Patent US4655220A successfully refreshed from Google Patents.
US4655220A
Expired / Lapsed
US
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Apparatus for contactless fragmentation of concrements in vivo
Assignee: Siemens AG
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Filing: 1985-01-24
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Granted: 1987-04-07
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Expires: 2005-01-24
Abstract
Abstract The invention relates to an apparatus for the contactless fragmentation of a concrement present in the body of a living being. A shock wave generator is aimed at a target region in the body and includes a coil having the form of a spherical segment. In front of the coil is arranged a mating radiator element, which closes off a liquid filled space and generates therein a shock wave focused on the centers of curvature of the coil and element upon brief connection of the coil to a high voltage. The concrement to be fragmented is positioned to lie at these centers of curvature.
Inventors
- 👤 Alfred Hahn
- 👤 George Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:18
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
Shock wave generator apparatus for fragmenting concretions in vivo, comprising: a radiator element bounding a liquid-filled volume and shaped as a spherical segment which is smaller than a hemisphere and which faces concave forward into said volume, the volume being large enough to receive a concretion to be destroyed; and a coil located behind the radiator element and shaped as a spherical segment which is smaller than a hemisphere and which faces concave forward to conform with the radiator element, the coil and radiator element being so coupled together that when the coil is briefly energized by a high voltage, the radiator element generates a shock wave in said liquid.
Claim 2
Dependent Claim
110 words
Shock wave generator apparatus for fragmenting concretions in vivo, comprising: a radiator element bounding a liquid-filled volume and shaped as a spherical segment which is smaller than a hemisphere and which faces concave forward into said volume, the volume being large enough to receive a concretion to be destroyed; and a coil located behind the radiator element and shaped as a spherical segment which is smaller than a hemisphere and which faces concave forward to conform with the radiator element, the coil and radiator element being so coupled together that when the coil is briefly energized by a high voltage, the radiator element generates a shock wave in said liquid.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1, wherein the radiator element and coil are positioned such as to have a common focus which is at their respective centers of curvature.
References Cited (Backward Citations)
DE3312014A1
Cited
GB2140693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |