As the tubular piston, the containment cup, and the filter bi- Al device which possesses the filter, it possesses the formation mannered null longitudinal axis of the filter bi- Al assembly,

摘要

Filter bi- Al and the piston are offered, bi- Al, as the blockade bottom and the open top is had, the hollow tubular piston (10) possesses the cylindrical condition wall which it possesses inside. The piston has the point which is covered the cup (30) by the cup (30), during use, in order that with bi- Al in order to form the liquid dense seal, bi- Al's wall it engages, possesses the basic edge cup seal which extending comes out in outside direction. As the point of the piston has the piston flange, as for the piston flange, the cup forms snap fit in the upper part of the piston flange, at the same time in order extending to come out to the concave section of the piston, extending comes out in outside direction, it is arranged near the concave section. Although the cup, during use, bi- Al and the liquid dense seal are formed, the sufficient, it swells the piston flange, to outside direction. The filter (16), as it is mounted on the bottom of the cup, this it touches with the inner split extending coming out edge of the cup. The filter is kept touching with the edge, in the point of the piston, with the piston backing. Also the cup backing and the support of the filter which is the point of the cup are helped.