Patent ID: 8267280

Claim:
A device for separately storing a substance, such as a pharmaceutical active substance, and a liquid, and for mixing the same prior to discharge, comprising a first receptacle containing the liquid, a second receptacle that contains the substance and has a bottom to be opened so that the substance can pass into the liquid, and comprising a means that can be advanced in order to apply a force to the bottom of the second receptacle such that the bottom is opened, further comprising a tubular insert which is inserted into a neck of the first receptacle, with the front part of a pump means displaceably engaging into the tubular insert and forming the force-exerting means, the front part of the pump means being held by a pump housing part which in the retracted initial position of the pump means defines an air chamber above the tubular insert, that a wall of the pump housing part has formed therein at least one opening through which upon the advance movement of the pump means air escapes outside the first receptacle, and the front part of the pump means being sealed on its outer circumference by an annular seal relative to the tubular insert.