Hydraulically actuated pump for fluid administration
First Claim
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1. A fluid delivery device comprising:
- a hydraulic housing having a piston configured to sealingly slide along an inner wall of the hydraulic housing and separate the hydraulic housing into a hydraulic pump chamber and a fluid reservoir, the hydraulic pump chamber having a hydraulic fluid and configured to urge the piston along the inner wall to deliver a fluid in the fluid reservoir to a patient;
a first actuator;
a first hydraulic reservoir chamber having the hydraulic fluid and coupled between the first actuator and the hydraulic pump chamber, the first actuator being configured to urge the hydraulic fluid in the first hydraulic reservoir chamber into the hydraulic pump chamber;
a flow restrictor fluidly coupling the first hydraulic reservoir chamber and the hydraulic pump chamber;
a second hydraulic reservoir chamber having the hydraulic fluid and fluidly coupled with the hydraulic pump chamber; and
a second actuator configured to urge the hydraulic fluid from the second hydraulic reservoir chamber into the hydraulic pump chamber, independent of the first actuator.
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Abstract
A fluid delivery device comprises a hydraulic pump chamber having a hydraulic fluid. A fluid reservoir is coupled to the hydraulic pump chamber and is configured to contain a fluid deliverable to a patient. A first actuator is coupled to the hydraulic pump chamber and is configured to pressurize the hydraulic pump chamber and configured to transfer energy through the hydraulic pump chamber to the fluid reservoir. A second actuator is coupled to the hydraulic pump chamber and is configured to pressurize the hydraulic pump chamber and configured to transfer energy through the hydraulic pump chamber to the fluid reservoir.
817 Citations
17 Claims
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1. A fluid delivery device comprising:
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a hydraulic housing having a piston configured to sealingly slide along an inner wall of the hydraulic housing and separate the hydraulic housing into a hydraulic pump chamber and a fluid reservoir, the hydraulic pump chamber having a hydraulic fluid and configured to urge the piston along the inner wall to deliver a fluid in the fluid reservoir to a patient; a first actuator; a first hydraulic reservoir chamber having the hydraulic fluid and coupled between the first actuator and the hydraulic pump chamber, the first actuator being configured to urge the hydraulic fluid in the first hydraulic reservoir chamber into the hydraulic pump chamber; a flow restrictor fluidly coupling the first hydraulic reservoir chamber and the hydraulic pump chamber; a second hydraulic reservoir chamber having the hydraulic fluid and fluidly coupled with the hydraulic pump chamber; and a second actuator configured to urge the hydraulic fluid from the second hydraulic reservoir chamber into the hydraulic pump chamber, independent of the first actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A fluid delivery device comprising:
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a hydraulic housing having a piston configured to sealingly slide along an inner wall of the hydraulic housing and separate the hydraulic housing into a hydraulic pump chamber and a fluid reservoir, the hydraulic pump chamber having a hydraulic fluid and configured to urge the piston along the inner wall to deliver a fluid in the fluid reservoir to a patient; a first hydraulic reservoir chamber having the hydraulic fluid; a fixed aperture flow restrictor fluidly coupling the first hydraulic reservoir chamber and the hydraulic pump chamber, the fixed aperture flow restrictor configured to control the rate the hydraulic fluid flows between the first hydraulic reservoir chamber and the hydraulic pump chamber; a first actuator coupled to the first hydraulic reservoir chamber and configured to continuously deliver the hydraulic fluid from the first hydraulic reservoir chamber to the hydraulic pump chamber for a period of time; a second hydraulic reservoir chamber fluidly coupled to the hydraulic pump chamber, independent of the first hydraulic reservoir chamber; and a second actuator coupled to the second hydraulic reservoir chamber and operable independent of the first actuator and at discrete intervals during the period of time to periodically deliver the hydraulic fluid from the second hydraulic reservoir chamber to the hydraulic pump chamber independent of and in addition to the continuous delivery of the hydraulic fluid from the first hydraulic reservoir chamber.
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Specification