Hydraulically actuated pump for fluid administration

A method of delivering a liquid component to a user using a hydraulically actuated fluid delivery for sustained delivery of the liquid component comprising:

• a pump chamber;
• a fluid storage chamber having an orifice and being functionally connected to said pump chamber by a moveable barrier;
• a first hydraulic fluid reservoir for storing a first, high viscosity, hydraulic fluid, said first hydraulic fluid reservoir being connected to said pump chamber via a restrictor capable of controlling a rate of flow of the first hydraulic fluid;
• a first actuator functionally connected to said first hydraulic fluid reservoir to cause said first hydraulic fluid to flow into said pump chamber through said restrictor, thereby expanding a volume of said pump chamber, displacing said moveable barrier and causing a quantity of said liquid component stored in said fluid storage chamber to be delivered at a sustained rate;
• an adhesive means for affixing the fluid delivery device to the skin of a patient;
• and
• an infusion set for receiving the quantity of the liquid component from the fluid storage chamber, the infusion set including a needle configured to pierce the skin of the patient,
• wherein the infusion set is configured to extend through the adhesive means, and
• wherein said pump chamber and said fluid storage chamber are both within a compartment of the hydraulically actuated fluid delivery device, wherein the compartment is located on the adhesive means,
• wherein the method comprises:
• applying the adhesive means, from the hydraulically actuated fluid delivery device, to a skin of the user to attach the hydraulically actuated fluid delivery device to the skin of the user, the hydraulically actuated fluid delivery device including an infusion set comprising a needle, and locating the adhesive means and the compartment over the skin of the user which is to be pierced using the needle;
• piercing the skin of the user using the needle, from the hydraulically actuated fluid delivery device, which is configured for receiving the quantity of the liquid component from the fluid storage chamber, the infusion set extending through the adhesive means and into the skin of the user;
• and
• actuating the first actuator to cause the quantity of said liquid component stored in the fluid storage chamber to be delivered at a sustained rate through the needle to the user.

A hydraulically actuated fluid delivery device for sustained delivery of a liquid component, comprising:

• a pump chamber;
• a fluid storage chamber having an orifice and being functionally connected to said pump chamber by a moveable barrier;
• a first hydraulic fluid reservoir for storing a first, high viscosity, hydraulic fluid, said first hydraulic fluid reservoir being connected to said pump chamber via a restrictor capable of controlling a rate of flow of the first hydraulic fluid;
• a first actuator functionally connected to said first hydraulic fluid reservoir to cause said first hydraulic fluid to flow into said pump chamber through said restrictor, thereby expanding a volume of said pump chamber, displacing said moveable barrier and causing a quantity of said liquid component stored in said fluid storage chamber to be delivered at a sustained rate;
• an adhesive means for affixing the fluid delivery device to the skin of a patient;
• and
• an infusion set for receiving the quantity of the liquid component from the fluid storage chamber, the infusion set including a needle configured to pierce the skin of the patient,
• wherein the infusion set is configured to extend through the adhesive means, and
• wherein said pump chamber and said fluid storage chamber are both within a compartment, and wherein the compartment is located on the adhesive means.