Abstract: A coupling assembly for joining together the ends to a pair of tubes, particularly suitable for use with plastics material, includes a pair of flange bushings, a sealing arrangement effecting a centering function and two semicircular shells having a U-shaped inner cross-sectional profile, each of the shells being provided with a resilient pawl which joins the shells together circumferentially about the coupling assembly. The sealing arrangement includes a centering ring and an inner sealing ring with the outer diameter of the centering ring performing in cooperation with the inner contour of the shells a centering function for the sealing arrangement. This centering function prevents displacement of the sealing arrangement during assembly and operation and permits the utilization of different types of seals and of smooth end faces of the flange bushings.

Abstract: A swivel coupling apparatus includes a pair of aligned metal pipe sections having grooved outer ends for connecting to hoses and rigid pipes by releasable clamp units. A gasket is disposed between the smooth end faces and an outer clamp housing encircles the end portions to mechanically connect the pipe sections. The pipe sections have outer shoulders with inclined clamp walls. The clamp housing includes a pair of semi-circular members having bolt clamping lugs for drawing the members onto the shoulders. The members having outer side clamp legs defining a cavity. A central rectangular spacer projects partially into the cavity for location between the outer portion of the end faces. The cavity has annular base walls between the spacer and side legs aligned with and outwardly spaced from the outer peripheral walls of the shoulders. Grease fittings to the opposite sides of the spacer provide for introducing of grease into the free space. The spacer has a smooth inner wall forming a backing for the gasket.

Abstract: A pipe assembly in which a plurality of abutting pipe sections are connected together by a clamp assembly. Each pipe section has a pair of diametrically opposed slots in its outer surface which are spaced a predetermined distance from its end. A support sleeve is inserted within the end portions of each pipe section and has a circumferential groove formed therein in axial alignment with the slots. The clamp assembly extends over the corresponding end portions of the adjacent pipe sections and includes two shoulder portions spaced apart a distance corresponding to the distance between the respective slots of adjacent pipe sections so that portions of each shoulder extend in a corresponding pair of slots.

Abstract: A pipe coupling for interconnecting pipes experiencing length changes, comprising a sealing gasket enclosed within a housing and having a substantially C-shaped cross-sectional configuration and open towards the inside. The end faces of end sections of the sealing gasket which merge at the web of the sealing gasket are each clamped, by means of a compression spring arranged within the sealing gasket, against a related substantially ring-shaped support disk which, in turn, is axially movable in conjunction with the one or other pipe with which such corresponding support disk is operatively associated.

Abstract: An elastomeric gasket for use with pipe coupled in end-to-end relationship wherein the coupling employs a split collar received within grooves within the pipe's circumference, the gasket being of a transverse cross section including deflectable lateral leg portions and a deformable central region. The leg portions include sealing surfaces engaging the pipe circumference, and the gasket configuration produces annular cavities between the central region and the leg portions in the normal relaxed gasket condition to permit the desired gasket deformation when compressed. The configuration and relationships of opposed adjacent surfaces of the leg portions and central region are such that when the gasket is under compression the cavities existing in the gasket when in the relaxed condition are totally eliminated by engaging gasket surfaces, and no voids exist in which foreign matter, water or fluids may be trapped.

Abstract: A pipe coupling is disclosed in which two identical tubular parts, to receive pipe ends, each have a flange at one end thereof and are held together, via their flanges, by a clamping ring which has a radially inwardly facing groove which receives the flanges. Each flange on its side remote from the other flange slopes outwardly from the periphery of the tubular part towards said one end thereof providing a ramp surface engaged by the free edge of a respective one of the two side walls of the inwardly facing groove of the clamping ring so that a circumferential tension in the clamping ring produces a wedging action urging the flanges into engagement with each other. In a variant each of the two tubular parts is angled with respect to its end flange so that by adjusting the tubular parts relative to each other about the common axes of their flanges, the angle between the axes of the main portions of the tubular parts can be adjusted, thus providing a pipe bend of adjustable angle.

Abstract: A pipe coupling comprising a housing which can be clamped about the pipe ends which are to be interconnected, there being enclosed within such housing an inwardly open gasket of substantially C-shaped cross-section having confronting legs constructed as sealing lips and the web of which bears against the inner surface or inside of the housing. The web is supported upon the sealing lips by a respective spiral or helical spring ring.

Abstract: A pipe coupling comprising a housing which can be clamped about pipe ends which are to be interconnected, and within which housing there is enclosed an inwardly open sealing gasket possessing a substantially C-shaped axial cross-sectional configuration, and both ends of which are supported upon the outer jacket surface of a respective substantially truncated cone-shaped clamping ring, each of which is retained at its outer periphery in the axial direction within the housing and is provided with claws which engage with the periphery of the pipe ends. The clamping rings are clamped in the housing at the region of their larger diameter by means of a fixture or socket engaging both at their outer as well as their inner jacket surface.

Abstract: Pipe coupling for the high-strength coupling of plastic pipe ends, a coupling sleeve having internal sawtooth ridges which mesh with counter profiles on the pipe ends.

Abstract: A means for adapting the end of a plastic pipe for coupling is provided in which the pipe is recessed circumferentially and the recessed area is further indented with three circumferential grooves. A first metal sleeve is shrink-fitted into the recessed area adjacent to the first groove furthest removed from the end of the pipe and further removed from the end of the pipe than this groove. A gasket ring of resilient material is inserted into a second groove which is between the first groove and the end of the pipe. A second metal sleeve having the same outside circumference as the third metal sleeve is shrink-fitted into the recessed area adjacent the first groove, encasing the gasket ring in the second groove, and indented into a first groove near the end of the pipe leaving a circumferential indentation spaced from the end of the pipe to receive one portion of a coupling device.

Abstract: A coupling assembly to connect and seal the joint between the ends of axially aligned pipe sections of differing outer diameters; A gasket for sealing against and around the juxtaposed ends of axially aligned pipe sections of differing outer diameters; Coupling housing segments adapted to contain such a gasket radially and axially while engaging with the ends thereof grooves in the outer surfaces of the pipe section ends being coupled and connected.

Abstract: Concrete pumping conduits are connected by releasable hinged couplers. The ends of the conduits include metal pipes formed with annular grooves including a circular peripheral base and a stepped end wall immediate adjacent the end of the pipe to define a pair of generally parallel and radially extended, inclined sidewalls. The coupler is formed with inwardly projecting legs with the inner walls similarly stepped and defining a pair of generally inclined radial sidewalls offset in accordance with the offset of the grooved siewalls, but slightly less than such spacing. A sealing gasket is located within the base of the cup-shaped recess with a tongue-like ridge projecting between the two end faces of the pipe ends. The first radially outermost sidewalls of the coupler and the radially innermost sidewalls of the groove engage upon closing to provide a mechanical connection. The gasket is collapsed to seal the joints.

Abstract: A pipe coupling includes arcuate shaped housing segments for positioning on the enlarged diameter ends of thin wall large diameter pipe as a complete coupling. The inside diameter of the coupling housing is larger than the corresponding pipe diameter such that the coupling does not contact the outside surface of the pipe. Each of the housing segments include a base portion and radial inward projections forming a gasket receiving groove. Each of the housing segments additionally include interlocking alignment means at connecting ends to radially and axially align the housing segments. The coupling also includes a gasket positioned within the gasket receiving groove and clamping means for drawing the housing segments together to couple and seal the connecting pipes with the gasket.