Clinically usable pump apparatus for a dilatation device
AssigneeSchneider Medintag AG
InventorHans Gleichner
Life of this patent
Estimating the term…
Abstract
A clinically usable pump apparatus for a dilatation device comprising a dilatation catheter, preferably for opening a stenosis and occlusions or for closing vessels, ducts and openings, while using a pumpable medium, which comprises a pump structured to accomplish the double function of producing positive pressure and negative pressure and operatively connected with the dilatation catheter.
Claims2
A clinically usable pump apparatus for a dilatation device having a dilatation catheter, preferably for opening stenoses and occlusions or for closing vessels, ducts and openings, while utilizing a pumpable medium, comprising:
- a pump adapted to be connected with the dilatation catheter for applying controlled positive pressure and negative pressure conditions to the dilatation catheter;
- means for structuring the pump for accomplishing the double function of generating a positive pressure as well as a negative pressure in a closed hydraulic system between the pump and the dilatation catheter;
- mechanical drive means for driving said pump;
- said mechanical drive means comprises:
- a work cylinder;
- a work piston slidably arranged in said cylinder for carrying out forward and return strokes;
- said work piston having opposite faces;
- means for supplying and impinging opposite faces of said work piston with a pressurized medium;
- and
- an excess-pressure valve for preventing that a preselected maximum pressure will be exceeded in the dilatation catheter.
A clinically usable pump apparatus for a dilatation device having a dilatation catheter, preferably for opening stenoses and occlusions or for closing vessels, ducts and openings, while utilizing a pumpable medium, comprising:
- a pump adapted to be connected with the dilatation catheter for applying controlled positive pressure and negative pressure conditions to the dilatation catheter;
- means for structuring the pump for accomplishing the double function of generating a positive pressure as well as a negative pressure in a closed hydraulic system between the pump and the dilatation catheter;
- mechanical drive means for driving said pump;
- said mechanical drive means comprises:
- a work cylinder;
- a work piston slidably arranged in said cylinder for carrying out forward and return strokes;
- said work piston having opposite faces;
- means for supplying and impinging opposite faces of said work piston with a pressurized medium;
- said pump comprising a piston pump having a piston rod;
- said mechanical drive means further including a piston rod provided for the work piston;
- said piston rod of the pump and said piston rod of said mechanical drive means being arranged essentially in alignment with one another;
- means for operatively coupling said piston rod of said pump and said piston rod of said mechanical drive means with one another;
- and
- said coupling means comprising a coupling body having a substantially dovetail-shaped groove provided at one of the piston rods and a fitting element having a cross-section corresponding essentially to said groove attached to the other piston rod.
Dependencies are inferred from the claim text.