Abstract: A sealing device comprises two substantially conical or cylindrical sealing surfaces (6, 8) which are axially introducable one into the other to a substantially concentric sealing position in which the sealing surfaces define between themselves an annular sealing space (12) and further comprising a sealing element (10) consisting of elastic material, the sealing element being compressed in the sealing space between the sealing surfaces and being at least in axial direction bound to a first sealing surface of said sealing surfaces. The second sealing surface (8) is formed with at least one projection (16) and the sealing element forms in cooperation with said first sealing surface at least one pair of portions (20, 22) positioned adjacent each other in the axial direction and presenting different compression resistances under the influence of the projection of the second sealing surface.

Abstract: A sealing device for sealing an annular space between a socket and a spigot end introduced therein comprises a sealing ring (10) and an annular element (12) connected therewith and consisting of a non-elastic cellular plastic, for example styrene cellular plastic. The sealing device is intended to be moulded into the socket at the cylindrical inner surface thereof with the sealing ring (10) positioned adjacent the free end of the socket and the annular cellular plastic element (12) positioned axially inside the sealing ring. The annular element (12) consisting of non-elastic cellular plastic is formed with recesses (22) which are positioned at or in connection with the inner surface of the annular element for allowing a radial expansion of the inner surface of the annular element under the influence of the spigot end introduced into the socket.

Abstract: A sealing element (2) consisting of elastic material is adapted to be molded into for example a concrete pipe socket. In order to improve the binding between the sealing element and the material of the concrete pipe socket the sealing element is at least partially provided with fiber flock (14) at the surface portion which at the molding is adapted to be enclosed by the concrete material of the socket. (FIG.

Abstract: A device in a pipe coupling between a pipe end portion and a wall surrounding the pipe end coupling which is constituted by a socket, consists of a stop face device which is fixable in axial directions in relation to the surrounding wall and engages an end surface of the pipe end portion so as to define the final, fully seated position of the pipe end portion in relation to a surrounding wall of the socket when the pipe end portion is introduced therein. The stop face device becomes inactivatable subsequently to defining the position of the pipe end portion in the surrounding wall.

Abstract: A sealing assembly (1) for a rotary shaft (2), having a metal structure (4) defined by a sleeve portion (6) and by a radially inner flange (7), and a sealing ring (5) cooperating in sliding manner with the shaft (2); the sealing ring (5) in turn has a connecting portion (15) for connection to the flange (7), and a portion (18) projecting from the flange; two sealing lips (19, 20) extend axially from opposite sides of the projecting portion (18); the two sealing lips (19, 20) and the projecting portion (18) are connected in one piece to one another at respective narrow sections (21, 22, 23), each defining a respective virtual hinge permitting rotation of each element with respect to the others; and the respective centers of rotation (A, B, C) of the virtual hinges are defined, at each axial section of the sealing assembly, by three points arranged substantially in the form of a triangle.

Abstract: A sealing ring for sealing a space between two substantially cylindrical space surfaces (36, 44) axially introducable one into the other comprises two annular sealing portions (2, 4) concentrically connected with each other. The sealing portions have one sealing surface (14, 16) each adapted to engage one space surface (44, 36) each. In its relaxed condition the sealing ring forms a recess (22) between the sealing portions (2, 4) and when this recess (22) is closed substantially without a compression of the sealing ring, the sealing surfaces (14, 16) take a substantially parallel position in relation to the space surfaces (44, 36), respectively. This provides that the sealing ring will at the compression between the space surfaces (44, 36) be subjected to a substantially uniform compression over the main part of its section.

Abstract: A sealing device for sealing a space established by connecting two sealing surfaces (42b, 52b) positioned on one element each of two elements (44b, 48b), for example two concrete pipes, to a position in which the sealing surfaces face each other comprises a sealing body (80) consisting of elastic material. The sealing body (80) is adapted at the connection of the sealing surfaces (42b, 52b) to take a position in the space in which it engages the sealing surfaces. The sealing device comprises an activating device (82-90) for forcing the sealing body (80) positioned in the space against the sealing surfaces (42b, 52b) when the activating device is activated. (FIG.

Abstract: A seal assembly (1) wherein two sealing rings (2) of the same shape and size are connected integral with each other, coaxially with a common axis (3), and in a position wherein they are rotated in relation to each other about the common axis (3); the sealing rings (2) presenting respective sealing lips (8) defining an annular cavity (25), and being so spaced as to define a passage (26) connecting the annular cavity (25) to the outside.

