Patent ID: 7806861

Claim:
Closure piece ( 1 ) for a medical syringe having a syringe barrel ( 3 ) and a syringe neck ( 23 ) connected to a distal end thereof, with an adapter ( 6 ) which can be fitted onto the syringe neck ( 23 ), a screw-type closure piece ( 4 ) which can be fitted onto the adapter ( 6 ), a twist-off ring ( 13 ) connected to the screw-type closure piece ( 4 ), and a closure cap ( 5 ) which can be introduced into the syringe neck ( 23 ), in which the screw-type closure piece ( 4 ) and the twist-off ring ( 13 ) are connected to one another spaced apart by connectors ( 14 ), and first projections ( 16 ) extending to the twist-off ring ( 13 ) are provided on the screw-type closure piece ( 4 ) and second projections ( 17 ) extending to the screw-type closure piece ( 4 ) on the twist-off ring ( 13 ) are provided adjacent to the first projections ( 16 ), and in which the edge ( 18 , 19 ) of a projection ( 16 , 17 ), facing the adjacent projection ( 17 , 16 ), extends substantially in the direction of the longitudinal axis ( 7 ) of the screw-type closure piece ( 4 ) and the edge ( 20 , 21 ) of a projection ( 16 , 17 ), averted from the adjacent projection ( 17 , 16 ), is inclined relative to the longitudinal axis ( 7 ) of the screw-type closure piece ( 4 ).