Abstract: A device for fixedly interconnecting two parts (1, 2) of a clothes hanger comprising at least one cylinder socket (3) on one part and at least one pin (4) on the other part to be inserted into the socket. The pin (4) has at least one non-cylindrical portion (9) with a radius exceeding the radius of the socket. This portion is flexible in the direction of insertion of the pin for wedging the pin in the socket after insertion.

Abstract: A hydraulic device, such as a hydropneumatic piston accumulator, having a freely displaceable piston which divides the cylinder into a liquid chambers and a gas chamber on opposite sides of the piston. In order to reduce the friction of the piston seals and the heat produced thereby and at the same time guarantee an effective sealing the piston during its initial or terminal movement close to its end position cooperates with a second sealing member at the end wall of the liquid chamber through a first sealing member, and between these sealing members a friction seal is arranged for preventing back flow of liquid from the liquid chamber to the inlet at the end wall but in flow of liquid in the opposite direction in additional the first sealing member is axially displaceable in relation to the piston to a limited extent.