Abstract: A device for exchanging and for preventing the bending of the pushing-in bar (27) having two pivoting arms (15) which are pivotably mounted on a support (9) and can be pivoted by a drive pinion (21). Supporting legs (25) which support the pushing-in bar (27) are fastened to the pivoting levers with the aid of a fastening element (29). One of the fastening elements (29) is fixedly connected to one of the supporting legs (25); the second fastening element (29) carries the pushing-in bar (27) without securing it in the longitudinal direction.

Abstract: A device for exchanging and for preventing the bending of the pushing-in bar (27) having two pivoting arms (15) which are pivotably mounted on a support (9) and can be pivoted by a drive pinion (21). Supporting legs (25) which support the pushing-in bar (27) are fastened to the pivoting levers with the aid of a fastening element (29). One of the fastening elements (29) is fixedly connected to one of the supporting legs (25); the second fastening element (29) carries the pushing-in bar (27) without securing it in the longitudinal direction.

Abstract: An apparatus for separating a relatively low density liquid such as oil from a relatively more dense liquid, e.g. water, substantially immiscible therewith, comprises a vessel in which the two liquids form strata, and a trough in the vessel is provided with a pair of floats. At least one of the floats is internally subdivided into at least a pair of laterally spaced trim chambers interconnected by a tube so that the introduction of compressed air into one chamber displaces trim liquid into the other and causes rotation of the float about an axis parallel to the trough so that the overlying liquid can flow over the edge of the trough into the latter when this edge is canted beneath the liquid surface.