Patent ID: 8435212

Claim:
A fluid delivery device, comprising: a reservoir comprising: a first component containing a first portion of said fluid, said component operably linked to a device designed to provide a time-dependent squeezing out force; a second component containing a second portion of said fluid, comprising at least one expandable element made of a resilient material, said second component further operably linked to a sensor system capable of producing at least one output signal associated with at least one geometric parameter of said expandable element, and an outflow passage having a non-zero hydraulic resistance R 2 ; a hydraulic resistor connecting said first and second components; said hydraulic resistor providing predetermined non-zero hydraulic resistance R 1 ; and a programmable processor capable of: (i) acquiring output signals of said sensor system; and (ii) providing an output signal to said device capable of changing over time a force squeezing the fluid out of the first component of said reservoir.