MINIATURE PERISTALTIC PUMP

摘要

The invention concerns a miniature peristaltic pump comprising a rotor (109) provided with three turning rollers (110), a support piece with a rounded portion arranged substantially concentric to said rotor and against which, when operating said rollers are brought to compress a flexible pipe connected to a reservoir of solution to push it outwards and means for automatically compensating positional deviations between the rollers and said support piece. Each roller (110) comprises a substantially cylindrical body (127) and a spindle (126) on which said body is rotatably mounted. The ends of the roller spindles are located in oblong apertures (128) radially recessed in the rotor. The compensating means comprise two springs (129) arranged at the respective ends of said spindles and comprising a central part (130) concentric to the rotor and three curved spring arms (132), one for each roller, with one end connected to said central part and the other end bearing on the corresponding end of a roller spindle to push it outwards and thus enable it to exert a substantially constant force of pressure. The invention is useful for the subcutaneous or intravenous injection of medicinal solutions.