Abstract: Expansion seal ring with an essentially torus shaped expansion seal (1) which is provided between two concentric positionable connection pieces (2, 3) to be sealed or the like, which include a sealing section (1a) which is pulled over the edge (3a) of one of the two connection pieces (3), and which includes an expandable section (1b), which is provided to be radially effective between the two connection pieces (2, 3), as well as a jacket (4) which essentially completely covers or envelopes the expansion seal (1) at least in the area of the expandable section (1b).

Abstract: Emptying device for bulk material container (1) with a discharge funnel (2) and a conically shaped closing part (3), which is axially displaceable in an encapsulated guide cylinder (16). The closing part (3) is held against the inner wall of a discharge funnel (2) under pressure by the working of a return spring (40). The return spring (40) is integrated in the internal space (17) of the guide cylinder (16) and is directed against a pressure plate (22) mounted axially slideably within the guide cylinder (16). The pressure disk (22) is provided with a pressure rod (24), which axially transcends the guide cylinder (16) in the manner of a piston rod and projects upwardly. For raising the pressure disk (22) to the discharge position the pressure disk is acted upon by a lifting device, which according to a preferred embodiment is likewise completely encapsulated, wherein the necessary supply media for the operation is delivered via the lift device (7) supporting struts.