Patent ID: 6645175
Filing Date: 2003-11-11
Classification: A61M

Abstract:
A device in infusing medicinal fluid into a patient at a controlled rate comprising:(a) a housing having outlet passageway; (b) a stored energy means disposed within said housing for forming a fluid reservoir having an inlet and an outlet in communication with said outlet passageway of said housing, said stored energy means comprising at least one generally planar distendable member, said member being distendable as a result of pressure imparted by fluids to establish internal stresses, said stresses tending to move said member toward a less distended configuration; (c) fluid flow control means carried by said housing for controlling the rate of fluid flow from said reservoir toward said outlet passageway of said housing, said fluid flow control means comprising a rate control film rotatably connected to said housing intermediate said reservoir outlet and said outlet passageway, said rate control film having first and second spaced apart porous areas, said film being rotatable from a first position wherein said first porous area is aligned with said outlet of said reservoir and said outlet passageway and a second position wherein said second porous area is aligned with said outlet of said reservoir and said outlet passageway.