| 摘要 |
The invention relates to a device for the dosed expelling of a liquid agent, especially for an infusion pump, comprising a receptacle (1) for the storing of the liquid agent and a propulsion mechanism for the propelling of a piston (2) toward an outlet of the receptacle in ord er to expel the agent, characterized in that the propulsion mechanism permanently acts on the pisto n with a propulsive force, a blocking mechanism (9, 11; 9, 16) being provided whereby a piston advance is permanently blocked and, in order to expel the agent, released; the inventio n also relates to an infusion pump for the long-term release of an agent, including a device according to one of the previous claims and a control apparatus that repeatedly releases the blockin g mechanism in order to expel the agent.
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