The present invention discloses a path-type liquid medicine delivery electro-osmosis pump that can be applied to a wearable medicine device. An electro osmosis pump according to the present invention includes: a connector provided with a liquid medicine inlet and a liquid medicine outlet; a check valve assembly combined to one side of the connector; and a driver that is connected to the other side of the connector and moves the liquid medicine toward the liquid medicine outlet by applying pressure to the liquid medicine while being separated from the liquid medicine, which passes through the check valve assembly.

A syringe for a fluid delivery system includes a pressure jacket having a distal end, a proximal end, and a throughbore therebetween. The syringe further includes a rolling diaphragm having a proximal end with an end wall for engaging a plunger, a distal end received within the throughbore of the pressure jacket. The distal end of the rolling diaphragm has a nozzle and a sidewall extending between the proximal end and the distal end of the rolling diaphragm along a longitudinal axis. At least a portion of one of the sidewall and the end wall has non-uniform thickness. At least a portion of the sidewall is flexible and rolls upon itself when acted upon by the plunger such that an outer surface of the sidewall at a folding region is folded in a radially inward direction as the plunger is advanced from the proximal end to the distal end of the rolling diaphragm.

An at least partly implantable system for injecting a substance into the body of a patient is disclosed. The system comprises at least one infusion needle disposed at least partly within at least one housing with a tip end of the infusion needle arranged for penetrating an outer wall of the housing. The system further comprises at least one drive unit adapted to be implanted inside the body and a for advancing and retracting the tip end of the infusion needle so that the infusion needle penetrates, upon advancement, the outer wall to allow for injection of the substance.

An apparatus for personal health maintenance has a sensor attached at least indirectly to a carrier member in turn attachable to a user or subject and configured for measurement of at least one physiological parameter of the user. A reservoir contains a preselected composition. An electronic processor is operatively connected to the sensor for receiving a signal therefrom encoding a measurement of the physiological parameter, the processor being configured for determining a divergence of the physiological parameter from a predetermined magnitude, the processor being operatively connected to a dispensing mechanism for ejecting, from the reservoir, an amount of the composition to be administered to the user to reduce divergence of the physiological parameter from the predetermined magnitude. The dispensing mechanism includes an expandable polymer composite layer with gas-filled micro-bubbles or microspheres expandable by operation of a heating element.

A controller controls a fluid pump to deliver primary fluid from a first source at a desired rate through a respective conduit to a recipient. The controller monitors a volume of the primary fluid injected into the conduit. Subsequent to injecting a predetermined amount of the primary fluid into the conduit, the controller i) discontinues injection of the primary fluid into the conduit and ii) injects a secondary fluid through the conduit to advance a remaining portion of the primary fluid in the conduit to the recipient. The controller advances the secondary fluid into the conduit until a desired amount of the primary fluid is delivered trough the conduit to the recipient. Injection of the secondary fluid to push the remaining portion of the primary fluid reduces waste associated with the primary fluid.

A dual active valve positive displacement pump comprising: A housing holding the pump's components. A piston with an internal cavity divided into two fluidly-isolated volumes by a freely-moving diaphragm, one of the two volumes being fluidly connected with a volume between piston and housing which contains driver pressure from a pressure source. The piston is reciprocally movable inside the housing under positive or negative driver pressure. An active inlet valve operable by driver pressure actuates when the driver pressure is more than the maximum pressure at the pump inlet port. An active outlet valve operable by driver pressure actuates when the driver pressure is less than the minimum pressure at the pump outlet port. The diaphragm separates pumped fluid from operational fluid used to move the diaphragm inside the piston cavity and transmits pressure at the inlet port when the inlet valve is open, and at the outlet port when the outlet valve is open.

A substance delivery device is disclosed. The substance delivery device includes a lever that includes a drive arm that is rotatable about a pivot. The substance delivery device also includes a pump that has a deformable chamber. The deformable chamber is configured to rotate the drive arm about the pivot towards a container so as to deform the container to drive a fluid substance from the container.

The present invention concerns a medical pump comprising: a. A hard housing comprising a top (24) and bottom (1) hard shells, within which a rigid wall (3) and a movable membrane (2) create three distinct chambers; wherein i. said movable membrane tightly separates said second (29) and third (22) chambers ii. said first and third chambers have a watertight interface iii. said second chamber (29) is designed to contain a fluid iv. said first chamber (23) comprises a first venting mean (20) which is arranged to provide a fluidic communication between said first chamber (23) and the external environment; v. said third chamber (22) comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber (22) and the external environment b. A pumping element (4) located in the first chamber (23) c. A least one pressure sensor which measure the pressure gradient between the first chamber (23) and the second chamber (29) d. A fluid pathway which permits: i. a first fluid connection (27) between said second chamber (29) and said pumping element ii. a second fluid connection (28) between said pumping element and a patient line (30).

Embodiments of the present invention relate to the field of pressurized fluid delivery devices for use in medical procedures. In particular, a fluid delivery pump comprises at least one compressive member configured to apply a force to a fluid reservoir. The at least one compressive member is associated with a flexible envelope, such that the flexible envelope may move the compressive member. The flexible envelope may be substantially air-tight so that it may be pressurized. When a negative pressure is created inside the flexible envelope, the flexible envelope may change volume, applying a force to the at least one compressive member. The at least one compressive member may then apply a force to the fluid reservoir and the fluid is forced out of the reservoir.

A drug delivery device includes a housing releasably coupled with a patient, a pressure chamber disposed in the housing and including a vent, a container at least partially disposed in the pressure chamber for storing a drug connectable in fluid communication with a fluid conduit, an activation mechanism, and a relief mechanism. The activation mechanism releases a pressurized drive fluid into the pressure chamber for expelling the drug from the container into the fluid conduit. The relief mechanism is operably coupled to the fluid conduit and is adapted to open the vent to release the drive fluid from the pressure chamber in response to a predetermined condition.