Abstract: A sealing ring for sealing in a pipe joint an annular space between a socket end and a spigot end introduced therein comprises an annular sealing portion (8) consisting of elastically yielding sealing material and a substantially annular reinforcing portion (10) consisting of a material which is rigid in relation to the elastically yieldable material, the sealing portion (8) and the reinforcing portion (10) being fixedly connected with each other at the connection surface (18). The outer surface (40) of the sealing ring has a surface portion which is of a shape corresponding to the shape of the connection portion as parallelly displaced in the axial direction of the ring. The invention also relates to a mould for manufacturing such a sealing ring by means of injection moulding.

Abstract: A method of forming at the end portion of a thermoplastic material pipe in a pipe socket. The pipe end portion is molded around an annular sleeve onto which is bonded a sealing ring having an outer sealing ring adapted for sealing against the pipe end portion and an inner sealing ring, connected to the outer sealing ring, adapted for sealing against an outer surface of a spigot end of a connecting pipe introduced into the socket.

Abstract: The present invention relates to a seal (1) comprising a sealing means (2) and a casing means (3). The casing means (3) is arranged with a Z-shaped member (7, 10, 11), of which one portion (10) preferably is arranged with recesses (13) in order to provide for a rotational speed and measuring means.

Abstract: A pipe socket comprising a sleeve (2), an end portion (8) of a pipe (10) of thermoplastic material, an outer sealing ring (4) and an inner sealing ring (6). The sleeve (2) constitutes the inner surface of the pipe socket, and the end portion (8) of the pipe is molded around the sleeve. The outer sealing ring (4) is positioned between the inner surface of the pipe end portion and the outer surface of the sleeve for sealing the pipe end portion and the sleeve in relation to each other, and the inner sealing ring (6) is adapted to seal the space between the inner surface of the pipe socket and the outer surface of a spigot end of a connecting pipe introduced into the socket. The outer sealing ring (4) and the inner sealing ring (6) are connected with each other. The invention also relates to a method of manufacturing a pipe socket (FIG. 1).

Abstract: In a method for forming an end portion of a plastic pipe wherein the end portion is transferred to softened state and the end portion is provided with an internal groove by axially displacing the pipe end portion in relation to a mould ring which is thereby introduced into the pipe end portion. After the forming of the pipe end portion the mould ring is left in the pipe end portion for forming a sealing ring therein. During the forming operation the pipe end portion is supported on a mandrel. In accordance with the invention the mould ring is displaced into the pipe end portion by displacing the ring along the mandrel while the pipe end portion is in its softened condition supported by the mandrel substantially without being displaced along the mandrel.

Abstract: A sealing ring for sealing the space between two substantially coaxial sealing surfaces which are axially insertable one in the other to a jointed position, especially for sealing the annular space between socket and spigot end of a pipe joint, comprises a first sealing portion (2) and a second sealing portion (4). The sealing portions are adapted at the axial insertion movement substantially stationary to engage one surface each of said sealing surfaces and to slide against each other. The first and the second sealing portion are by means of a releasable and/or substantially expensible connector portion (6) connected with each other at least at the front side of the sealing ring in respect of the direction of insertion movement of the second sealing surface during the jointing of the sealing surfaces.

Abstract: An apparatus for forming an end portion of a plastic pipe wherein the end portion is transferred to softened state and the end portion is provided with an internal groove by axially displacing the pipe end portion in relation to a mould ring which is thereby introduced into the pipe end portion. After the forming of the pipe end portion the mould ring is left in the pipe end portion for forming a sealing ring therein. During the forming operation the pipe end portion is supported on a mandrel. In accordance with the invention the mould ring is displaced into the pipe end portion by displacing the ring along the mandrel while the pipe end portion is in its softened condition supported by the mandrel substantially without being displaced along the mandrel.

Abstract: A mould and sealing ring constitutes a mould element in forming a socket end on a pipe consisting of thermoplastic material and seals the space in a pipe joint between the socket end and the spigot end of a pipe introduced into the socket end. The mould and sealing ring comprises an annular sealing portion consisting of elastically yieldable sealing material and a second substantially annular portion for reinforcing the mould and sealing ring consisting of a material which is rigid in relation to said elastically yieldable material and is connected with the elastically yieldable material at a connection surface.

Abstract: A device for removing dirt and contaminants from a surface comprises a number of fibres (24) fixedly supported at one end and extending towards and engaging at a contact surface (28) the surface (2) from which the dirt and contaminants shall be removed. The fibres (24) have conveyor surfaces (32) extending obliquely in relation to the direction of relative movement between the fibres and said surface (2), said conveyor surfaces being adapted to move the dirt and contaminants away from said surface in direction transversely to the direction to said relative movement between the fibres (24) and said surface (2).

Abstract: A sealing ring for sealing a space between the outer surface of a spigot end and the inner surface of a socket end in a pipe joint comprises an annular sealing element consisting of elastomeric material and a substantially annular locking element consisting of a rigid or semi-rigid material. The locking element is divided at at least one point of its periphery and constitute at this point two spaced portions. Between these portions there is positioned a connecting element consisting of a material which is substantially more elastic than the material of the locking element.

Abstract: A sealing device is adapted to seal a bearing (2) which is adapted to be positioned in an annular space between two cylindrical and concentric surfaces of two machine elements (30, 32) which are rotatable in relation to each other. The sealing device comprises an annular element (16) which is adapted to be connected with one (26) of the substantially cylindrical surfaces, thereby forming a clearance space in relation to a portion (4) of the bearing (2), which is firmly connectable with the other (28) of the substantially cylindrical surfaces.The annular element (16) and said portion (4) of the bearing (2) include engagement surfaces (22, 24) which are displaceable to and from firm engagement with each other by axial displacement of the annular element and said portion of the bearing in relation to each other.

Abstract: A mould portion and/or protective element of the type consisting of a material subjected to deformation is disclosed. A method and a device for manufacturing such a mould portion and/or protective element are also disclosed.The mould portion and/or protective element is preferably intended to be used as a mould portion in moulding an article and/or as a protective element to prevent access of soil and water to a surface portion of the article during transportation and storage thereof.Such materials subjected to dimensional changes as can be used as mould portions and/or protective elements present the advantages of being inexpensive and permitting removal of the article without difficulty. One such material is for example cellular plastics. The dimensional changes, however, have entailed so great difficulties in using mould portions and/or protective elements of such materials that they have made the use of the material impossible.

Abstract: A mold for manufacturing an annular object of elastic material such as a sealing ring having a reinforcing element which is completely or partially embedded therein, comprising support surfaces on pin members supported by the mold and projecting into the mold cavity which support and retain the reinforcing element in the correct position within the mold during injection of the elastic material to be formed within the mold cavity. The pin and the mold cavity have opposing surfaces which guide the inserted reinforcing element into the correct position prior to injection of the elastic material. The mold is made in separate parts so that the parts can be removed after the elastic material has set, to open the cavity for removal of the finished product with the reinforcing element embedded therein.