FIELD: medical equipment.
SUBSTANCE: invention relates to medical equipment, namely, to injection devices. Device comprises container case and limiter fitted to slide in container case to discharge fluid through the hole in said container case. Wherein, at least, distal part of limiter, which is in contact with fluid medium is made of thermoplastic polyolefin. Wherein limiter also includes, at least, one o-ring retained in, at least, one circumferential groove. Wherein said, at least, one o-ring is made of butyl type rubber and cross section of said, at least, one circular groove of limiter is selected to compress said, at least, one o-ring in axial direction and in radial direction, when said, at least, one o-ring is engaged in circular groove between limiter and internal wall of container case.
EFFECT: invention provides good reliability of sealing ring, thus preventing any deformation, and high accuracy of liquid injection.
17 cl, 6 dwg, 2 tbl
