| 摘要 |
The invention relates to a linear peristaltic pump with fingers comprising a membrane positioned between the pumping fingers (250) and the tube, and to a membrane and fingers for a pump such as this. According to the invention, means are provided to keep that part of the membrane against which the fingers (250) press, which part is called the track (212), in permanent contact with the end of the fingers (250) throughout the duration of the pumping cycle, even in the absence of any tube. In this way it is possible to choose a stronger material for the part known as the track. This material will be more rigid than the rubber conventionally used but, by virtue of the means (220, 260) for maintaining contact, the track will not remain pressed against the tube but will, by contrast, be lifted by the finger (250). It will thus be possible to select a stronger material that will suffer less wear. The precision of the pump will be guaranteed for longer and membrane changes that are painstaking and costly in terms of time and in terms of labour will be avoided. |
