Patent ID: 8500421

Claim:
A peristaltic pump, comprising: an exterior casing; a plurality of mating features formed in the exterior easing; an elastomeric member disposed within the exterior casing, the elastomeric member comprising: a plurality of mechanical guide features; and a first annular recess, a second annular recess formed in the exterior casing; and an annular flow path guide formed by the first annular recess and the second annular recess, the annular flow path guide defining an annular flow path, wherein the plurality of mechanical guide features are received into the plurality of mating features, the plurality of mating features and the plurality of mechanical guide features cooperating to prevent relative motion between the elastomeric member and the exterior casing, and wherein the annular flow path guide is configured to engage at least one roller, wherein the at least one roller is operable to move along the annular flow path guide, and pinch the annular flow path creating a positive displacement of fluid contained within the annular flow path.