Purification procedure nanofiltration of monovalent and polyvalent fresh aqueous solution containing anions and cations

摘要

A spreader bar (1) for a patient lift, comprising the separator bar a safety hook mounted on each extremity of the spreader bar (1), each safety hook comprising: a base member (5) it is an integral part the spreader bar (1) or is attached to the spreader bar (1), a hook member spring-loaded (2) extending in a first plane and having a first end and a second free end, characterized in that the first end is pivotally suspended from the base member (5) at a pivot axis to allow the hook member (2) to move in said first plane of the hook member between an open position and a closed position in which the free end of the hook member engages the base member at an attachment point (15), and whereby the hook member (2) extends from the pivot axis to one side of a second plane which coincides with the pivot axis and the coupling point (15), extending the hook member (2) further through said second plane to its free end.