Abstract: An infuser apparatus for the delivery of fluid at accurate and controlled rates of flow comprising a housing, a deformable member, inlet means and outlet means. Fluid is introduced through the inlet means forcing the deformable member to bend away from its normal position and to generate a pressure force against the fluid introduced. When the outlet means is opened, the fluid is expelled by means of the deformable member returning to its normal position. The infuser apparatus may expel the fluid at either a constant or at a varied and controlled rate depending on the configuration of the deformable member. Further, multiple infusers may be coupled together in a fluid delivery system.

Abstract: An apparatus for delivering fluid with a relatively constant, controlled rate of flow comprises a vacuum power means, a fluid storage means in axial alignment with the vacuum power means and a plunger means carried by the vacuum power means and in axial communication with the fluid storage means. The plunger means is driven by a vacuum which collapses under atmospheric pressure, and as it is driven it effects delivery of the fluid from the fluid storage means.