Hydraulically actuated pump for fluid administration
First Claim
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1. A fluid delivery device comprising:
- a hydraulic pump chamber having a rigid sidewall containing and contacting a first amount of a hydraulic fluid and configured to urge a fluid reservoir piston in a fluid reservoir to deliver fluid within the fluid reservoir to a patient;
a first actuator having a first actuator piston;
a first hydraulic reservoir chamber coupled to the first actuator piston and having a second amount of the hydraulic fluid;
a flow restrictor fluidly coupling the first hydraulic reservoir chamber and the hydraulic pump chamber to one another;
a second hydraulic reservoir chamber having a third amount of the hydraulic fluid and fluidly coupled with the hydraulic pump chamber, independent of the first hydraulic reservoir; and
a second actuator operable independently of the first actuator and having a second actuator piston coupled to the second hydraulic reservoir chamber.
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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.
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Citations
14 Claims
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1. A fluid delivery device comprising:
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a hydraulic pump chamber having a rigid sidewall containing and contacting a first amount of a hydraulic fluid and configured to urge a fluid reservoir piston in a fluid reservoir to deliver fluid within the fluid reservoir to a patient; a first actuator having a first actuator piston; a first hydraulic reservoir chamber coupled to the first actuator piston and having a second amount of the hydraulic fluid; a flow restrictor fluidly coupling the first hydraulic reservoir chamber and the hydraulic pump chamber to one another; a second hydraulic reservoir chamber having a third amount of the hydraulic fluid and fluidly coupled with the hydraulic pump chamber, independent of the first hydraulic reservoir; and a second actuator operable independently of the first actuator and having a second actuator piston coupled to the second hydraulic reservoir chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification