Disclosed is a fluid dispensing device that includes at least one reservoir to hold the therapeutic fluid, at least one other unit requiring communication with ambient air, at least partly, to operate, and at least one housing defining an interior to retain the at least one reservoir and the at least one other unit. The at least one housing has at least one vent port formed on one or more of its walls. The at least one vent port is adapted to direct or communicate air to maintain pressure equilibrium between the air pressure in the interior of the at least one housing and the ambient air pressure outside the at least one housing, and provide communication with the ambient air to the at least one other unit requiring air to enable operation of the at least one other unit.

The present application provides a self-powered drug-delivery device. The device includes a chamber having a wall. The chamber contains a fluid and is in connection with an administration means. The device also includes a displacement-generating battery cell. The device further includes an electrically-controlled battery unit, which includes the displacement-generating battery cell coupled to the chamber by a coupling means. The displacement-generating battery cell includes an element that changes shape as a result of charge or discharge of the battery cell so as to cause a displacement within the battery unit. The arrangement of the battery unit, the coupling means, the wall, the chamber, and the administration means is such that the displacement derived from the battery unit is conveyed by the coupling means to cause displacement of the wall of the chamber such that the fluid is expelled from the chamber to force a drug towards the administration means.

Fluid delivery and measurement systems and methods are disclosed.

Processes and devices for delivering a fluid by chemical reaction are disclosed. A chemical reaction is initiated in a reaction chamber to produce a gas, and the gas acts upon a piston to deliver the fluid. An exemplary device may include an upper chamber, a lower chamber, a fluid chamber, a piston between the lower chamber and the fluid chamber, and a one-way valve between the upper chamber and the lower chamber.

A medicament delivery device, which comprises a driving mechanism and a housing (1) having a reservoir (2), which is at least partly filled with a substance and which is sealed at least on one side with a flexible wall (21). The driving mechanism is adapted to press a piston (23) against the flexible wall (21) thereby releasing the substance from the reservoir (2) through an opening (25) in the reservoir (2). This provides for a safe and reliable medicament delivery device.

Provided is an electroosmotic pump including: a housing having a shaft hole; a shaft passing through the shaft hole, arranged to extend inside and outside the housing, and capable of a reciprocating motion in an extension direction thereof; and a moving member coupled to the shaft outside the housing. The shaft may be press-fittable into the moving member.

Embodiments include a displacement-generating battery cell for driving a drug-delivery device. The cell includes at least one volume-changing element. The cell also includes a housing formed according to a concertina-shaped design with folds in the walls thereof and containing an internal chemical reaction system. The arrangement of the chemical reaction system is such that as the cell is discharged, the volume-changing element expands, thereby lengthening the battery and thus reducing the extent of said folds, such that the cell becomes taller to reflect the expansion of the volume-changing component.

Disclosed is a fluid dispensing device that includes at least one reservoir to hold the therapeutic fluid, at least one other unit requiring communication with ambient air, at least partly, to operate, and at least one housing defining an interior to retain the at least one reservoir and the at least one other unit. The at least one housing has at least one vent port formed on one or more of its walls. The at least one vent port is adapted to direct or communicate air to maintain pressure equilibrium between the air pressure in the interior of the at least one housing and the ambient air pressure outside the at least one housing, and provide communication with the ambient air to the at least one other unit requiring air to enable operation of the at least one other unit.

Fluid delivery and measurement systems and methods are disclosed.

Self-regulating electrolytic gas generator and implant system including the same. In one embodiment, the electrolytic gas generator is a water electrolyzer and includes a polymer electrolyte membrane with an anode on one side and a cathode on the other side. Anode and cathode seals surround the peripheries of the anode and cathode and include inlets for water and outlets for oxygen and hydrogen, respectively. A cathode current collector is placed in contact with the cathode, and an anode current collector, which may be an elastic, electrically-conductive diaphragm, is positioned proximate to the anode. The anode current collector is reversibly deformable between a first state in which it is in direct physical and electrical contact with the anode and a second state in which it distends, due to gas pressure generated at the anode, so that it is not in physical or electrical contact with the anode, causing electrolysis to cease.