Negative pressure wound therapy apparatus
First Claim
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1. A pump assembly apparatus for applying negative pressure to a wound, comprising:
- a magnetic circuit comprising;
an upper pole;
a lower pole spaced apart from the upper pole; and
a magnet positioned between at least a portion of the upper pole and the lower pole;
an electrically conductive voice coil, at least a portion of which is disposed between the upper pole and the lower pole, the electrically conductive voice coil being configured to move within at least a portion of the magnetic circuit;
a diaphragm; and
a valve assembly comprising a first valve member and a second valve member, the first valve member having a first inlet opening having a first center axis and a first outlet opening having a second center axis, the second valve member having a second inlet opening having a third center axis and a second outlet opening having a fourth center axis;
wherein the first and fourth center axes are different from one another such that the center of the first inlet opening is offset from the second outlet opening; and
wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil.
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Abstract
Some embodiments disclosed herein are directed to a pump assembly comprising a voice coil, a magnet and a diaphragm, wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil. Some embodiments disclosed herein are directed to an apparatus for applying negative pressure to a wound comprising a source of negative pressure configured to be coupled to a dressing, the source of negative comprising a voice coil actuator and a diaphragm, and a controller configured to produce a drive signal for the voice coil actuator.
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Citations
20 Claims
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1. A pump assembly apparatus for applying negative pressure to a wound, comprising:
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a magnetic circuit comprising; an upper pole; a lower pole spaced apart from the upper pole; and a magnet positioned between at least a portion of the upper pole and the lower pole; an electrically conductive voice coil, at least a portion of which is disposed between the upper pole and the lower pole, the electrically conductive voice coil being configured to move within at least a portion of the magnetic circuit; a diaphragm; and a valve assembly comprising a first valve member and a second valve member, the first valve member having a first inlet opening having a first center axis and a first outlet opening having a second center axis, the second valve member having a second inlet opening having a third center axis and a second outlet opening having a fourth center axis; wherein the first and fourth center axes are different from one another such that the center of the first inlet opening is offset from the second outlet opening; and wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pump assembly apparatus for applying negative pressure to a wound, comprising:
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a magnetic circuit comprising; an upper pole; a lower pole spaced apart from the upper pole; and a magnet positioned between at least a portion of the upper pole and the lower pole; an electrically conductive voice coil, at least a portion of which is disposed between the upper pole and the lower pole, the electrically conductive voice coil being configured to move within at least a portion of the magnetic circuit; a diaphragm; and a valve assembly comprising a first valve member and a second valve member, the first valve member having a first inlet opening having a first center axis and a first outlet opening having a second center axis, the second valve member having a second inlet opening having a third center axis and a second outlet opening having a fourth center axis; wherein the second and third center axes are different from one another such that the center of the first outlet opening is offset from the second inlet opening; and wherein the voice coil is configured to move the diaphragm to pump a fluid through the pump assembly in response to a drive signal applied to the voice coil. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for applying negative pressure to a wound, comprising:
a pump operatively coupled to a dressing and configured to apply negative pressure to the wound via the dressing, comprising; a voice coil actuator comprising; a magnetic circuit comprising an upper pole, a lower pole spaced apart from the upper pole, and a magnet positioned between at least a portion of the upper pole and the lower pole, and a voice coil, at least a portion of which is positioned between the upper pole and the lower pole; a controller configured to produce a drive signal for the voice coil actuator; a diaphragm; and a valve assembly comprising a first valve member and a second valve member, the first valve member having a first inlet opening having a first center axis and a first outlet opening having a second center axis, the second valve member having a second inlet opening having a third center axis and a second outlet opening having a fourth center axis, wherein the first and fourth center axes are different from one another such that the center of the first inlet opening is offset from the second outlet opening, and wherein the second and third center axes are different from one another such that the center of the first outlet opening is offset from the second inlet opening. - View Dependent Claims (20)
Specification