Importance

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Abstract

A peristalic pump includes a frame supporting a rotatable shaft on which is mounted a rotor having at least two rollers mounted thereon for rotation about axes parallel to the shaft axis. A pump housing surrounds the rotor and is formed by a pair of substantially identical body members positioned in facing, abutting relationship. Each body member has an annular portion with a flat axial end surface and an inner circumferential surface, as well as a tube guide and clamp tang portion integral with the annular portion and extending radially outwardly therefrom. Each tube guide and clamp tang portion has a pair of spaced-apart half-round grooves extending to the inner circumferential surface. Each member has a shoulder which extends radially inwardly from one axial end of the annular portion. When the members are assembled in facing, abutting relationship, they define a substantial annular opening for receiving the pump rotor, and the inner circumferential surfaces form a common circumferential surface bounded at each axial end by one or the shoulders. Further, the half-round grooves form a pair of spaced-apart round passageways. Flexible, compressible, hollow tube means are positioned in the passageways and abut the common circumferential surface between the pump housing and the rollers. Additional means selectively lock the tube means with respect to the housing.

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First Claim