Peristaltic pumps

摘要

A peristaltic pump mechanism comprises a base plate (11) having a generally planar surface for supporting a pump tube (12) to extend at least partially around a circular path defined on said surface, an operating section (10) connectable to the base member (11). At least one rotatable pumping element (21) is mounted on the operating section (10) locally to compress the pump tube (12) and roll around the circular path when the operating section (10) is connected to the base member. A power drive causes the pumping element (21) to roll around the circular path, the pumping element (21) being of conical shape and mounted on the operating section (10) so that the axis of the element is substantially co-incident with the centre of the circular path. In this way essentially no slippage takes place between the conical surface of the pumping element and the planar surface of the base plate.