A sealing assembly for attaching pliable tubes to rigid connecting members, for high pressure, low temperature service, which seals by compressing a sealing wafer around the pliable tubes. The pliable tubes pass through holes in the sealing wafer. As the wafer seal is axially compressed, the wafer seal is restrained against radial expansion, thereby exerting an inward radial pressure on the holes through the wafer seal to cause an hermetic seal between the wafer seal and the pliable tubes. A swage bushing can be used, with swage tubes that are swaged onto the pliable tubes by a swage clamp, for the purpose of axially restraining the pliable tubes.

A pipe joint assembly comprising, in combination, a pipe to be coupled having at a predetermined outer position spaced from its end a rolled circular groove of a preselected depth, said groove having a semicircular cross-section, a sleeve and a fastener mounted on said pipe, a seamless circular packing disposed in said groove, said packing having a circular cross-section, said sleeve having a rear end face of a given circular width which is adapted to make face-to-face contact with said packing, a body having a tapered inner surface, the diameter of which decreases in the rearward direction, said body receiving the end portion of the pipe, the forward or entrance diameter of said tapered inner surface being slightly larger than the outer diameter of said sleeve, said body and said fastener provided with means for connecting with each other, whereby, when said fastener is fastened on said body, said sleeve is reduced by the tapered inner surface of said body to securely contact said pipe and the rear end face of the sleeve simultaneously presses against said packing toward the interior part of the tapered inner surface so that said packing is deformed to a certain extent irrespective of the outer diameter tolerance of the pipe to make a tight contact with said groove, to make a tight contact with the tapered inner surface and to make a tight contact with the sleeve rear end face, respectively.

Sewer pipes and connector means therefor whereby they can be connected during pipe jacking or moling, the connector means including a sleeve element and a resilient sealing ring located in a groove in a spigot portion of the sewer pipe, means also being provided to prevent the complete disengagement of the end of a sewer pipe from the sleeve.

An apparatus to provide a threaded coupling for a pipe to enable the pipe which has had its threads broken to be joined to a mating threaded pipe. The threaded coupling permits the coupling to be affixed to the pipe when the pipe is located in a difficult to reach area. The invention is used with a pipe which has been broken in a house wall and it is desired to not have to rip out the entire wall to get at the pipe. A transverse opening is drilled in the pipe after a small section of wall adjacent the threaded end has been removed and a pin inserted into the opening. Thereafter, a collar with a recessed wall to accommodate the head of the pin and a shelf to abut the head of the pin serves to form a secure retaining means onto which a gasket to seal leaks and a pressing ring for engagement with a mating coupling is affixed so that the broken pipe can be joined to a mating pipe.

The spigot end of one pipeline element is inserted in the socket end of the other pipeline element and is sealed by a gasket. To the end face of the socket end is connected a thrust preventing ring, which is secured by claws to part of a collar. A retaining ring engages on the inner surface of the thrust preventing ring and its inner face is provided with a tooth system, which is fixed to the surface of the spigot end. Between the end face of the socket end and the retaining ring is provided a thrust ring, which exerts a pressure on the retaining ring. By means of in each case one packing element on the side of the thrust preventing ring facing and remote from the socket end, said ring is located in a sealed and consequently corrosion-proof zone. Thus, the socket joint is secured without any modification to the pipeline elements.