Abstract: A pumping device includes a working chamber and a piston provided to slide in the working chamber so as to vary the useful volume of the chamber during pumping, and anti-rotation elements for the piston. Advantageously, the anti-rotation elements include an index (107) mounted radially with respect to the axis of the piston and the device includes a longitudinal slot (108), the index being provided so as to move in the slot. Advantageously, the index (107) has two approximately parallel planar faces that extend longitudinally.

Abstract: The invention relates to a device (1) for monitoring sample-collection carried out using a piston pump (3, 8) such as a syringe, characterized in that said device includes a pressure sensor (11) close to the suction and/or delivery opening (6). Said device is in particular suited for use in an analysis automaton, in particular for analyzing a blood sample. Such a sensor guarantees that the liquid to be analyzed is properly sucked up, in particular that no air is sucked up and that neither the suction or delivery sides are blocked.

Abstract: A pumping device includes a working chamber and a piston provided to slide in the working chamber so as to vary the useful volume of the chamber during pumping, and anti-rotation elements for the piston. Advantageously, the anti-rotation elements include an index (107) mounted radially with respect to the axis of the piston and the device includes a longitudinal slot (108), the index being provided so as to move in the slot. Advantageously, the index (107) has two approximately parallel planar faces that extend longitudinally.

Abstract: The invention relates to a device (1) for monitoring sample-collection carried out using a piston pump (3, 8) such as a syringe, characterised in that said device includes a pressure sensor (11) close to the suction and/or delivery opening (6). Said device is in particular suited for use in an analysis automaton, in particular for analysing a blood sample. Such a sensor guarantees that the liquid to be analysed is properly sucked up, in particular that no air is sucked up and that neither the suction or delivery sides are blocked.

Abstract: A pumping device including a housing whose front face is at least partly formed by a block of transparent material, this block containing a number of machine-drilled holes including at least one blind hole forming a work chamber, at least one hole forming an admission and/or exhaust channel leading into the blind hole, two through channels whose orifices on the front face of the block are fitted with hydraulic hose connection means, two solenoid valves, a plunger sliding leaktightly in a bearing fitted to the orifice of the blind hole, this plunger defining with the blind hole a volume that varies as a function of the axial position of the plunger, and a module connected to the base of the plunger for moving the plunger translationally. The pumping device can be used for pipetting, dilution, rinsing and/or dispensing of samples, regardless of the envisaged volume ranges.

Abstract: The pump unit according to the invention is formed by assembling a pump module (9) comprising a body having a cavity (10) forming a working chamber, a translationally mobile piston (15) engaging leaktightly in the cavity (10) via a seal (14), at least one channel (12, 13) formed in the body to connect the working chamber to a use circuit, a linear actuating module comprising an actuating member (3) that is translationally mobile coaxially with the piston (15), and a connecting and guiding module (18) for establishing a mechanical connection between the pump module (9) and the linear actuating module (2) and for precise guidance of the piston (15) coaxially with the seal.

Abstract: The invention relates to a pumping device comprising: a housing (1) whose front face (2) is at least partly formed by a block of transparent material (3), this block (3) containing a number of machine-drilled holes including at least one blind hole (4) forming a work chamber (17), at least one hole forming an admission and/or exhaust channel (5) leading into the blind hole (4), two through channels (6, 7) whose orifices (10, 11) on the front face (8) of the block (3) are fitted with hydraulic hose connection means, two solenoid valves, a plunger (15) sliding leaktightly in a bearing (16) fitted to the orifice of the blind hole (4), this plunger (15) defining with said blind hole (4) a volume that varies as a function of the axial position of the plunger (15), and a module connected to the base of the plunger for moving the plunger (15) translationally. The invention applies to the pipetting, dilution, rinsing and/or dispensing of samples, that is to say irrespective of the envisaged sections of volume.