Patent ID: 8029253

Claim:
A finger-type peristaltic pump comprising: a body, which contains two or more fingers having an extended position and a retracted position; and a housing comprising a passageway having a first hole configured to receive a conduit so that the fingers, when in their extended position, extend into the housing to compress a segment of the conduit in the passageway, wherein the housing comprises an anti-free flow mechanism to prevent a flow of fluid in the segment of the conduit in the passageway when the conduit is not adjacent to the fingers, the anti-free flow mechanism comprising an occluding plate, which has a second hole located adjacent to the first hole, and which is slidable between a non-obstructing position, in which the first and second holes are aligned to permit the flow of fluid in the segment, and an obstructing position, in which the conduit is collapsed between respective edges of the first and second holes, wherein the anti-free flow mechanism has an obstructing state, an unlatched non-obstructing state and a latched non-obstructing state, and wherein closing the housing against the body when the anti-free flow mechanism is in the latched non-obstructing state causes the anti-free flow mechanism to transition to the unlatched non-obstructing state.