US4570634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shockwave reflector
Assignee: Dornier Medizintechnik GmbH
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Filing: 1983-10-25
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Granted: 1986-02-18
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Expires: 2003-10-25
Abstract
Abstract A reflector for focusing shockwaves in order to contactlessly comminute concretions in living bodies and for which a suitable selection of materials and geometry prevents a transverse wave in the reflector material from leading the shockwave front in the coupling medium.
Inventors
- 👤 Othmar Wess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:18
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
60 words
In a reflector for focusing, shockwaves in a coupling liquid in order to contactlessly comminute concretions in living bodies, the improvement comprising interior reflecting surface means in which the speed of propagation c TO of a transverse surface wave in said reflecting surface means is less than the speed of sound c S in the coupling liquid filling the reflector.
Claim 2
Dependent Claim
60 words
In a reflector for focusing, shockwaves in a coupling liquid in order to contactlessly comminute concretions in living bodies, the improvement comprising interior reflecting surface means in which the speed of propagation c TO of a transverse surface wave in said reflecting surface means is less than the speed of sound c S in the coupling liquid filling the reflector.
Claim 3
Dependent Claim
24 words
A reflector according to claim 1, in which the coupling liquid is water and the interior reflecting surface means is lead, tin or tantalum.
Claim 4
Dependent Claim
88 words
In a reflector for focusing shockwaves in a coupling liquid in order to contactlessly comminute concretions in living bodies, the improvement comprising that the interior geometry of the reflector and the reflecting material of the interior reflector surface are in accordance with the following equation: ρ.sub.max >ρ.sub.K =arcsine c.sub.S /c.sub.TO wherein ρ max =maximum possible angle of incidence, ρ K =critical angle, c S =speed of propagation of the shockwave inside the reflector, and c TO =speed of propagation of the transverse surface wave in said reflecting material.
Claim 5
Dependent Claim
88 words
In a reflector for focusing shockwaves in a coupling liquid in order to contactlessly comminute concretions in living bodies, the improvement comprising that the interior geometry of the reflector and the reflecting material of the interior reflector surface are in accordance with the following equation: ρ.sub.max >ρ.sub.K =arcsine c.sub.S /c.sub.TO wherein ρ max =maximum possible angle of incidence, ρ K =critical angle, c S =speed of propagation of the shockwave inside the reflector, and c TO =speed of propagation of the transverse surface wave in said reflecting material.
Claim 6
Dependent Claim
34 words
A reflector according to claim 3, in which the reflector is a partial ellipsoid of which the limit angle ρ max is less than the angle ρ K because of a smaller enclosing angle.
Claim 7
Dependent Claim
22 words
A reflector according to claim 3, in which the ratio of the axes a:b of the reflector body is near to unity.
References Cited (Backward Citations)
US3942531A
Cited
US4311147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |