US 8,012,158 B2Granted

Device for fragmenting substances

AssigneeKarl Storz GmbH & Co. KG

InventorsKlaus M. Irion, Clemens Rebholz

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Abstract

A device for fragmenting substances comprises a probe having an elongate probe shaft on the distal end of which a probe head is arranged, said probe head comprising an electro-hydraulic converter with which electrical energy, delivered via the probe shaft from the proximal direction, is converted in shock-like manner into mechanical kinetic energy, said converter comprising a housing which accommodates a liquid chamber and a shock-transmitting element which is designed as a piston and which can be moved in the longitudinal direction of the housing from a proximal end position to a distal end position, the distal end position being defined by an abutment on the housing, which abutment is struck by a counter-abutment arranged on the shock-transmitting element. The abutment and the counter-abutment are designed in such a way that, during its movement from the proximal end position to the distal end position, the counter-abutment comes directly into contact with the abutment, and the shock-transmitting element is moved back again to the proximal end position essentially by the impact on the abutment.

Claims25

Dependent claims

A device for fragmenting substances, comprising:

a probe having an elongate probe shaft having a distal end and a proximal end, a probe head arranged at said distal end,
said probe head comprising an electro-hydraulic converter with which electrical energy, delivered via said probe shaft, is converted in shock-like manner into mechanical kinetic energy,
said electro-hydraulic converter having a housing having a longitudinal direction, which accommodates a liquid chamber and a shock-transmitting element designed as a piston and moveable in said longitudinal direction of said housing from a proximal end position into a distal end position,
said probe shaft having at least one delivery line for a liquid extending through the probe shaft and into said liquid chamber of said electro-hydraulic converter,
said distal end position being defined by an abutment on said housing, toward which abutment a counter-abutment runs, which is arranged on said shock-transmitting element,
said abutment and said counter-abutment being designed in such a way that, during a movement of said shock-transmitting element from said proximal end position to said distal end position, said counter-abutment comes directly into contact with said abutment, and said shock-transmitting element is moved back again to said proximal end position essentially by the impact of said counter-abutment on said abutment.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/328,712Filed 10 Jan 2006 · continuation
Priority: DE 103 31 69411 Jul 2003
Published: US 2006/0142754 A129 Jun 2006
Granted: 6 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

A61B 17/22022
In direct contact with, or very close to, the obstruction or concrement: using electric discharge
A61B 2017/922
Impactors or extractors, e.g. for removing intramedullary devices: devices for impaction, impact element
A61B
Medical diagnosis and surgery