Means and method for the noninvasive fragmentation of body concretions
Patent 4610249 Issued on September 9, 1986. Estimated Expiration Date: 
May 8, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 8, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesApparatus for breaking-up, without contact, concrements present in the body of a living being Apparatus for contact-free disintegration of kidney stones or other calculi Patent #: 4311147 Inventors
AssigneeApplicationNo. 06/608114 filed on 05/08/1984US Classes:601/4Contact-free comminution of concretionExaminersPrimary: Crowder, Clifford D.Attorney, Agent or FirmInternational ClassesA61B 17/22 (20060101)G10K 15/04 (20060101) G10K 15/06 (20060101) A61B 8/08 (20060101) AbstractApparatus and method for noninvasive fragmentation of body concretions. The apparatus has an integral unit including an ultrasonic locating transducer and positioning structure. The concretion is localized with ultrasonics and then shattered upon generation of a shockwave, using a relfector with first and second foci. A spark gap at the first focus generates the shockwave which propagates to the second focus coincident with the concretion. The ultrasonic tranducer is positioned so that an axis of the transducer is coincident with a straight line passing through the first and second foci.Other References
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