Acoustic focussing device

Details Acoustic focussing device Acoustic focussing device

1991-11-22

1993-08-31

Jaworski, Francis

Surgery

Truss

Pad

128 24EL, A61B 800, A61B 1722

Patent

active

052400050

ABSTRACT:
The present invention relates to an acoustic focussing device for the focussing of ultrasonic and shock waves, particularly for the no-contact crushing of a concrement disposed in the body of a living being. Several boundary surfaces are arranged behind one another in the propagating direction of the sound waves, in which case adjacent gaps contain liquids of different sound velocities. At least one gap is connected with a non-adjacent gap. At least one of the boundary surfaces is deformable. At least one of the boundary surfaces can be moved in parallel to the propagating direction of the sound waves by means of which movement liquid is displaced between connected gaps and the radius of curvature of at least one of the deformable boundary surfaces is changed.

REFERENCES:
patent: 4630607 (1986-12-01), Duinker et al.
patent: 4674505 (1987-06-01), Pauli et al.
patent: 4718421 (1988-01-01), Rohwedder et al.
patent: 4823773 (1989-04-01), Naser et al.
patent: 4840166 (1989-06-01), Naser et al.

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