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US 6,425,897 B2Granted
Pistol for the pressing out of bone cement with an attachable cement syringe
AssigneeSulzer Orthopedics Inc.
InventorsTom Overes, Francisco Faoro
Life of this patent
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AssigneeSulzer Orthopedics Inc.
InventorsTom Overes, Francisco Faoro
Estimating the term…
A pistol for the pressing out of bone cement (1) comprises an attachable cement syringe (2) which has a cylinder (3) with an ejection piston (4) and a narrower neck (5) which adjoins at the cylinder (3), with a displacer bar (6) being insertable into the pistol in order to additionally eject residual cement with a second advance mechanism (8). A first piston (9) acts via a piston rod (7) on the ejection piston (4). A second piston (11), which is displaceably journalled in the piston rod (7) and can be activated independently of the first piston, acts on the displacer bar (6). A fluid (10) which is under pressure is controlled via a control device (12) in such a manner that the displacer bar (6) moves relative to the first piston (9) only when the latter has reached a predetermined end position.
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;
Pistol for dispensing bone cement from a syringe which is attachable to the pistol and has a cylindrical portion terminating in a reduced cross-section neck through which fluid can be ejected and an ejection piston that is movable in the cylinder, the pistol comprising a first piston coupled to a tubular bar having a free end engageable with the ejection piston;
Pistol for use with a syringe having a cylinder terminating in a reduced cross-section neck through which fluid can be ejected and an ejection piston including a central, axially oriented, closable through aperture and being movably disposed in the cylinder of the syringe, the pistol comprising a housing and a telescopic actuator for reciprocating the ejection piston in the syringe and forcing fluid through the neck out of the syringe, the telescopic actuator comprising a first piston coupled to a tubular piston rod and reciprocably arranged in the pistol housing, a forward end of the tubular piston rod being engageable with the ejection piston for moving the ejection piston towards the neck of the syringe, a second piston coupled to a second piston rod axially movably arranged within the tubular piston rod, the second piston rod being extendable through the aperture in the ejection piston for movement toward and into the neck of the syringe;
Dependencies are inferred from the claim text.