Patent ID: 7361162

Claim:
A medicinal syringe comprising: a cylindrical syringe barrel ( 1 ) made of glass or plastic, said cylindrical syringe barrel including a syringe head ( 1 a ) at one end of the cylindrical syringe barrel and a grip plate ( 4 ) at another open end of the syringe barrel, said another open end being remote from said one end of the cylindrical syringe barrel, said syringe head ( 1 a ) having a Luer connection cone or a hollow syringe needle integratable therein, said grip plate ( 4 ) being formed as a small strip with a width and a length; an elastomeric piston stopper ( 6 ) and a piston rod ( 7 ), said piston stopper being insertable in the cylindrical syringe barrel ( 1 ) and provided with a threaded blind hole ( 8 ) for screw connection with said piston rod, said piston rod having a cruciform cross-section; and a plastic part ( 2 ) fitting with said grip plate ( 4 ) at said open end remote from said syringe head ( 1 a ), said plastic part ( 2 ) comprising a retaining section ( 2 a ), a hood-shaped section ( 2 b ) that fits on said grip plate ( 4 ), and two one-piece snap catches ( 3 ) on opposite long sides of the hood-shaped section ( 2 b ) and in one piece therewith; in which said retaining section ( 2 a ) is provided with a through-going central passage having a cylindrical inner surface ( 2 i ), said hood-shaped section ( 2 b ) fits on said grip plate ( 4 ) so that said hood-shaped section ( 2 b ) protrudes and extends laterally and outwardly beyond said grip plate ( 4 ) to form an enlarged finger support together with said grip plate ( 4 ), said enlarged finger support having a length (I) that is larger than said length of said grip plate ( 4 ); so that, when said plastic part ( 2 ) is placed on said grip plate ( 4 ), said retaining section ( 2 a ) extends from said open end remote from said syringe head ( 1 a ) toward said syringe head with said cylindrical inner surface ( 2 i ) bearing on an outer surface ( 1 o ) of the cylindrical syringe barrel ( 1 ) and said snap catches ( 3 ) engage over straight sides of said grip plate ( 4 ) and snap on an inner side of the syringe barrel ( 1 ); whereby said plastic part ( 2 ) prevents unintended withdrawal of the piston stopper and rotation of the piston rod through an angle of more than 90° while at the same time providing the enlarged finger support.