Patent ID: 8297956

Claim:
Peristaltic pumping system comprising: a flexible tube, a substantially cylindrical rotating roller unit containing a series of rollers, each roller having a roller shaft, and the rollers are freely rotating around their roller shafts and are freely moving along a separate radial groove extending radially outward for each roller shaft, a planar element for commonly holding all of the rollers, and the planar element contains the separate radial groove for each roller shaft, a rod-shaped central spreader element which extends along a central axis of the roller unit for pushing the rollers against the flexible tube, and a driving unit comprising a driving coupling element, wherein each of said rollers is made of a single monolithic part comprising the roller shaft having two roller shaft ends, and a lateral wall, wherein the planar element has a retaining and guiding means for said roller shaft ends, said planar element being further adapted to be directly coupled to said coupling element in such a way that the rollers are driven through their roller shaft ends and through said planar element.