Spiral wire bearing for rotating wire drive catheter
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United States of America Patent
Stats
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Aug 18, 1987
Grant Date -
N/A
app pub date -
Jun 19, 1985
filing date -
Jun 19, 1985
priority date (Note) -
Expired
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Abstract
A recanalizing catheter comprising a very small diameter, elongated, flexible tubular member having a distal end at which a tool is mounted for high speed rotation. A flexible drive assembly is located within the tubular member to power the tool. In one embodiment the drive assembly comprises a spiral bearing formed as an elongated cylindrical helix having a central longitudinal passageway extending therethrough, and a flexible drive shaft extending through the passageway and freely rotatable therein. The tool is mounted at the end of the flexible drive shaft. In another embodiment the drive assembly comprises a spiral drive shaft formed of at least one elongated cylindrical helix having a central longitudinal passageway extending therethrough, and an elongated flexible bearing shaft extending through the passageway and about which the spiral shaft can be freely rotated. The tool is mounted at the end of the spiral shaft. In either embodiment the drive shaft and the bearing cooperate with each other to keep the drive shaft centered even as the device is bent through a sharp radia of curvature, while also preventing the shaft from going into critical whirl as it is rotated at a high rate of speed from a remotely located motor.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- KENSEY NASH CORPORATION
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Nash, John | 145 Oak St., Downingtown, PA 19335 | 51 | 10695 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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