Abstract: A method for assembling a valve is disclosed. The valve includes a first fluid port, a second fluid port, a fluid path providing fluid communication therebetween, a moveable member, a biasing member and a pressure compensation membrane. The method includes the steps of providing a base member comprising an abutment for receiving a first of the biasing member and the pressure compensation membrane; assembling the biasing member and the pressure compensation membrane with the base member; and affixing a fixing member to the base member to retain the biasing member and the pressure compensation membrane between the fixing member and the abutment.

Abstract: A pump having two pistons which are driven by a cam belonging to an external rotor and which are inserted into two cylinder blocks mounted parallel to each other in such a way as to form two opposite, parallel, eccentric pump chambers The pump chambers have at least one inlet port through which liquid is drawn into the pump chambers during the fill stroke of the pistons, and then expelled from the pump chambers during the discharge stroke of the pistons to at least one outlet port, the outflow rate of which is constant and even.

Abstract: A method for assembling a valve is disclosed. The valve includes a first fluid port, a second fluid port, a fluid path providing fluid communication therebetween, a moveable member, a biasing member and a pressure compensation membrane. The method includes the steps of providing a base member comprising an abutment for receiving a first of the biasing member and the pressure compensation membrane; assembling the biasing member and the pressure compensation membrane with the base member; and affixing a fixing member to the base member to retain the biasing member and the pressure compensation membrane between the fixing member and the abutment.

Abstract: A pump having two pistons which are driven by a cam belonging to an external rotor and which are inserted into two cylinder blocks mounted parallel to each other in such a way as to form two opposite, parallel, eccentric pump chambers The pump chambers have at least one inlet port through which liquid is drawn into the pump chambers during the fill stroke of the pistons, and then expelled from the pump chambers during the discharge stroke of the pistons to at least one outlet port, the outflow rate of which is constant and even.

Abstract: A system for performing fluid administration on a patient, the system including a flexible membrane forming a valve of a port having a valve seat, and an actuator having an actuator head, wherein the flexible membrane includes a membrane actuator clip configured to removably connect to the actuator head, the connection between the membrane actuator clip and the actuator head allowing the actuator to push the flexible membrane towards the valve seat to close the valve, and to pull the flexible membrane away from the valve seat to open the valve.

Abstract: A pump having two pistons placed in a rotor, situated in a stator forming two opposite parallel eccentric pumping chambers having at least one inlet port through which the fluid is drawn into at least one of the pumping chambers during the filling movement of at least one of the pistons and, subsequently, expelled from at least one of the pumping chambers, during the emptying movement of at least one of the pistons, to at least one outlet port, characterized by an inlet cavity in connection with the inlet port, an outlet cavity in connection with the outlet port and two port changeover transition zones situated between each side of the cavities.

Abstract: A pump having two pistons which are parallel and in opposition and are disposed in two, cylindrical, cavities in a pump body, including at least one inlet port and at least one outlet port connected to a rotational port-switching device which can move axially along its rotational axis and is held in abutment in the pump body by a restoring member, in the form of a spring.

Abstract: The invention relates to a thermoregulated device for modifying the consistency of a starting composition that comprises a preparation at least partially mixed with a liquid. For this purpose, the device is configured to accommodate a reservoir (3; 203; 303; 403; 503; 603; 703) containing the starting composition and possessing two opposing faces, at least one of which comprises a flexible section, the device comprising a thermoregulated element (2; 202; 302; 402) having a predefined contact surface arranged to come into contact with one of the opposing faces of the reservoir (3; 203; 303; 403; 503), as well as stirring means for mixing the composition in the reservoir (3; 203; 303; 403).

Abstract: The invention relates to a miniature portable pump with mechanical actuation, preferably without a motor, provided with a bowed piston for injecting fluid by manual dosing and/or continuously. The pump consists of a small number of parts with very low production cost, for injecting medication, preferably subcutaneously.

Abstract: A fluid delivery device for delivering small quantities of fluid such as insulin to a patient, including a disposable unit having a disposable housing that has one lower part and one upper part, which together form a shell that defines an internal partial toroidal arcuate cavity. The housing fits together with a drive unit. The housing contains an arcuate cylinder for containing fluid to be delivered, a piston movably mounted in the cylinder for driving out fluid to be delivered, an adhesive support for attaching the housing and a cannula that when the housing is attached to a patient is insertable in the patient's skin for delivering fluid. The drive unit is preferably removably mounted on a front of the housing opposite the adhesive support, the removable drive unit having a shape that when fitted complements the shape of the front face of the housing to form with the housing.

Abstract: A pump having two pistons placed in a rotor, situated in a stator forming two opposite parallel eccentric pumping chambers having at least one inlet port through which the fluid is drawn into at least one of the pumping chambers during the filling movement of at least one of the pistons and, subsequently, expelled from at least one of the pumping chambers, during the emptying movement of at least one of the pistons, to at least one outlet port, characterized by an inlet cavity in connection with the inlet port, an outlet cavity in connection with the outlet port and two port changeover transition zones situated between each side of the cavities.

Abstract: The pump includes a housing containing a hollow elongated part, a piston arranged to move back and forth inside an elongated part, an inlet port and an outlet port arranged so that a fluid can be sucked through the inlet port into a chamber during an instroke of the piston and expelled through the outlet port during an outstroke. A linearly and/or angularly actuable valve system has a valve holder mounted on the pump housing which includes at least one through-hole extending from the piston chamber to the housing outer surface. The valve holder contains an inlet and/or outlet to alternately connect the inlet and outlet ports of the volumetric pump.

