Device for positioning a profiled body of an aerator, and an aerator comprising said device

Abstract

A device for positioning profiled aerator body in a movement range that corresponds to the flow-rate range of the aerator, wherein the profiled body ( 12 ) includes a cylindrical member ( 30 ) having an axis parallel to the movement direction of the body relative to the holder, the holder ( 10 ) includes a cylindrical housing having a section complementary to that of the cylindrical member ( 30 ), and the device further includes an O ring ( 24 ) provided between the cylindrical member ( 30 ) and the cylindrical housing of the holder ( 10 ) and maintained on the holder ( 10 ) so that it permits a relative movement of the profiled body and of the holder by a sliding movement of the O ring ( 24 ) on the profiled body. The device can be used in automobiles.

1 . A device for positioning a profiled body of an aerator in relation to a support within a displacement range corresponding to a flow-rate range of the aerator, 
     characterised in that
 the profiled body ( 12 ) has a cylindrical member ( 30 ) with an axis which is parallel to the direction of displacement of the body in relation to the support, 
 the support ( 10 ) comprises a cylindrical receptacle with a cross-section complementary to that of the cylindrical member ( 30 ) of the body, and 
 the device additionally comprises an O-ring ( 24 ) which is arranged between the cylindrical member of the profiled body ( 12 ) and the cylindrical receptacle of the support ( 10 ) and is held on a first of the components selected from the profiled body ( 12 ) and the support ( 10 ) in order to allow relative displacement of the profiled body and the support by means of the O-ring ( 24 ), which slides along the second of the components selected from the profiled body and the support. 
 
   
   
       2 . A device according to  claim 1 , characterised in that the O-ring ( 24 ) is held on the support. 
   
   
       3 . A device according to  claim 2 , characterised in that the cylindrical member ( 30 ) of the profiled body ( 12 ) has a groove ( 34 ,  36 ) over at least member of its circumference in a position which corresponds to the position of the O-ring ( 24 ) when the cylindrical member ( 30 ) is at one end of the displacement range of the profiled body ( 12 ) in relation to the support ( 10 ). 
   
   
       4 . A device according to  claim 3 , characterised in that the cylindrical member ( 30 ) of the profiled body comprises a groove ( 34 ,  36 ) at each of the two ends of the displacement range. 
   
   
       5 . A device according to  claim 1 , characterised in that the cylindrical member ( 30 ) of the profiled body ( 12 ) has a cross-section comprising a core and at least one wing ( 32 ), and the support ( 10 ) is in the form of a tube ( 14 ) having at least one longitudinal channel ( 18 ) for receiving the wing ( 32 ), the thickness of the tube being less than the radial dimension of the wing. 
   
   
       6 . A device according to  claim 5 , characterised in that the support has three channels ( 18 ) and the profiled body has three w-ings ( 32 ). 
   
   
       7 . A device according to  claim 5 , characterised in that the groove ( 34 ,  36 ) at least in the cylindrical member of the profiled body ( 12 ) is formed solely in the wing ( 32 ). 
   
   
       8 . A device according to  claim 2 , characterised in that the support ( 10 ) contains a device for holding the O-ring, which device comprises a localised recess ( 26 ) in the channel ( 18 ) in its portion furthest away from the centre of the tube, the dimension of the recess ( 26 ) in the direction of the displacement axis being in the order of magnitude of the width of the O-ring ( 24 ). 
   
   
       9 . A device according to  claim 1 , characterised in that the support ( 10 ) is connected by arms ( 22 ) to a ring in the form of a spherical segment. 
   
   
       10 . An aerator with adjustment of the orientation and flow-rate of a flow of air, of the type comprising:
 a conduit for the flow of air, having a chamber with a cross-section of which a portion of the inner surface forms a spherical segment,   a profiled body ( 12 ), the majority of which is arranged in the chamber of the conduit and has a progressively increasing, then progressively decreasing cross-section, and   a ring co-operating with the conduit and with the profiled body ( 12 ) in order to support the profiled body ( 12 ) in the conduit while permitting displacement of the profiled body in relation to the conduit, the ring having an outer surface forming a spherical portion which has practically the same radius as the spherical segment of the chamber, characterised in that the profiled body ( 12 ) is mounted on the ring by means of a positioning device according to  claim 1 .   
   
   
       11 . A device according to  claim 6 , characterised in that the groove ( 34 ,  36 ) at least in the cylindrical member of the profiled body ( 12 ) is formed solely in the wing ( 32 ).