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专利名称：Peristaltic pump for pumping a liquid and
method for operating a peristaltic pump
发明人：Sebastien Labarthe,Jean-Baptiste Berthier申请号：US14351593申请日：20121016公开号：US09458846B2公开日：20161004
专利附图：
摘要：A peristaltic pump () for pumping a liquid comprises a flexible tube () for guidingthe liquid to be pumped, a compression means () being actuatable for compressing theflexible tube (), an upstream valve means () arranged in an upstream direction withrespect to the compression means () and being actuatable to selectively open or closethe flexible tube () upstream of the compression means (), and a downstream valvemeans () arranged in a downstream direction with respect to the compression means ()and being actuatable to selectively open or close the flexible tube () downstream of thecompression means (). A drive shaft () is provided which is rotatable for periodicallyactuating the compression means (), the upstream valve means () and the downstream
valve means (). In addition, the peristaltic pump comprises a position detection means ()for detecting the rotational position of the drive shaft () during actuation of the
compression means (), the upstream valve means () and the downstream valve means (), apressure sensor () being arranged between the upstream valve means () and thedownstream valve means () for measuring a pressure signal (P) in the flexible tube () at alocation between the upstream valve means () and the downstream valve means (), and acontrol means () to control the operation of the peristaltic pump (), the control means ()being operative to detect a fault condition during the operation of the peristaltic pump ()from a measured pressure signal (P). In a peristaltic pump () of this kind the controlmeans (), for detecting the fault condition, is operative to detect a peak (P, P′) of thepressure signal (P) in a predefined interval (II) during rotation of the drive shaft () and todetermine whether the fault condition is present or not by taking the signal value at thepeak (P, P′) and the location (T, T′) of the peak (P, P′) in the predefined interval (II) intoaccount. In this way a peristaltic pump is provided allowing for an easy and reliabledetection of a fault condition, in particular for detecting an empty-bag condition
indicating that a bag supplying liquid to the flexible tube of the peristaltic pump is empty.
申请人：Fresenius Vial SAS
地址：Brezins FR
国籍：FR
代理机构：Cook Alex Ltd.
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