ROTATIONAL DEVICE WITH ECCENTRIC ABRASIVE ELEMENT AND METHOD OF USE
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Accused Products
Abstract
A rotational device for removing an occlusion from inside a tubular structure, the device comprising a drive shaft for insertion over a guidewire into a tubular structure and an abrasive element on the drive shaft having its centre of mass offset from a longitudinal axis of the drive shaft. A solid counterweight is disposed on the drive shaft spaced from the abrasive element and having its centre of mass offset from the longitudinal axis of the drive shaft so that the abrasive element moves in an orbital path around said axis to abrade an occlusion from inside the tubular structure when the drive shaft rotates around the guidewire.
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Citations
17 Claims
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1-15. -15. (canceled)
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16. A rotational device, comprising:
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a flexible drive shaft having a longitudinal axis and a distal end section formed from at least one helically wound wire and comprising a flange formed on the distal end section; an abrasive element attached to the distal end section, the abrasive element having a center of mass, the center of mass of the abrasive element being offset from the longitudinal axis in a longitudinal plane; and a counterweight attached to the distal end section of the flexible drive shaft at a point that is distal to the abrasive element, the counterweight having a center mass, the center of mass of the counterweight being offset from the longitudinal axis in substantially the same longitudinal plane as the center of mass offset of the abrasive element and separated from the center of mass offset of the abrasive element by an angle of 180 degrees around the axis of the drive shaft, the counterweight further comprising an internal bore having a shoulder, the shoulder securing with the flange formed on the distal end of the drive shaft.
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17. A rotational device, comprising:
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a flexible drive shaft having a longitudinal axis and a distal end section formed from at least one helically wound wire; an abrasive element attached to the distal end section, the abrasive element having a center of mass, the center of mass of the abrasive element being offset from the longitudinal axis in a longitudinal plane; and a distal counterweight attached to the distal end section of the flexible drive shaft at a point that is distal to the abrasive element; and a proximal counterweight attached to the flexible drive shaft at a point that is proximal to the abrasive element.
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Specification