Abstract: The invention concerns a system and a method of use of said system for performing fluid administration on a patient, the system comprising: a liquid pump (1), a liquid distribution system (2) connected to said pump (1) in such a way that liquid can flow from the liquid distribution system (2) to the pump (1) and vice versa, liquid supply means (3) for supplying liquid to a patient (4) via said liquid distribution system (2) and said pump (1), a patient conduit (5) adapted for connecting said liquid distribution system (2) to a patient (4), the system being characterized by the fact that said liquid distribution system (2) comprises two distinct hub chambers (7,8), the first hub chamber (7) including at least one liquid supply port with dedicated valve means (9), one patient port with dedicated valve means (10) and one pump inlet (26), the second hub chamber (8) including at least, one patient port (18) or warmer port (16) with dedicated valve means and one pump outlet (27), said system furthermore comprisi

Abstract: The invention concerns a system and a method of use of said system for performing fluid administration on a patient, the system comprising a liquid pump, a liquid distribution system, a liquid supply means, and patient conduit. The liquid distribution system comprises two distinct hub chambers. The first hub chamber includes at least one liquid supply port with a dedicated valve means, one patient port with dedicated valve means, and one pump inlet. The second hub chamber includes at least one patient port or warmer port with dedicated valve means and one pump outlet. The system further comprises control means arranged to close the patient port of the first hub chamber when the liquid supply port is open, and vice versa.

Abstract: A peristaltic pumping system comprises a flexible tube, a substantially cylindrical rotating roller unit containing a series of rollers which are freely rotating around their axes and freely moving along a radial segment, holding mechanism for commonly holding the rollers, a central spreader element for pushing the rollers against the flexible tube and a driving unit comprising a driving coupling element, and the holding mechanism is made of at least one planar element having retaining and guiding means for rollers, and the planar element is furthermore adapted to be directly coupled to the coupling element in such a way that rollers are driven through the planar element.

Abstract: A fluid pumping device having a pump housing containing a piston chamber and a reciprocating piston, an inlet port and an outlet port allowing a fluid to enter the piston chamber during an instroke of the piston and be expelled during an outstroke. The device further having a valve switching element movably mounted against a valve base member, with a piston chamber aperture connected to the piston chamber and an inlet aperture and an outlet aperture connected respectively to the inlet and outlet ports of the fluid pumping device. The element has a grooves in the valve base member providing, a first communication between the inlet aperture and the piston chamber aperture so that fluid is sucked, into the piston chamber during part of the piston instroke, and a second communication aperture expelling fluid out of the piston chamber, through the outlet port during part of the piston outstroke.

Abstract: In one embodiment, a volumetric pump in a medical fluid delivery system comprises at least one piston in a hollow cylinder, the pump having at least one inlet port through which a medical fluid can be sucked into a pump chamber during an instroke of said piston, and at least one outlet port through which the medical fluid can be expelled during an outstroke of the piston. The piston or the hollow cylinder can be actuated directly or indirectly by a rotor. This rotor transmits on the one hand a bi-directional linear movement to the piston or to the cylinder and on the other hand, a bi-directional angular movement either to the piston or to another ratable element in order to open and close alternately the inlet and outlet ports.

Abstract: The present invention relates to a pressure measurement unit to determine positive and negative fluid pressure within a disposable for medical devices. As part of the disposable, the invention consists of a rigid measurement chamber, which is covered by an elastic form part. This measurement chamber can be connected to a medical device, which is equipped with a pressure transducer. Specific shapes of the elastic form part and specific instrument interfaces ensure the connection between this elastic form part, the measurement chamber and the pressure transducer to exclude the influence of atmospheric pressure during measurements. The coupling and the sealing ability against atmospheric pressure is controllable. Such pressure measurement units can be used to measure fluid pressure in disposable to control for example fluid pumps.

Abstract: The pump includes a housing containing a hollow elongated part, a piston arranged to move back and forth inside an elongated part, an inlet port and an outlet port arranged so that a fluid can be sucked through the inlet port into a chamber during an instroke of the piston and expelled through the outlet port during an outstroke. A linearly and/or angularly actuable valve system has a valve holder mounted on the pump housing which includes at least one through-hole extending from the piston chamber to the housing outer surface. The valve holder contains an inlet and/or outlet to alternately connect the inlet and outlet ports of the volumetric pump.

Abstract: A micropump comprises a valve system having one gasket (10) shaped to define three cavities (12, 12a, 12b) connected respectively to a piston chamber, an inlet port and an outlet port of the pump. A valve switching element (16) having at least one groove (17) is movably mounted on the gasket such that, during piston instrokes, said groove moves along a part of the gasket adjacent to the cavities connected respectively to the piston chamber and the inlet port of the pump, thereby creating a leakage between said cavities so that fluid is sucked into the piston chamber during a piston instroke. During piston outstrokes, said groove moves along a part of the gasket adjacent to the cavities connected respectively to the piston chamber and the outlet port of the pump, thereby creating a leakage between said cavities so that fluid is expelled out of the piston chamber through the outlet port during a piston outstroke.