INFUSION PUMP ACTUATORS, SYSTEM AND METHOD FOR CONTROLLING MEDICAL FLUID FLOWRATE
First Claim
Patent Images
1. An infusion pump comprising:
- an actuator having an output shaft;
a plurality of members in hinged communication with the output shaft, the members in hinged communication with each other, such that the members at an output shaft actuated distance x create flat contact areas with tubing inserted within the members, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and
a logic implementer configured to use a calculated cross-sectional area of the tubing at the output shaft actuated distance x to control the actuator to obtain a desired flowrate.
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Accused Products
Abstract
An infusion pump includes an actuator having an output shaft; a pump actuator having a length lactuator moved by the output shaft and in contact with tubing, such that the pump actuator at an output shaft actuated distance x creates flat contact areas with the tubing, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and a logic implementer configured to use at least two relationships to solve for a same number of variables to calculate a cross-sectional area of the tubing at an output shaft actuated distance x.
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Citations
22 Claims
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1. An infusion pump comprising:
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an actuator having an output shaft; a plurality of members in hinged communication with the output shaft, the members in hinged communication with each other, such that the members at an output shaft actuated distance x create flat contact areas with tubing inserted within the members, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and a logic implementer configured to use a calculated cross-sectional area of the tubing at the output shaft actuated distance x to control the actuator to obtain a desired flowrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infusion pump comprising:
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an actuator having an output shaft; a pump actuator having a length lactuator moved by the output shaft and in contact with tubing, such that the pump actuator at an output shaft actuated distance x creates flat contact areas with the tubing, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and a logic implementer configured to use at least two relationships to solve for a same number of variables to calculate a cross-sectional area of the tubing at an output shaft actuated distance x. - View Dependent Claims (11, 12, 13)
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14. An infusion pump comprising:
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an actuator having an output shaft; first and second members in hinged communication with the output shaft; a third member in hinged communication with the first member; a fourth member in hinged communication with the second member; and the third and fourth members held mechanically such that when the actuator is actuated in a first direction, a tube section extending through the members is compressed to expel fluid from the section and when the actuator is actuated in a second direction, the tube section is decompressed to draw fluid into the section. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification