Abstract: The subject of the invention is a device for positioning an object in space, comprising at least 4 plates, each one able to move with respect to another of said plates which is contiguous with it along one of the 3 axes of space, it being possible for the movement of one plate with respect to another plate to be guided by a tenon/mortise assembly in which said tenon is secured to one of the plates and its mortise is produced in the other plate, the spatial orientation of each of the tenon/mortise assemblies being different from the other 2 and along one of the 3 axes of space.

Abstract: The invention relates to a sampling valve and to a device equipped with such a valve notably allowing haematology measurements to be taken from a blood sample. The valve comprise two external parts, one internal part clamped between said external parts, and means for regulating the relative angular position of these parts about an axis of rotation. The internal part has opposite surfaces pressing in a sealed and sliding manner against adjacent surfaces of the external parts. The external parts comprise orifices, loops and ducts, said loops and said ducts being arranged in such a way as to communicate selectively with orifices passing through the internal part. The valve parts have no aliquot return groove or recess or labyrinth, thereby eliminating regions of turbulence. The valve is characterized in that two of the parts are able to rotate about the axis of rotation with respect to one of the said parts which is stationary, the rotary parts preferably being the external parts.

Abstract: The invention relates to a sampling valve and to a device equipped with such a valve notably allowing haematogy Ineasttrenreaat to be taken from a blood sample. The valve comprise two external parts, one internal part clamped between said exterrtal parts, and means for regulating the relative angular position of these parts about to axis of rotation. The mienial part has opposite surfaces pressing in a sealed and sliding manner against adjacent surfaces of the external parts. The external parts comprise orifices, loops and ducts, said loops and said ducts being arranged in such a way as to communicate selectively with orifices passing through the internal part. The valve parts have no aliquot return groove or recess or labyrinth, thereby eliminating regions of turbulence. The valve is characterized in that two of the parts are able to rotate about the axis of rotation with respect to one of the said pans which is stationary, the rotary parts preferably being the external parts.

Abstract: The subject of the invention is a device for positioning an object in space, comprising at least 4 plates, each one able to move with respect to another of said plates which is contiguous with it along one of the 3 axes of space, it being possible for the movement of one plate with respect to another plate to be guided by a tenon/mortise assembly in which said tenon is secured to one of the plates and its mortise is produced in the other plate, the spatial orientation of each of the tenon/mortise assemblies being different from the other 2 and along one of the 3 axes of space.