The pipe access device is comprised of a curved plate adapted to engage an underground pipe along an arc of the outer surface of the pipe, and a boss extending upwardly from the curved plate about an aperture in the curved plate. The boss is adapted to receive an extension pipe. The boss includes a flange adapted to engage ad end of the extension pipe. A gasket is combined with the flange to help seal the connection between the boss and the extension pipe. The pipe access device is for use in providing access to the buried pipe that requires minimal excavation and disruption of the soil.

A duct coupling system has a first concrete segment, a first duct positioned in the first concrete segment so as to have an end extending outwardly therefrom, a second concrete segment, a second duct positioned in the second concrete segment so as to have an end extending outwardly therefrom in a direction toward the end of the first duct, and a tubular member slidably positioned over the ends of the first and second ducts so as to join the first and second ducts together in a liquid-tight relationship. The first concrete segment is positioned in spaced relation to the second concrete segment. A wet joint is formed in the space between the first concrete segment and the second concrete segment. The tubular member is embedded in the wet joint.

A coupling fitting comprises a pipeline and a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.

A pipe and fitting coupling system includes a first pipe, a second pipe, and a joint. A receiving end of the second pipe includes a first flange, a second flange, a groove, and a sealant. The second flange extends further than the first flange. The groove is disposed at the pipe diameter and between the first flange and the second flange. The first flange has an inwardly angled face to meet the groove and the second flange has an outwardly angled face to meet the groove. The sealant is disposed in the groove to seal the plain end of the first pipe in the receiving end. The joint is formed by the cooperative alignment of the plain end being inserted into the receiving end and being sealed by the sealant.

Channel joints (1) can permit bonding a tube or tubular member (30) to an end fitting (20) in double shear. The channel joint may include a receiving channel (25) in the end fitting (20) that is complementary in shape to the tube, tubular member, or other hollow member (30) that is to be fitted and bonded with the end fitting. The use of a channel joint allows for simplified assembly because the receiving channel acts as a reservoir for the bonding agent or adhesive (50). Upon insertion of the tube, tubular member, or other hollow member into the adhesive-loaded receiving channel, the adhesive will backflow to fill the voids in the joint and expel the excess adhesive.

A system of jointing reinforced thermosetting resin (RTR) pipe, including: a first RTR pipe with a spigot portion, the spigot portion having a first joining surface; a second RTR pipe with a socket portion shaped to receive the spigot portion, the socket portion having a second joining surface; and a cavity between the first joining surface and the second joining surface, the cavity formed when the spigot portion is push-fit into the socket portion; and an injectable/curable material located in the cavity. Additionally, a method of jointing RTR pipe, including the steps of: push-fitting a spigot portion of a first pipe into a socket portion of a second pipe, forming a cavity between the spigot portion and the socket portion; injecting a joining compound into the cavity; and curing the joining compound.

A duct coupler assembly includes a female duct coupler, where the female duct coupler is coupled to a first duct segment. The female duct coupler includes a female duct coupler body having an inner surface having an inner diameter and a bayonet slot formed therein. The duct coupler assembly further includes a male duct coupler. The male duct coupler is coupled to a second duct segment. The male duct coupler includes a male duct coupler body having an outer surface having an outer diameter, where the outer diameter is smaller than the inner diameter of the inner surface of the female duct coupler body. The male duct coupler has a bayonet post extending from an outer surface of the male duct coupler body, and the male duct coupler body is positioned within the female duct coupler body such that the bayonet post is positioned within the bayonet slot wherein the male duct coupler is coupled with the female duct coupler.

A duct coupler assembly includes a female duct coupler, where the female duct coupler is coupled to a first duct segment. The female duct coupler includes a female duct coupler body having an inner surface having an inner diameter and a bayonet slot formed therein. The duct coupler assembly further includes a male duct coupler. The male duct coupler is coupled to a second duct segment. The male duct coupler includes a male duct coupler body having an outer surface having an outer diameter, where the outer diameter is smaller than the inner diameter of the inner surface of the female duct coupler body. The male duct coupler has a bayonet post extending from an outer surface of the male duct coupler body, and the male duct coupler body is positioned within the female duct coupler body such that the bayonet post is positioned within the bayonet slot wherein the male duct coupler is coupled with the female duct coupler.

The method of providing a connector suited for quickly connecting and testing joints of pipe for a subsea pipeline and similar applications by concurrently locking, preloading, sealing and testing of the connection to eliminate the usual sequential time requirements for each of these operations. Additionally, time for coating and X-Ray inspection of the welded connection in critical path time are eliminated as the welding and coating operations are able to be done on shore in non-critical path time.

We disclose an article of manufacture comprising a short section of PVC pipe with fittings. In its best embodiment, the pipe takes the form of a 1-2 section of PVC pipe fashioned into a U-bend, and the fittings take the form of an elbow joint glued onto each end of the U-bend. We further disclose a method of repairing cracked PVC piping using the article. The method involves cutting out a 4-6 section of piping, gluing the exposed ends of the broken piping as well as the elbow joints, squeezing the U-bend, positioning the squeezed article into the gap in broken piping, and releasing the U-bend to fit the elbow joints over the exposed ends of broken piping. The article has no vulnerable moving parts or O-rings, and it obviates the need to remove entire pipes.