Abstract: In a method for manufacturing a thermoplasic pipe a pipe-shaped blank having larger wall thickness and less diameter than the completed thermoplastic pipe is positioned in a cylindrical chamber. The blank is formed by being softened and expanded into engagement with the inner surface of the chamber. A sealing ring is then mounted in an end portion of the plastic pipe by positioning the sealing ring in the expanded blank and shrinking the blank around the sealing ring by heating the pipe end portion.

Abstract: A device for sealing a space between an annular wall defining an opening and a pipe end portion introduced into the opening consists of a sleeve (2) having at one end thereof a flange (4) for restricting the introduction of the sleeve into the opening and having at its other end a flange (6) for restricting the introduction of the pipe end portion into the sleeve.

Abstract: A seal for concrete pipes wherein the sealing function can be controlled by varying the relative change of length under compression, the hardness of the elastomeric material or a combination of the two. The elastomeric body is of wedge-shaped cross section wherein the wedge-shaped end is positioned at the front in the direction of introduction of the pipe end. The elastomeric body further includes a base end having an introduction opening to a reception space. An attachment portion is anchored in the reception space of the elastomeric body and is adapted to control the degree of compression of the elastomeric body.

Abstract: A sealing device for a sealing space defined by sealing surfaces of two elements (2, 6), preferably pipes or well rings consisting of concrete, comprises a sealing element (28). The sealing element is adapted to seal a section of the sealing space extending transversely of the jointing direction of the two elements and has prior to the jointing of the elements a substantially C-shaped cross section.

Abstract: A sealing device for sealing two concrete pipe end portions in relation to each other comprises a sealing surface (4) in a socket (2) of one of the pipe end portions and a sealing surface (14) on a spigot end (12) of the other pipe end portion. The spigot end is introduced into the socket and there is between the sealing surfaces formed a sealing space in which an elastic material sealing element (26) is positioned in a compressed state. A closure device (28) is positioned in the sealing space between the interior of the pipe end portions and the sealing element (26) for preventing a medium conveyed in the pipe end portions from contacting the sealing element as well as the sealing surfaces at least in a region of the sealing element.

Abstract: A pipe joint comprising two sealing surfaces (6, 36) one positioned on each of two end portions (2, 4) of two pipes and a sealing device comprising a sealing ring (18). The sealing surfaces (6, 36) form a cylindrical sealing space in which the sealing ring (18) is compressed. In connection with the sealing ring there is in one of the pipe end portions arranged a circumferential cavity (34) partially receiving the elastic material of the sealing ring (18). The sealing surfaces (6, 36) form sealing space portions having a small and substantially equal space width on either side of the sealing ring (18) in the axial direction of the joint for forming supports for carrying transverse loads on either side of the sealing ring.

Abstract: A device for connecting a thin-walled hose (4) pulled into a pipe (2) with a tubular element (6) comprises a sleeve-shaped connector element (8). At one end portion the sleeve-shaped connector element (8) is connectable with the tubular element (6) while the other end portion of the connector element is sealingly connected with the thin-walled hose (4). The sleeve-shaped connector element (8) is connected with the thin-walled hose (4) by means of two annular, concentric sealing elements (14; 16) consisting of highly elastic material between which the wall of the thin-walled hose (4) is positioned.

Abstract: Vibration damper for damping vibrations in a surface (20) of an object (21). The damper consists of an oscillating body (1) which is movably connected to the surface such that it is brought to oscillate so that the oscillating body transmits forces to the object which are principally oppositely directed to the forces which, through vibration, act on the object. The vibration damper displays a locating part (19) made from a shaped permanent material and intended to be fixedly attached to said surface (20) of the object (21). The locating part displays one or several inwardly-directed vibration-transmitting support walls (26-29). The oscillating body (1) is at least partially enclosed in a damping body (10) made from an elastic material, and the damping body is held in the locating part through cooperation with the inwardly directed walls (26-29).

Abstract: A sealing device for sealing an annular space between two machine elements (2, 4) rotatable in relation to each other, comprising an elastic material sealing ring (8) and a counterface (36) engaged by a sealing lip (14) of the sealing ring. The sealing ring (8) has a main body (12) received in a groove (22) in one of the machine elements (2). The main body (12) of the sealing ring has, at least one of two side surfaces of the groove (22), at least one annular projection (18) engaging the opposite side surface of the groove.