A rotary pump for a fluid metering system is provided. The rotary pump reciprocates, and is reversed by a signal from a limit switch that is deflected by an actuator arm on a rotating sleeve of the pump system.

A system for delivery of a medical fluid to a patient includes a pump system including a pressurizing unit to pressurize the medical fluid and a drive system in operative connection with the pressurizing unit. The pump system exhibits variation in pressure during operation. The system further includes a compensating system in fluid connection with the medical fluid pressurized by the pressurizing unit. The compensating system defines a displacement volume in fluid connection with the pressurized medical fluid that is altered in a predetermined manner to alter the variation in pressure. The compensating system can, for example, reduce pulsatility of pressure during flow.

A method and apparatus are disclosed for delivery of a drug to a recipient. In some embodiments, the delivery apparatus may unseal a drug containing reservoir. In some embodiments, the delivery rate may be controlled and/or adjustable. Optionally the apparatus may be disposable. Optionally, the apparatus may have a low profile and/or be wearable and/or attachable to the recipient. Optionally, discharge of the drug and/or unsealing of the reservoir may be driven by a plunger moving parallel to the base of the apparatus. Optionally, the apparatus may release a hypodermic needle into the recipient. Optionally, release of the hypodermic needle may be in a direction non-parallel and/or orthogonal to the direction of movement of the plunger. Optionally, prior to release, the hypodermic needle may be preserved in an aseptic state by a needle opening septum sealing a needle opening. Optionally, upon release, the hypodermic needle may pierce the needle opening septum.

A dual syringe fluid pump (100, 200, 300, 400) includes a motor (110, 210, 310, 410) with a rotatable shaft (112, 212, 312, 412), a first syringe (120a, 220a, 320a, 420a) with a first syringe plunger (122a, 222a, 322a, 422a) coupled to the rotatable shaft (112, 212, 312, 412), and a second syringe (120b, 220b, 320b, 420b) with a second syringe plunger (122b, 222b, 322b, 422b) coupled to the rotatable shaft (112, 212, 312, 412). The motor (110, 210, 310, 410) rotates the rotatable shaft (112, 212, 312, 412) to simultaneously move the first syringe plunger (122a, 222a, 322a, 422a) and the second syringe plunger (122b, 222b, 322b, 422b) and at least one of the syringes (120a,b, 220a,b, 320a,b, 420a,b) is adapted to convert the rotation of the rotatable shaft (112, 212, 312, 412) to a linear movement of at least one of the syringe plungers (122a,b, 222a,b, 322a,b, 422a,b).

A drive mechanism for a medicament delivery device is presented having a base member with a guide track structure that includes a first track, a second track, a rotator base member having a first guide structure that runs in the first track, a rotator housing coaxially arranged with and configured to engage with the rotator base member, the rotator housing having a second guide structure arranged at a fixed distance from the first guide structure and configured to run in the second track, a rotation device configured to actuate the rotator housing, and a medicament container carrier configured to receive a medicament container, wherein the medicament container carrier is coaxially arranged relative to the rotator base member and the rotator housing, the rotator housing being configured to rotate relative to the medicament container carrier.

A pump for treating a patient is disclosed that includes a spring-biased plunger biased toward actuation against a tube; a cam shaft configured to actuate the spring-based plunger; a lever actuatable between a closed position and an open position; a shaft coupled to the lever, the shaft having a central axis centrally along the length of the shaft, the shaft coupled to the lever to rotate around the central axis in accordance with actuation of the lever; and a lift cam pivotally coupled to the shaft, wherein the lift cam pivots around a lift cam axis, the lift cam axis of the lift cam is parallel to the central axis of the shaft, and the lift cam engages with the spring-based plunger to lift the spring-biased plunger off of the cam shaft as the shaft rotates in accordance with actuating the lever to the open position.

This invention discloses a drug infusion device, including: a drug storage unit; a piston and a driving wheel respectively connected with a screw, the driving wheel drives the screw to move by rotation, the piston is arranged in the drug storage unit, the screw advances the piston to move; a driving unit cooperating with the driving wheel, the driving unit includes more than two driving arms, the driving unit, through the multiple pivoting movement modes, drives driving arms to perform tooth number adjustable driving on the driving wheel for increment-adjustable infusion; and a power unit connected to the driving unit, the power unit exerts a force on the driving unit to lead the driving unit to perform a plurality of pivot steps. More than two driving arms are stalled on the driving unit, thereby achieving multi-level engagement on the driving wheel, and finally achieving the purpose of increment-adjustable infusion.

Devices, systems, and methods are provided herein for delivering medication (e.g., insulin) via a wearable pump having a patch-style form factor for adhesion to a user's body. The reusable pump may be coupled to a disposable cap housing a microdosing system for delivering precise, repeatable doses of medication to a cannula configured to deliver medication to a target infusion area beneath the user's outer skin layer. The system further may include an applicator for inserting the cannula into the user's skin and/or applying an adhesive pad to the skin.

Various fluid delivery systems are described comprising an infusion pump having a housing with a first opening and a hollow interior portion that is configured to receive a cartridge having a tubing. A pump unit can be disposed within the housing. The pump unit comprises a motor mechanically coupled with a crank shaft or eccentric cam that is configured to move a set of pistons or other objects to thereby compress one or more portions of the tubing over time as the crank shaft or eccentric cam rotates.

A unilateral-driven patch-type drug infusion device, includes: an infusion unit, which includes a drug storage unit; a screw connected to a piston and a driving wheel provided with wheel teeth, respectively, the driving wheel drives the screw to move by rotation, pushing the piston forward; at least one driving unit cooperating with the driving wheel, the driving unit includes at least one driving portion; a power unit and a reset unit coupled to the driving unit, and an infusion tube structure, which includes a base and an infusion needle, and the base includes an initial position, a working position, and an intermediate position. This infusion device can output controllable and stable driving force, which eliminates safety hazards and improves user experience.