A pump device includes a pump driver comprising a first diaphragm and a second diaphragm, the first and second diaphragms each comprising a middle portion bounded by an outer portion, the first and second diaphragms being spatially separated from each other at the respective outer portions, and coupled together at the respective middle portions. The pump also includes a fluid passageway and a pump chamber fluidly connected to the fluid passageway, wherein the pump chamber comprises a moveable wall coupled to the pump driver at the middle portions of the first and second diaphragms such that a fluid movement between the pump chamber and the fluid passageway is induced by movement of the middle portions. An input device is configured to obtain a target flow rate. A controller is configured to operate the pump driver and a flow regulator based on signals received from a flow detector.

Fluid dispensing device, having a pump connected to a reservoir and to a head. A piston (22) is connected to a piston rod (25) and provided with a push-button (26) to actuate the pump. A spring (27) brings the piston to the rest position after actuation. The body has a T-like connection (24), with a first branch connected to the metering chamber, a second branch connected to the reservoir and a third branch is connected to the head. A first valve (41) is provided in the second branch and a second valve (51) in the third branch, the valves are urged against the first and second respective valve seats (43, 53). The device has dose a adjustment (28, 29) cooperating with the piston rod and has a bush (29) coaxially around the piston rod movable to adjust the rest position of the piston.

The present disclosure provides a new and innovative method and system for flow rate compensation in devices, such as infusion pumps. In various embodiments, a computer-implemented method includes determining a location of a plurality of infusion pumps in a pump stack including the plurality of infusion pumps and a fluid supply connected to each of the plurality of infusion pumps. The computer-implemented method also includes determining a reference infusion pump, in the plurality of infusion pumps, and adjusting the flow rate for each infusion pump in the plurality of infusion pumps based on the distance between the infusion pump and the reference infusion pump.

Check valves are described herein. A check valve includes an inlet body, an outlet body, a valve body, a valve member, and a wiping extension. The inlet body defines an inlet portion. The outlet body defines an outlet portion. The valve body is coupled between the inlet bod and the outlet body. The valve body defines a valve cavity. The valve cavity is in fluid communication with the inlet portion and the outlet portion. The valve member is disposed within the valve cavity. The valve member is configured to permit flow from the inlet portion to the outlet portion and prevent flow from the outlet portion to the inlet portion. The wiping extension extends from the valve body toward the valve member. The wiping extension is movable relative to the valve member to dislodge particulate from the valve member.

A wearable infusion pump assembly. The wearable infusion pump assembly includes a reservoir for receiving an infusible fluid and a fluid delivery system configured to deliver the infusible fluid from the reservoir to an external infusion set. The fluid delivery system includes a controller, a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the external infusion set, the pump assembly comprising a pump plunger, the pump plunger having distance of travel, the distance of travel having a starting position and an ending position, at least one optical sensor assembly for sensing the starting position and ending position of the pump plunger distance of travel and sending sensor output to the controller, and a first valve assembly configured to selectively isolate the pump assembly from the reservoir, wherein the controller receives the sensor output and determines the total displacement of the pump plunger.

A device, system and method are provided for controlling the rate of infusion of fluids during infusion therapy using non-electric infusion devices. Rotation of a flow regulator dial causes an orifice connected to the inlet to modify its position relative to a particular one or more orifices or groove portions, the characteristics of which provide a certain flow rate characteristic. The flow regulator allows for the infusion pump to infuse at a rate that may be varied during use by the user. Additionally, the flow regulator is made from a material selected to operate under a wide range of pressures, from 5-40 PSI, making the flow regulator compatible with pressurized devices, such as, a non-electric pump.

The present invention discloses a pump for measuring a pressure of fluid to be transferred, a fluid transport system using the same, and a method for operating the system. The pump includes a pumping portion alternately generating a positive pressure and a negative pressure; a first diaphragm which is provided on one side of the pumping portion and of which a shape is changed as the positive pressure and the negative pressure are alternately generated; a transport chamber which sucks and discharges a transport target fluid corresponding to the deformation of the first diaphragm; a second diaphragm which is provided on the other side of the pumping portion; a monitoring chamber which is provided on one side of the second diaphragm and of which a pressure changes corresponding to the deformation of the second diaphragm; and a pressure measuring portion measuring a pressure change of the monitoring chamber.

A wearable infusion pump assembly. The wearable infusion pump assembly includes a reservoir for receiving an infusible fluid and a fluid delivery system configured to deliver the infusible fluid from the reservoir to an external infusion set. The fluid delivery system includes a controller, a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the external infusion set, the pump assembly comprising a pump plunger, the pump plunger having distance of travel, the distance of travel having a starting position and an ending position, at least one optical sensor assembly for sensing the starting position and ending position of the pump plunger distance of travel and sending sensor output to the controller, and a first valve assembly configured to selectively isolate the pump assembly from the reservoir, wherein the controller receives the sensor output and determines the total displacement of the pump plunger.

Delivery systems and their methods of use for delivering one or more therapeutic compounds to a user are described. A delivery system may include an implantable pump and an external actuator. The implantable pump may include an actuatable portion that may be actuated to dispense a volume of fluid. The external actuator may include a pusher configured to deform skin to engage an actuatable portion of the pump. The external actuator may also include a positioning magnet configured to magnetically attract a portion of the implantable pump such that the external actuator and the pump may be aligned prior to applying force to the portion of the skin between the external actuator and the actuatable portion of the pump.

A catheter assembly may include a catheter, a catheter hub coupled to the catheter, an injection port on the catheter hub, and an injection port backflow control device. The backflow control device may include a concentric port, a bellow, and a duckbill valve. The injection port backflow control device may include a split septum and a duckbill valve. The injection port backflow control device may include a deformable annular valve disposed around an inner surface of the catheter hub and may block an opening in the catheter hub connected to the injection port. The injection port may receive a needleless syringe for administration of medicine or other fluids. The injection port backflow control device may permit fluids to flow into the catheter hub and may prevent fluids from flowing out of the catheter hub through the injection port.