Cassette with free flow prevention override for infusion pump

An ambulatory pump system comprising:

• a cassette including a free flow prevention clamp, a housing, and an actuator assembly,
• the free flow prevention clamp including a clamping section having a first side and a second side, a first elongate section extending from the first side, and a second elongate section extending from the second side,
• the housing supporting the free flow prevention clamp and defining a channel for receiving a tube, the first elongate section and the second elongate section extending parallel to the channel and the clamping section extending across the channel,
• wherein the free flow prevention clamp is configurable within the housing in an open condition that allows fluid flow through the tube when force is applied to a portion of the clamping section and in a closed condition that prevents fluid flow through the tube when the force is removed from the portion of the clamping section;
• the actuator assembly including a portion extending through the housing and configurable for movement between a rest position and a bypass position;
• and
• a pump body including a receptacle configured to receive the cassette, a peristaltic pump positioned adjacent the receptacle to act on the tube when the cassette is received by the receptacle, at least one cam positioned at least partially within the cassette to engage at least one of the first and second elongate sections to apply the force when the cassette is received by the receptacle.