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A linear peristaltic pump, and a disposable casette therefor, particularly suitable for the infusion of parenteral fluids. The pump includes a housing having a power-driven shaft and a series of small bearing assemblies having their inner members eccentrically mounted upon that shaft. A thin elastom

A linear peristaltic pump, and a disposable casette therefor, particularly suitable for the infusion of parenteral fluids. The pump includes a housing having a power-driven shaft and a series of small bearing assemblies having their inner members eccentrically mounted upon that shaft. A thin elastomeric membrane extends along the series of bearing assemblies for engagement with the outer members thereof along a first band or linear zone of contact lying in the same plane as the axis of the shaft. The disposable casette is removably supported by the housing and takes the form of a rigid, planar, perimetric frame having an opening across which is stretched a section of elastomeric tubing. Locators provided by the housing and frame orient the casette with the axis of the tubing in the same plane as the first band of contact and the axis of the shaft, and a platen provided by the housing engages the section of elastomeric tubing that bridges the opening of the frame to urge that section into engagement with the opposite side of the membrane along a second band or linear zone of contact parallel with the first band of contact. The casette may include tubular extensions and connectors for connecting opposite ends of the section of elastomeric tubing to a source of fluid and to a patient.

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A linear peristaltic pump apparatus comprising a housing having an opening therein; a shaft rotatably supported within said housing adjacent said opening; means for rotating said shaft; a series of bearing assemblies within said housing each having concentric inner and outer bearing members; said in

A linear peristaltic pump apparatus comprising a housing having an opening therein; a shaft rotatably supported within said housing adjacent said opening; means for rotating said shaft; a series of bearing assemblies within said housing each having concentric inner and outer bearing members; said inner member being eccentrically mounted upon said shaft with the centers of said inner members being arranged to describe a helix about the axis of said shaft; an elastomeric membrane secured to said housing about said opening and covering said opening; said membrane extending along and tangentially engaging the outer members of said bearing assemblies along a first linear zone of contact; a casette removably and externally supported by said housing adjacent to said membrane and comprising a rigid frame and a generally straight section of elastomeric tubing supported thereby; means provided by said housing for orienting said frame with said section of tubing lying in the same plane as said first zone of contact; and platen means provided by said housing and engagable with said section of elastomeric tubing to urge the same into engagement with the opposite side of said membrane along a second linear zone of contact parallel with said first zone of contact.