Abstract: Infusion pump system and associated methods The invention provides a fluid delivery system (1), comprising: an outlet tube (6); a pump (2) for pumping liquid along a fluid path (100) including the outlet tube; a closed sensing tube (104) branched from the fluid path which, in use, is filled with gas; and a sensor (108) configured to sense movement of a liquid front within the sensing tube and, responsive to sensing of said movement, determine that a partial or total occlusion has occurred within the outlet tube.

Abstract: A fluid delivery system (1) includes a reservoir (7) for storing a fluid, a pumping chamber (8) and an actuator (20). The pumping chamber (8) has a volume, an inlet valve (48) providing selective fluid communication between the pumping chamber volume and the reservoir, an outlet valve (49), and a membrane (47) the displacement of which changes the pumping chamber volume. The actuator (20) moves a drive member (21) in reciprocating motion. The actuator (20) is disposed in a housing (9) having an aperture (36) from which the drive member projects. The reservoir (7) and the pumping chamber (8) are arranged in a cartridge (3) removably attachable to the housing. When the cartridge (3) is attached to the housing (9) the drive member (20) is operatively coupled to the pumping chamber membrane (47). The fluid delivery system may be applied to an infusion system for the infusion of a liquid therapeutic product, such as insulin.

Abstract: The present invention proposes assigning a common system identification code to each of a control unit and a plurality of controllable slave units, storing that system identification code in a user-inaccessible memory of those units, and allowing pairing between the control unit and each of the slave units only if the system identification code of the control unit matches that of the respective slave unit. Thus a slave unit can only act upon a control signal if the control signal comes from the control master unit which shares the system identification code, i.e. is verifiably from the same family. This ensures that a slave unit only acts on instructions which come from a specified control unit, so providing security to the user. It is therefore impossible for a slave unit to act on instructions from any device other than the control master unit with which it shares a system identification code, which may be alternatively referred to as a family identification code or family ID.

Abstract: The present invention proposes assigning a common system identification code to each of a control unit and a plurality of controllable slave units, storing that system identification code in a user-inaccessible memory of those units, and allowing pairing between the control unit and each of the slave units only if the system identification code of the control unit matches that of the respective slave unit. Thus a slave unit can only act upon a control signal if the control signal comes from the control master unit which shares the system identification code, i.e. is verifiably from the same family. This ensures that a slave unit only acts on instructions which come from a specified control unit, so providing security to the user. It is therefore impossible for a slave unit to act on instructions from any device other than the control master unit with which it shares a system identification code, which may be alternatively referred to as a family identification code or family ID.

Abstract: A fluid delivery system (1) includes a reservoir (7) for storing a fluid, a pumping chamber (8) and an actuator (20). The pumping chamber (8) has a volume, an inlet valve (48) providing selective fluid communication between the pumping chamber volume and the reservoir, an outlet valve (49), and a membrane (47) the displacement of which changes the pumping chamber volume. The actuator (20) moves a drive member (21) in reciprocating motion. The actuator (20) is disposed in a housing (9) having an aperture (36) from which the drive member projects. The reservoir (7) and the pumping chamber (8) are arranged in a cartridge (3) removably attachable to the housing. When the cartridge (3) is attached to the housing (9) the drive member (20) is operatively coupled to the pumping chamber membrane (47). The fluid delivery system may be applied to an infusion system for the infusion of a liquid therapeutic product, such as insulin.

Abstract: Infusion pump system and associated methods The invention provides a fluid delivery system (1), comprising: an outlet tube (6); a pump (2) for pumping liquid along a fluid path (100) including the outlet tube; a closed sensing tube (104) branched from the fluid path which, in use, is filled with gas; and a sensor (108) configured to sense movement of a liquid front within the sensing tube and, responsive to sensing of said movement, determine that a partial or total occlusion has occurred within the outlet tube.

Abstract: A pumping chamber (8) for a micro-pump (2), the pumping chamber having a volume of 100 micro litres or less bounded by an interior wall and having an inlet (87) and an outlet (88), wherein the interior wall has at least one inwardly projecting rib (70) having a first end adjacent the inlet and a second end adjacent the outlet.

Abstract: The invention generally provides a fluid delivery system comprising: a reservoir (7); a pumping chamber (8) having a volume, an inlet valve (48), an outlet valve (49) and a membrane (47); an actuator (20); and a drive member (21). The inlet valve and the outlet valve each comprise a passive normally closed one-way check valve. The inlet valve provides selective fluid communication between the pumping chamber volume and the reservoir. Fluid in the reservoir is at substantially ambient pressure. The drive member is operatively coupled to the pumping chamber membrane. Energising the actuator moves the drive member in reciprocating motion and thereby displaces the membrane to change the pumping chamber volume between a minimum volume and a maximum volume. The pumping chamber volume is held at a pressure above the ambient pressure in the reservoir when the actuator is at rest.

Abstract: There is provided a fluid delivery system (100), comprising a pump (102) for pumping fluid from a cartridge (400) to an outlet. The pump comprises a housing (302), a cartridge which can be removably attached to the housing, and a switch (308) for activating the pump. The switch is arranged such that attaching the cartridge to the housing activates the switch to automatically activate the pump. The system may also include a control unit for wireless connection with the pump.

Abstract: The invention provides an actuator having a wedge shaped member arranged to move in substantially linear reciprocating motion. A drive member is operatively coupled to the wedge shaped member. The wedge shaped member is arranged to deflect the drive member as the wedge shaped member moves. A shape memory material has a first end electrically connected to a first electrical connection terminal and fixed with respect to the first electrical connection terminal, and a second end electrically connected to the wedge shaped member and fixed with respect to the wedge shaped member. The wedge shaped member is electrically connected to a second electrical connection terminal. The actuator may be used in a pump having a pumping chamber with a membrane the displacement of which changes the pumping chamber volume. The drive member of the actuator is operatively coupled to the pumping chamber membrane. The pump may be used in an infusion system for the infusion of a liquid therapeutic product.