Abstract: A socket seal for a tubular member defining a socket having an open end delimited by a free edge, an inner wall extending from the free edge and a base remote from the open end, and into the open end of which socket a further member is to be inserted to form a sealed connection, the seal being composed of a sealing ring made of an elastomer material and including a holding portion embedded in the tubular member in the region of the outer edge of the socket, a band-shaped fastening portion joined to the holding portion, and a sealing portion joined to the fastening portion and having a configuration such that it has a greater thickness at a point spaced from the fastening portion than at the location where it is joined to the fastening portion.

Abstract: A piston-cylinder unit includes a cylinder having an inner cylindrical wall face; a pressure piston slidably accommodated in the cylinder and arranged for being driven into the cylinder by an external force. The cylinder defines a cylinder chamber in which pressure is generated by the pressure piston forced into the cylinder. The pressure piston has a radial bottom and a generally cylindrical outer face extending axially away from the piston bottom. In the outer face of the pressure piston, adjacent the bottom, there is provided a circumferential recess which, together with an overlying circumferential portion of the inner cylindrical wall face of the cylinder defines an annular chamber surrounding the pressure piston. The radially measured width of the annular chamber gradually decreases in a direction axially away from the piston bottom. A sealing ring is disposed in the annular chamber and sealingly engages the inner face of the cylinder even when situated in the widest zone of the annular chamber.