초록 ▼

An apparatus comprising a compact, portable peristaltic pump particularly suitable for medical use in infusing or removing fluids. The pump includes a series of small bearing assemblies each having concentric inner and outer members capable of free rotation with respect to each other. The inner memb

An apparatus comprising a compact, portable peristaltic pump particularly suitable for medical use in infusing or removing fluids. The pump includes a series of small bearing assemblies each having concentric inner and outer members capable of free rotation with respect to each other. The inner members are eccentrically mounted upon a power-driven shaft with their centers arranged in a helix about the axis of the shaft. A thin elastomeric membrane is disposed along the series of bearing assemblies with the outer members having their surfaces tangentially engaging one side of the membrane along a first band or linear zone of contact. An elastomeric tube extends along the opposite side of the membrane, engaging that membrane along a second band or linear zone of contact directly opposite the first band of contact. A platen supports the tube so that the membrane is in constant engagement with the tube along the second band of contact, and is in either constant or periodically-interrupted engagement with the bearing assemblies along the first band of contact, during pumping operation. The disclosure also sets forth embodiments in which the membrane is preferentially reinforced and in which the apparatus includes a fluid container and a suitable patient connector for administering or removing parenteral and biological fluids.

대표청구항 ▼

A peristaltic pump apparatus comprising a series of bearing assemblies each having concentric inner and outer bearing members freely rotatable with respect to each other; a drive shaft; said inner members of said bearing assemblies being eccentrically mounted upon said drive shaft with the centers o

A peristaltic pump apparatus comprising a series of bearing assemblies each having concentric inner and outer bearing members freely rotatable with respect to each other; a drive shaft; said inner members of said bearing assemblies being eccentrically mounted upon said drive shaft with the centers of said inner members being equidistant from the axis of said drive shaft and spaced uniform angular distances thereabout to describe a helix about said axis; journal means rotatably supporting said drive shaft; power means for rotating said drive shaft; an elastomeric membrane alongside said series of bearing assemblies; means supporting said membrane for tangential engagement with said outer members along a first band of contact on one side of said membrane; a straight, elongated elastomeric tube extending along and engaging the opposite side of said membrane along a second band of contact directly opposite from said first band of contact; and platen means for supporting said tube with the longitudinal axis thereof in spaced parallel relation with respect to the rotational axis of said drive shaft and in engagement with said membrane along said second band of contact; that portion of said first band of contact associated with each outer member oscillating from side to side in relation to said longitudinal axis of said tube when said apparatus is in operation.