at the end of moving part 2 rotation so as to apply close to the lower part of package 6 and slightly or completely raise it outside the volume of receptacle 5 . an example of a pusher 4 is shown in fig1 during package 6 discharge . in the example shown , pusher 14 is created on lever 20 , appreciably towards the rear of the device , the angular displacement of moving part 2 being selected so that pusher 14 is introduced inside the volume of receptacle 5 at the end of rotation . fig9 to 12 also show an example of package 6 and the hot water part of the device acting together . thus , on fig9 , package 6 has an end - piece 4 through which hot water is introduced into package 6 , with or without preliminary piercing of end - piece 4 . an injection body 17 is also shown in which a central hole allows translational mobility of an injection head capable of bearing on the upper face of end - piece 4 , injection body 17 itself bearing on the upper face of package 6 positioned around end - piece 4 . thus , package 6 is particularly well immobilised and sealing can take place , for example , in the form of an o - ring formed between body 17 and the cylindrical part of the lateral surface of end - piece 4 . moreover , body 17 is surrounded by a crown 18 that can be applied on the upper surface of receptacle 5 . crown 18 is mobile in vertical translation until meeting return means of the type spring 19 . the configuration shown on fig1 has been reached when the device is in the closed position . at this stage , end - piece 4 executes vertical translation of injection head 7 leading to the opening of the hot water injection circuit passing into injection head 7 . simultaneously , body 17 applies around end - piece 4 so as to maintain and ensure its sealing function . as to crown 18 , this is in the retracted position due to the application of the perimeter of receptacle 5 . fig1 shows the device in the open position and fig1 more precisely illustrates the rest position of the hot water injection part of the device . in this configuration , injection head 7 is deployed in body 17 and is applied against it on meeting spring 16 . hot water can no longer flow through in this configuration . crown 18 is also in the deployed position at this time . hereafter , an explanation is given of the operation of a machine incorporating this device . in a first stage , lever 20 is positioned using handle 13 in a configuration similar to the one shown , for example , on fig8 for receiving one or more packages 6 in moving part 2 . the angular displacement of moving part 2 combined with vertical adjustment ensures excellent opening accessibility of receptacle 5 for introducing packages 6 . the operator then applies rotation to lever 20 which pivots on axle a . the sliding pivot linkage causes moving part 2 to pivot on axle b until reaching the straight position by application to the surface of stop 23 . as the pivot movement exerted by the user on lever 20 continues , moving part 2 then starts a vertical translatory movement until fit up with fixed part 1 through element 9 . the position on fig4 is reached via the position on fig5 . at this stage , the hot water injection circuit has been opened by the movement of head 7 acting as a valve in body 17 as shown on fig1 . actuating the machine then causes the hot water to enter package 6 . end - piece 4 may have been previously pierced by an appropriate device formed on injection head 7 . the operator can then apply opposite rotation on lever 20 so as to bring moving part 2 to the open position . by doing this , lever 20 generates firstly downward movement of element 9 corresponding to the position shown on fig2 , 5 and 7 . spring 11 will be of appropriate stiffness to facilitate this downward phase . on a preferred arrangement , spring 11 also allows translation in the downward phase so as to produce the rotation of moving part 2 only at the end of travel . once the downward movement is completed , element 9 reaches a stop formed by a shoulder 12 at the end of guiding - housing 10 . the translational movement stops and rotation of moving part 2 around axle b occurs until reaching the maximum angular displacement orientating moving part 2 towards the front of the machine to allow the operator access to package 6 . pusher 14 starts the unloading of package 6 so as to facilitate handling by the operator , in an alternative arrangement , angular displacement of moving part 2 is such that package 6 is ejected by simple force of gravity .
an extraction device for production of infusion drinks , includes an infusion chamber made up of a fixed part and a moving part which opens and closes the infusion chamber , a lever , mounted to rotate relative to an axle and drive the moving part in rotation relative to an axle , via a sliding pivot joint between the lever and the moving part , characterized in that the axle of rotation of the moving part is arranged on an element mounted such as to move relative to the fixed part to bring the moving part closer to or further away from the fixed part .