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 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.

[Problem] Provided is an infusion pump in which a forward rotation and a reverse rotation of a rotor of a drive motor can be detected so as to be able to safely deliver drug to a patient. An infusion pump 1 includes a drive motor 61, a liquid delivering drive unit 60 that delivers drug inside an infusion tube by Dressing an infusion tube 200 on account of a rotor of the drive motor 61 in forward rotation, a rotational direction detection device 700 that generates detection information 780 regarding a rotational direction for judging whether the rotor of the drive motor 61 is in the forward rotation or reverse rotation, and a control unit 100 that judges whether a rotor 161A of the drive motor 61 is in the forward rotation or the reverse rotation based on the detection information 780 regarding the rotational direction obtained from the rotational direction detection device 700.

An automatic fluid injection device comprising: a base body (1) for coming into contact with an injection zone; a support assembly (2) for supporting an actuator mechanism (5, 6, 7) that is controlled by power supply means (11); at least one fluid reservoir (3), each containing an injection piston (35), arranged in said base body (1); a needle assembly (100) comprising an insertion actuator (8), needle movement means (9, 9), a priming needle (101) for associating with each reservoir (3) and for penetrating into said reservoir (3) before moving its piston (35), and an injection needle (102) for penetrating into the injection zone and for injecting the contents of said reservoir(s) (3) into said injection zone, said device including at least one actuator button (200) for priming, inserting the injection needle into the injection zone, administering fluid, and then retracting the injection needle.

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.

Systems and methods for continuous injection of fluid, in some examples these apparatuses may include a manifold, a pair of reciprocating pistons, and an actuation control that may apply both suction (aspiration) and injection of fluid as part of the same actuation. The systems and methods may be configured to simplify the operation of a continuous fluid injection system, including one that aspirated prior, to injection to confirm the absence/presence of blood.

A dual chamber single-hand pump is described that includes a pump chamber with four fluid pathways. Two pathways are configured to conduct fluid to the chamber and to stop flow therethrough from the chamber, and two pathways are configured to conduct fluid from the chamber and to stop flow therethrough to the chamber. A piston positioned and moveable within the chamber separates two of the pathways from the other two pathways within the chamber. The pump can be held in a single hand by having finger grips for stabilizing the pump and a palm grip for advancing the piston. A return spring can return the piston to the original position when the palm is relaxed to allow expansion of the spring.

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.

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 pump assembly useful for pumping a medicament through an injection port which is removably mountable onto a patient body surface for defining a medicament injection pathway, the pump assembly including a timed pumping assembly adapted for pumping the medicament through the injection port at a given time and a removable mounting adapted for removable mounting of the timed pumping assembly onto the injection port, whereby when the timed pumping assembly is mounted onto the injection port, the medicament can be pumped by the time pumping assembly through the medicament injection pathway.