Patent ID: 6425897
Filing Date: 2002-07-30
Classification: A61B,A61F,B05C

Abstract:
Pistol for the pressing out of bone cement, comprising an attachable cement syringe which has a cylinder with an ejection piston and a narrower neck which adjoins at the cylinder, with a displacer bar being insertable into the pistol, which displacer bar can after the ejection of the cylinder content be introduced into the neck through an aperture of the ejection piston by means of a first tubular bar which acts on the ejection piston and which has a second advance mechanism which is journalled in the tubular bar, wherein the tubular bar is designed as a piston rod of a first piston which is individually displaceable by a fluid in the pistol; and wherein the second advance mechanism is individually displaceable by a second piston, which is charged by the fluid and which ejects the displacer bar; with the two pistons being excitable with the fluid, which is under pressure, via a control device in the pistol; whereby the displacements of the two pistons relative to their cylinders are added for one large stroke.