Patent ID: 6062857
Filing Date: 2000-05-16
Classification: A61C,B05C

Abstract:
A manually operated ejector device for a cartridge which is charged with viscous material, comprising: a guide sleeve with a front end adapted to receive a cartridge and a rear end, a piston which is longitudinally displaceable in the guide sleeve for engaging the cartridge, a handle disposed at the rear end of the guide sleeve and a lever which is movable relative to the guide sleeve, wherein the handle engages the piston to longitudinally displace it toward the front end of the guide sleeve, wherein the piston has a spring case and a plunger, the spring case has a chamber with one closed end and another forward end having an opening, a transition between the chamber and the forward end opening including an abutment surface facing the chamber, wherein the plunger has a cylinder guided through the forward end opening and a plunger head at its rear end within the chamber, said plunger head having a larger diameter than the opening, and between the rear end of the plunger head remote from the cylinder and the closed end of the chamber a spring unit compressible in its length parallel to the longitudinal direction of the piston is disposed, the spring travel stroke of the spring unit being at least as great as the distance to which the spring chamber is displaceable in the guide sleeve.