Abstract: The invention relates to a pump for discharging hot corrosive liquids, in particular molten salts, consisting of a pump pipe (1), a discharge pipe (2) dipping into the liquid and at least two valves (3, 4), whereby the liquid is discharged periodically by pressurisation.

Abstract: An arrangement for holding a rope or the like has a support, a hook member supported by the support rotatably about an axis and formed as a double hook having two hook arms which are mirror-symmetrical relative to one another, and a releasable locking member arranged for locking the hook member in a holding position. The hook member may have a S-shaped contour in its side view in the direction of axis of rotation. Each hook arm may be provided with an abutment for the locking member, the abutment being arranged at an opposite side relative to a recess for receiving of the rope and the like. The abutment may be formed as a surface which has a cutout in a direction opposite to the direction of the rotation of the hook member.

Abstract: A thrust coupling to be mounted on the bow of a thrust-exerting watercraft has a support on which a hemi-spherical element is mounted for free rotation about an axis extending transverse to the direction of travel of the watercraft. The hemi-spherical element is to be freely turnably received in a vertical guide track on the stern of a watercraft to be pushed; it is composed of two hemi-spherical members whose flat sides are juxtaposed but spaced from one another. The outer surface of each member may carry a removable layer of high-friction material.