Abstract: A peristaltic pump has a series of inflatable members which serve to sequentially restrict a fluid passage in order to provide the pumping action. The fluid passageway is a closed passage as for example a tube. However in certain applications the principles of this invention may be applicable to an open passage such as a trough. In one embodiment, a series of inflatable toroidal members are mounted on a tube that has a flexible wall. When sequentially inflated, the toroidal members sequentially squeeze the wall into engagement with a centrally disposed mandrel, thusly, providing a peristaltic pumping action.