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.
191 Citations
40 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A hydraulically actuated pump system comprising:
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(1) a pump chamber functionally connected to a moveable barrier;
(2) a hydraulic fluid reservoir for storing a high viscosity fluid, said reservoir being connected to said pump chamber via an aperture less than 3 μ
m in diameter, and the largest insoluble particle, if any, in said hydraulic fluid is no more than the size of said aperture; and
,(3) an actuator functionally connected to said hydraulic fluid reservoir to cause said hydraulic fluid to flow into said pump chamber through said aperture, thereby expanding the volume of said pump chamber, displacing said moveable barrier.
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34. A method of administering a medicament, comprising:
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(1) compressing a hydraulic fluid reservoir to force said hydraulic fluid through a connection means;
(2) passing said hydraulic fluid through an adjustable aperture into a pump chamber, wherein said pump chamber is separated from an adjacent fluid storage chamber by a moveable barrier and wherein said fluid storage chamber is filled with a medicament;
(3) displacing said moveable barrier into said fluid storage chamber by filling said pump chamber with said hydraulic fluid, wherein said displacing causes a quantity of said medicament to be expelled from said fluid storage chamber through an output orifice. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification