Implantable drug delivery device with peristaltic pump having a bobbin roller assembly
First Claim
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1. An implantable drug infusion device comprising, in combination:
- a pump tube for holding a liquid to be pumped;
a race configured to support the tube along a path;
a roller assembly configured to compress the tube against the race at one or more points along the path, the roller assembly including at least one roller, the roller assembly comprising at least two biasing members operably connected to the roller to adjustably bias the roller against the tube, the two biasing members forming an angle; and
a drive assembly to drive the roller assembly relative to the tube along the path so as to move the liquid through the tube.
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Abstract
An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. At least two biasing members are operably connected to the roller to bias the roller against the tube, the two biasing members forming an angle.
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Citations
40 Claims
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1. An implantable drug infusion device comprising, in combination:
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a pump tube for holding a liquid to be pumped;
a race configured to support the tube along a path;
a roller assembly configured to compress the tube against the race at one or more points along the path, the roller assembly including at least one roller, the roller assembly comprising at least two biasing members operably connected to the roller to adjustably bias the roller against the tube, the two biasing members forming an angle; and
a drive assembly to drive the roller assembly relative to the tube along the path so as to move the liquid through the tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An implantable drug infusion device comprising, in combination:
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a bulkhead having a race;
a pump tube having an inlet and an outlet and being positioned within the race;
a roller assembly configured to compress the tube against the race at one or more points along the path, the roller assembly including at least one roller, the roller assembly comprising at least two biasing members operably connected to the roller to adjustably bias the roller against the tube, the two biasing members forming an angle; and
a drive assembly to drive the roller assembly relative to the tube along the path so as to move a liquid through the tube. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An implantable drug infusion device comprising, in combination:
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a bulkhead having a race, a first chamber, and a second chamber;
a pump tube having an inlet and an outlet and being positioned within the race, the race configured to support the tube along a path;
a motor assembly positioned within the first chamber; and
a pumphead assembly positioned within the second chamber, the motor assembly driving the pumphead assembly, the pumphead assembly comprising a roller assembly having a hub, three roller housings, each roller housing having a roller and being pivotally connected to the hub;
a drive assembly to drive the roller assembly relative to the tube along the path so that the rollers compress the tube to move a liquid through the tube;
the rollers and race defining a gap; and
at least two springs operably connected to each roller housing to bias a corresponding roller against the tube, the two springs forming an angle. - View Dependent Claims (23, 24, 25)
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26. An implantable drug infusion device comprising, in combination:
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a pump tube for holding a liquid to be pumped;
a race configured to support the tube along a path;
a roller assembly configured to compress the tube against the race at one or more points along the path, the roller assembly including at least two rollers and a hub, the roller operably connected to at least one adjacent roller by a biasing member to bias the roller against the tube, wherein the roller, the adjacent roller and the hub form a triangle, and a drive assembly to drive the roller assembly relative to the tube along the path to move the liquid through the tube. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. An implantable drug infusion device comprising, in combination:
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a pump tube for holding a liquid to be pumped;
a race configured to support the tube along a path, the race having a center;
a roller assembly configured to compress the tube against the race at one or more points along the path, the roller assembly including at least two rollers and a hub, the hub having a center, each roller operably and pivotally connected to the hub by a corresponding retracting roller arm and a corresponding biasing member to bias each roller against the tube, wherein the rollers and the hub form a triangle, each corresponding retracting roller arm and corresponding biasing member forming an angle, each roller located at one end of its corresponding retracting roller arm, a drive assembly to drive the roller assembly relative to the tube along the path to move the liquid through the tube, the center of the hub substantially coinciding with the center of the race, the load of the rollers on the tube being substantially uniform. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification