Rotary axial peristaltic pumps and related methods
First Claim
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1. A peristaltic pump device comprising:
- a platen having a platen surface;
a tube positioned adjacent to the platen surface;
a cam configured for rotation about a rotational axis, said cam having a cam surface that is spaced apart from the platen surface; and
a plurality of fingers, each finger having an occluder nearer the tube, each finger also having (i) a first spring for urging the finger away from the tube and (ii) a longitudinal axis that is substantially parallel to the rotational axis of the cam, said fingers being in engagement with the cam surface such that, as the cam rotates about the rotational axis, the fingers will move axially back and forth, sequentially compressing the tube against the platen surface and thereby causing peristaltic movement of fluid through the tube.
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Abstract
This disclosure concerns rotary axial peristaltic pumps, related methods and components. The rotary axial peristaltic pump generally includes a platen having a platen surface, a tube positioned adjacent to the platen surface, a cam that rotates about a rotational axis and a cam surface that is spaced apart from the platen surface and a plurality of tube compressing fingers. The fingers move axially back and forth in sequence to sequentially compress segments or regions of the tube against the platen surface, thereby causing peristaltic movement of fluid through the tube. The fingers move back and forth on axes that are substantially parallel to the axis about which the cam rotates.
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Citations
32 Claims
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1. A peristaltic pump device comprising:
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a platen having a platen surface; a tube positioned adjacent to the platen surface; a cam configured for rotation about a rotational axis, said cam having a cam surface that is spaced apart from the platen surface; and a plurality of fingers, each finger having an occluder nearer the tube, each finger also having (i) a first spring for urging the finger away from the tube and (ii) a longitudinal axis that is substantially parallel to the rotational axis of the cam, said fingers being in engagement with the cam surface such that, as the cam rotates about the rotational axis, the fingers will move axially back and forth, sequentially compressing the tube against the platen surface and thereby causing peristaltic movement of fluid through the tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A peristaltic pump device comprising:
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a platen having a platen surface; a tube positioned adjacent to the platen surface; a cam configured for rotation about a rotational axis, said cam having a cam surface that is spaced apart from the platen surface; a motor operably connected for driving the cam; and a plurality of fingers, each finger comprising (i) a torsion spring for urging the finger away from the tube and (ii) a longitudinal axis that is substantially parallel to the rotational axis of the cam, said fingers in engagement with the cam surface and configured so that as the cam rotates about the rotational axis, the fingers move axially back and forth, sequentially compressing the tube against the platen surface and thereby causing peristaltic movement of fluid through the tube. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A peristaltic pump device comprising:
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a platen having a platen surface; a tube positioned adjacent to the platen surface; a cam configured for rotation about a rotational axis, said cam having a cam surface that is spaced apart from the platen surface; and a plurality of fingers, each finger comprising (i) a first spring for urging the finger away from the tube and (ii) a longitudinal axis that is substantially parallel to the rotational axis of the cam, each finger in engagement with the cam surface and configured so that as the cam rotates about the rotational axis, the fingers move axially back and forth, sequentially compressing the tube against the platen surface, thereby causing peristaltic movement of fluid through the tube. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A peristaltic pump device, comprising:
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a platen having a platen surface; a tube positioned adjacent to the platen surface; a cam configured for rotation about a rotational axis, said cam having a cam surface that is spaced apart from the platen surface; and a plurality of fingers in engagement with the cam surface, each finger having (i) a first part moveable with respect to a second part and (ii) a longitudinal axis that is substantially parallel to the rotational axis of the cam, and each finger further having a first spring for urging the finger away from the tube and a second spring for urging the first part away from the second part, and configured so that as the cam rotates about the rotational axis, the fingers move axially back and forth, sequentially compressing the tube against the platen surface and thereby causing peristaltic movement of fluid through the tube. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification