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Biopsy needle system having a pressure generating unit
专利权人:
Norbert Heske
发明人:
Norbert Heske,Thomas Heske
申请号:
US12898294
公开号:
US08162851B2
申请日:
2010.10.05
申请国别(地区):
US
年份:
2012
代理人:
摘要:
A biopsy needle system includes a cylinder with an open end and a cylinder wall. A piston is inserted in the open end such that a cylinder interior volume is defined between the piston and the cylinder, the piston being movable in the cylinder. A biopsy needle is connected to the cylinder. A ventilation groove is established in the cylinder wall only to a depth of a portion of a thickness of the cylinder wall. The ventilation groove is positioned such that the cylinder interior volume of the cylinder communicates with the ambient atmosphere when the piston is displaced to a position in the cylinder so as to establish an airflow through the ventilation groove past the piston.
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中国工程科技知识中心
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