Biopsy needle system having a pressure generating unit
First Claim
Patent Images
1. A biopsy needle system, comprising:
- a cylinder with an open end and a cylinder wall;
a piston 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 connected to the cylinder; and
a ventilation groove established in the cylinder wall only to a depth of a portion of a thickness of the cylinder wall, the ventilation groove being 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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
-
Citations
19 Claims
-
1. A biopsy needle system, comprising:
-
a cylinder with an open end and a cylinder wall; a piston 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 connected to the cylinder; and a ventilation groove established in the cylinder wall only to a depth of a portion of a thickness of the cylinder wall, the ventilation groove being 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. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A biopsy needle system, comprising:
-
a cylinder with a cylinder wall, a cylinder floor and an open end; a piston positioned in the cylinder for movement within the cylinder, the piston having a spindle; a spindle drive mounted to the cylinder, the spindle drive being engaged with the spindle; a ventilation groove formed in the interior of the cylinder wall only to a depth of a portion of a thickness of the cylinder wall, the ventilation groove extending toward the open end of the cylinder, the ventilation groove being configured to provide an airflow bypass of the piston as the piston passes over the ventilation groove; and a biopsy needle coupled to the cylinder, wherein one of a vacuum and an overpressure is communicated to the biopsy needle when the piston is moved by the spindle drive. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A biopsy needle system, comprising:
-
a cylinder with an open end and a cylinder wall; a piston inserted in the open end of the cylinder such that a cylinder interior volume is defined between the piston and the cylinder, the piston being movable in the cylinder; a biopsy needle coupled to the cylinder; a ventilation groove formed in the cylinder wall only to a depth of a portion of a thickness of the cylinder wall, the ventilation groove being positioned such that the cylinder interior volume communicates with the ambient atmosphere when the piston is displaced to a position so as to establish an airflow in the ventilation groove past the piston between the ambient atmosphere and the cylinder interior volume; and an absorbent element carried by the piston, the absorbent element being configured to engage the ventilation groove to receive the airflow. - View Dependent Claims (18, 19)
-
Specification