Linear peristaltic pump with fingers and membrane and finger for such a pump

A membrane for placing between pumping fingers and a tubing of a peristaltic pump, comprising

• a first part, called a track, where pumping fingers of the pump press during operation to move liquid in a pumping direction oriented in a flow direction of liquid in a longitudinal direction of the tubing,
• means for mechanically coupling the track to an end of at least one of the pumping fingers of the pump, wherein the means for mechanically coupling constitute part of means for keeping the ends of the fingers in permanent contact with the track during an entire pumping cycle when the membrane is placed in the peristaltic pump, even in the absence of the tubing,
• wherein the track is attached to a second part of the membrane, called an intermediate membrane element, which is for attaching the membrane to a structure of the pump and which is more flexible than the track,
• wherein at least the means for mechanically coupling the track to the ends of fingers that have two neighbors have a degree of freedom parallel to the pumping direction, so that during a pumping cycle, the track can have reciprocating translational movement, substantially parallel to the pumping direction, with respect to the ends of said fingers.

A membrane for placing between pumping fingers and a tubing of a peristaltic pump, comprising

• a first part, called a track, where pumping fingers of the pump press during operation to move liquid in a pumping direction oriented in a flow direction of liquid in a longitudinal direction of the tubing,
• means for mechanically coupling the track to an end of at least one of the pumping fingers of the pump, wherein the means for mechanically coupling constitute part of means for keeping the ends of the fingers in permanent contact with the track during an entire pumping cycle when the membrane is placed in the peristaltic pump, even in the absence of the tubing,
• wherein the track is attached to a second part of the membrane, called an intermediate membrane element, which is for attaching the membrane to a structure of the pump and which is more flexible than the track,
• wherein the means for mechanically coupling comprise mushroom-shaped elements engageable in slots extending in the pumping direction and placed in the end of one or more pumping fingers.