An injection device for subcutaneous delivery of fluid which comprises a puncture cannula and an indwelling cannula. In a starting position, a distal end region of the puncture cannula runs coaxially inside the indwelling cannula. The device comprises displaceably mounted first and second runners. The first runner is connected to the puncture cannula and the second runner to the indwelling cannula. A control element is movable over a predefined control area. The control element is configured such that, in a first part of the control area, the control element effects an equidirectional displacement of the first and the second runners, and hence fitting of the indwelling cannula and, in a second part of the control area, effects blocking of the second runner, and hence holding of the indwelling cannula in a dwell position, and return of the first runner and withdrawal of the puncture cannula into an end position.

Examples of fluid delivery drive system and/or pump system that creates a vacuum in a fluid line for drawing and expelling fluid are provided. The vacuum may be created by separating two components that are positioned within the sealed fluid line. Once the two components are separated and the fluid is contained within the volume created between the separated components, the two components may be shuttled within the sealed volume. The movement of the two components can seal off an inlet to the fluid line and then open a pathway to an outlet from the fluid line while ensuring the created volume between the two components is maintained constant. The two components can then be moved back together to expel the fluid from the created volume through the outlet for delivery, for example, to a patient. Other examples are disclosed and described.

The present disclosure relates to a medical pump for dispensing a liquid. The medical pump includes a housing, a receptacle and a piston. The housing includes an inlet for receiving said liquid and an outlet for dispensing said liquid. The receptacle includes a chamber and a passage that is in fluid communication with the chamber. The receptacle is received in the housing and is axially movable relative to the housing from a filling position, wherein the passage fluidly communicates the chamber with the inlet, to a dispensing position, wherein the passage fluidly communicates the chamber with the outlet. The piston is received in the chamber and is configured such that when the receptacle is in the filling position the piston is axially moveable relative to the receptacle and when the receptacle is in the dispensing position the piston is axially moveable relative to the receptacle.

A pump device includes a rotary motor, a compartment for insertion of a disposable pump part, and one or more pulsation-reduction elements. The disposable pump part includes an input port, an output port, and a dual-action reciprocating assembly. The input port is configured for intaking fluid. The output port is configured for outputting the fluid. The dual-action reciprocating assembly is configured for pumping the fluid. The assembly includes a single piston and a rod configured to be coupled to the rotary motor, so as to drive the piston. The one or more pulsation-reduction elements are configured to reduce a pulsation in the outputted fluid, caused by the single-piston dual-action reciprocating assembly.

A micropump according to the invention uses axially oriented pistons to define a pump volume. Translating the pistons axially with respect to each other within a pump housing draws a metered amount of fluid into the pump volume from a reservoir port for delivery to a cannula port when the space is collapsed. Radially situated seals on the pistons cooperate with the axial movement to close off and open the cannula port and the reservoir port respectively at different positions of the piston stroke.

A first tube connector and a second tube connector are to be automatically and mechanically attached to and detached from each other. Provided is an attaching/detaching device (100) including: a fixing portion (104) configured to fix a first tube connector (105); a holding portion (107) configured to hold a second tube connector (106); a moving portion configured to move the holding portion (107), which holds the second tube connector (106), in a direction of approaching the first tube connector (105) to connect the second tube connector (106) to the first tube connector (105), and move the second tube connector (106) after the connection in a direction of separating from the first tube connector (105) to release the connection of the second tube connector (106) and the first tube connector (105).

There is described a patch pump comprising a cartridge, a power source, a pump system, a drug delivery device and a control system configured to operate in particular the pump system and the drug delivery device. The pump system comprises, on the one hand, a pump having a pump housing containing a pump piston and a valve piston and, on the other hand, a pump drive comprising a piston motor and a valve motor for driving the pump piston and the valve piston independently from each other through a first and a second transmission. The drug delivery device comprises a transdermal delivery system having a needle actuation mechanism configured for transdermal insertion of a cannula.

A novel embodiment of a pump system, for example, of the type that would be used in a wearable drug delivery system, comprises dual linear-actuated plungers disposed in a pump chamber. The plungers are coupled to a leadscrew having both left-hand and right-hand threads such that rotation of leadscrew in a first direction moves the plungers together and rotation of leadscrew in a second, opposite direction moves the plungers apart. Movement of the plungers away from each other draws one or more doses of a liquid drug from a reservoir into the pump chamber, while movement of the plungers together forces liquid drug to a patient interface for delivery to the patient.

A syringe actuating device has a first supporting plate in which an axial guide for a primary rod is defined and a second supporting plate defining at least two engagement seats for bases of corresponding syringes having a barrel and a sliding plunger. A guide for axial sliding of a corresponding secondary rod with a head is associated with each of the engagement seats. The device also includes an electric motor having a driving shaft, an assembly for converting rotary motion of the shaft into translational motion of the primary rod and a pair of connecting arms adapted to transmit sliding motion of the primary rod to a corresponding one of the secondary rods. Rotary movement of the driving shaft causes sliding of the secondary rods and, consequently, sliding of the plungers when the syringes are engaged in corresponding engagement seats and the plungers are in abutment against the heads.

Examples of fluid delivery drive system and/or pump system that creates a vacuum in a fluid line for drawing and expelling fluid are provided. The vacuum may be created by separating two components that are positioned within the sealed fluid line. Once the two components are separated and the fluid is contained within the volume created between the separated components, the two components may be shuttled within the sealed volume. The movement of the two components can seal off an inlet to the fluid line and then open a pathway to an outlet from the fluid line while ensuring the created volume between the two components is maintained constant. The two components can then be moved back together to expel the fluid from the created volume through the outlet for delivery, for example, to a patient. Other examples are disclosed and described.