HYDRAULICALLY ACTUATED PUMP FOR LONG DURATION MEDICAMENT ADMINISTRATION
First Claim
1. A hydraulically actuated fluid delivery system for sustained delivery of a liquid component, comprising:
- a pump chamber, and a fluid storage chamber having an orifice and being functionally connected to said pump chamber by a moveable barrier;
a hydraulic fluid reservoir for storing a high viscosity fluid, said reservoir being connected to said pump chamber via a restrictor capable of controlling the rate of flow of the high viscosity fluid, and,an actuator functionally connected to said hydraulic fluid reservoir to cause said hydraulic fluid to flow into said pump chamber through said restrictor,thereby expanding the 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.
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Accused Products
Abstract
Presently disclosed is a hydraulic pump device and its use thereof, especially in a fluid delivery system. In one embodiment, the fluid delivery system is an inexpensive, single-use device for slow dosing medicament applications. The fluid delivery system may employ a spring-compressed bellows crank or other combination of simple mechanisms operating according to the well-known peristaltic principle to force a volume of ultrapure bio-inert hydraulic fluid through an aperture, thereby expanding one chamber of a two chamber hydraulic cylinder. The second, fluid storage chamber, containing the medicament, is emptied through a conventional orifice in response to the expansion of the pump chamber. The medicament may thence flow through any suitable infusion set into a patient removeably attached thereto.
100 Citations
1 Claim
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1. A hydraulically actuated fluid delivery system for sustained delivery of a liquid component, comprising:
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a pump chamber, and a fluid storage chamber having an orifice and being functionally connected to said pump chamber by a moveable barrier; a hydraulic fluid reservoir for storing a high viscosity fluid, said reservoir being connected to said pump chamber via a restrictor capable of controlling the rate of flow of the high viscosity fluid, and, an actuator functionally connected to said hydraulic fluid reservoir to cause said hydraulic fluid to flow into said pump chamber through said restrictor, thereby expanding the 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.
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Specification