| 摘要 |
A peristaltic pump for precision metering of small quantities of fluid through a plurality of flow lines has a plurality of flexible liquid transfer tubes disposed between a set of tube rollers and an arcuate backing plate. The tube rollers are mounted on a roller support which is rotated about a central axis and causes the tube rollers to roll successively along the tubes, compressing the tubes against the arcuate surface of the backing plate and causing the fluid contained within the tubes to flow progressively in the direction of roller movement. The tube rollers are individually gear driven and turn at a rate which provides a roller surface speed equal to the rate of movement along the tubes, thereby eliminating any frictional drag along the tubes. The flexible tubes are mounted on the pump housing under uniform controlled tension to assure that each tube dispenses fluid at an equal rate. The tube rollers orbit about and are in positive contact with a inner support roller which provides lateral support to the tube rollers and prevents any radial deflection of the tube rollers under the compressive forces exerted against the flexible tubes.
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