Patent ID: 7287968

Claim:
A peristaltic hose pump comprising: a roller wheel which can rotate about a roller wheel axis D and which has rollers that are mounted on said roller wheel, wherein said rollers roll along a circular path having a radius R1 with respect to said roller wheel axis D; a pressure arched element with a supporting surface, wherein said supporting surface extends along a circular path defining an extension having a radius R2 around said rotation axis D of said roller wheel; a flexible hose inserted between said supporting surface and said rollers of said roller wheel, said supporting surface being made of an elastically deformable synthetic material, said pressure arched element being pre-shaped such that said extension of said supporting surface, when said pressure arched element is not under tension, essentially corresponds to said extension of said supporting surface when under tension, wherein a fixation device comprises a dowel pin located at an end of said pressure arched element and a closing plate, said closing plate being rotatably mounted around a tension rotation axis running parallel to said rotation axis D of said roller wheel, whereby said closing plate interacts with said dowel pin such that said dowel pin leaves a first snatch post and is pressed into a second snatch post of a clamping disk when said closing plate is turned from a hose mounting position to an operating position.