Patent ID: 8083503

Claim:
A peristaltic pump assembly, comprising: a pump body; a cassette removably attached to the pump body, wherein the cassette includes a race configured to provide a compression surface for a tube supported by the cassette; a roller assembly operatively connected to the pump body to rotate about an axis of rotation, wherein the roller assembly includes a plurality of rollers configured to apply a force to the tube, thereby compressing the tube against the race; and a regulator disposed in the pump body and operatively connected to the cassette, wherein the regulator is configured to regulate the force applied to the tube; wherein the regulator includes: an L-shaped slide member having a first leg and a second leg perpendicular to the first leg, wherein the first leg and the second leg are non-rotatable relative to each other; a pre-loading member, wherein the second leg of the slide member is mounted on the pre-loading member to permit the slide member to move as a unit in a linear direction relative to the pre-loading member; a mounting pin carried by the first leg for rotatably mounting the cassette to the slide member, the mounting pin defining an axis of rotation of the cassette, wherein the mounting pin moves with the slide member in the linear direction; a spring operatively connected to the second leg to apply a force in a direction orthogonal to the axis of rotation defined by the mounting pin.