Abstract: A liquid sealant of the aqueous emulsion type to be delivered in foamed state into a pipeline requiring leakage repair and/or prevention. A large part of this sealant is drained from the pipeline, and the part of the sealant remaining on inner walls of the pipeline is allowed to cure. The sealant contains coagulations of weakly cohering fine particles of inorganic oxide at less than 5 percent, and the particles have diameters not exceeding 0.05.mu..

Abstract: A flexible tube for conveying a mixture of a liquid or solid material containing objects with sharp points, edges or similar projections, the internal wall part of said tube consisting of an elastic material, especially rubber, in which a wearproof material is present in the shape of rod-shaped elements which are provided essentially parallel and at a distance form one another in said internal wall part in such a way that they extend themselves between the inner and the outer surface of said internal wall part, the shortest distance between the most closely spaced wall parts of said elements being at least equal to the greatest dimension (D) of the rod-shaped elements as seen in the radial direction of said elements.

Abstract: A non-linear pipe segment, such as an elbow or the like, is disclosed having an inner liner (14) of a wear-resistant material. The outer shell of the segment is in two halves (10, 12) which are coated with a layer of bedding material (16) before being secured around the lines (14) by clamping means (28).

Abstract: A rubber tube for dredging work embedded in and used in a pipe-line used for dredging work in the sea or river. This rubber tube has a tubular body made of rubber having a plurality of strengthening clothes embedded therein, and a plurality of metal rings axially arranged in a suitably spaced relation which are embedded in an inner peripheral surface of said tubular body and which inner peripheral surface forms a part of the inner peripheral surface of said tubular body. The metal rings have their joined surface with the tubular body placed in parallel to the axis and axial both ends thereof made thin in wall-thickness. Thereby, a contact area between the metal ring and the tubular body is increased to strengthen a bonding force and minimize a peeling off of the joined surface between both ends of the metal rings and the tubular body.

Abstract: A tile-lined pipe and its method of manufacture comprising a tubular pipe member having a layer of tile elements on the inner surface to form a lining therefor. The tile elements extend one after another along helical lines and are formed by subdividing larger tiles transversely along score lines so that the adjoining faces of the subdivided tiles will be in closely conforming adjoining relation. Within the tile elements is an erodible layer. The structure is encompassed by resin saturated fiberglass. The resin serves to absorb energy from impacting particles.

Abstract: A valve housing has butt pipes for connection to a pipeline for defining therewith a passage for a flow of a fluid being conveyed, preferably of a slurry. A plurality of ribs are provided along the passage on the lower portion of the wall thereof, each rib extending transversely of the passage. Each rib is of a tear-shaped configuration in its section taken along the longitudinal centerline of the passage, the enlarged portion of the rib facing toward the incoming flow of a fluid being conveyed.

Abstract: A wear resistant body mountable at a directional change point within a particulate material duct. A plurality of successively spaced cavities are formed in the body to trap and collect particulates flowing across the body such that the collected particulates act as a wear resistant barrier to wear of the body and the adjacent inner wall surface of the duct. A plurality of spaced, planar ribs are mounted on the body, with adjacent ribs defining a cavity therebetween.

Abstract: An elbow and process for fabrication for use in particulate material conveyancing comprising a curved outer pipe, a curved inner pipe having the same radius of curvature as the outer pipe, concentric with and internal to the outer pipe, comprising an outer layer comprised of a first material and an inner layer comprised of a second material wherein said first material is characterized by high erosion resistance when impinged by particulate material and wherein said second material is characterized by high tensile strength and flexibility, and an inner pipe supporting means for providing support to said inner pipe, disposed between said inner pipe and said outer pipe.

Abstract: This invention provides an improved system for transporting plastics articles such as containers for foods from one place such as a plastics articles-manufacturing plant to another such as a goods-charging plant and encompasses vehicle means for transporting the articles in large quantities, devices which receive the articles from the vehicle means, convey the articles and discharge them into a pipeline for pneumatic conveyance and a device which is installed at the delivery end of the pipeline, which stores the articles and which is provided with means capable of discharging them therefrom at a predetermined rate.

Abstract: A primary conduit for a dilute phase particulate laden pneumatic stream is aligned with a dead pocket at the intersection of the primary conduit with secondary and tertiary conduits perpendicular to the primary conduit. The primary conduit is adjustable with respect to the dead pocket to vary the position at which the stream is directed into the dead pocket to thereby control division of the amount of particulate separated into the secondary and tertiary conduits. Thus, the ratio of particulates entering the secondary and tertiary conduits may be varied in a predetermined manner.

Abstract: A centrifugal blower has an offset between a housing rim sheet and discharge conduit outer wall. A vertical panel attached to the rim sheet guides the feed material into the silo pipe center portion without contacting the conduit outer wall and discharge duct. An air inlet for secondary air flow is provided in this offset to supplement the principal air flow entering through material feed inlet into the blower and to provide an air cushion between the air-borne material and outer wall, as well as the initial portion of the discharge duct.

Abstract: A method and apparatus for transporting gas-borne particulate material comprising a pneumatic conveyor having an elongate duct. In order to inhibit formation of stagnant pockets and recirculation of solids within the duct, an annular flow of gas is introduced into the duct, preferably along its peripheral wall. The annular flow is auxiliary to the main flow and may be introduced via an annular passage encompassing an inlet section of the duct and extending longitudinally of the duct. Gas may be supplied to the annular passage from an annular plenum chamber surrounding the duct.

Abstract: An elbow is disclosed for use in effecting short radius turns in fluent transport systems while overcoming the previous problem of high wear at the turn. The subject elbow includes entry and exit ports at right angles to each other, an arcuate channel extending between the ports, and a chamber aligned with but axially offset from the entryport. The effect of this chamber is to provide abrasive resistance for the elbow by allowing a soft plug of the fluent material to form therein. The material forming the plug will rotate in a vortex manner in the chamber. The subsequently passing fluent material will deflect off of the soft plug rather than rub on the walls of the elbow while making the direction change. The elbow may be provided with an optional purge vent entering into the chamber.

Abstract: A dredger device for conveying sand or gravel or the like lying under water in which the material enters a conveyor head and is conveyed through a variable length tube into a receptacle on the dredger. In the interior of the variable length tube there is a flexible tube having one end connected to the conveyor head and the other end connected to a hose reel. The conveyed material travels through the interior tube to the hose reel and through an opening therein to a receptacle.

Abstract: A ball valve assembly for controlling the flow of abrasive particulates including an enlarged section at the bore inlet and an enlarged section at the bore outlet. A refractory ceramic annular deflector is positioned in each of the enlarged sections, substantially extending the useful life of the valve.

Abstract: The present invention is for a continuous system wherein spent catalyst is removed from a regeneration vessel, while fresh catalyst is added in order to maintain proper catalyst activity in a hydrocarbon processive system. The withdrawal of the spent catalyst must be achieved at a steady flow rate which is compatible with the introduction of fresh catalyst of the hydrocarbon processing system. This flow rate is controlled by a downstream pressure and venting control in the spent catalyst hopper stage acting in conjunction with a novel flow restriction zone in a discharge conduit.

Abstract: A rotor diverter valve operable for diverting materials in a pneumatic conveying line to secondary locations with the rotor diverter valve including a housing and pivotally mounted rotor having a pair of converging passages therein that can direct material from an inlet in the housing to one of a plurality of outlets on the housing through proper position of the rotor within the housing. The housing includes interchangeable inlet and outlet attachments that can be tightly sealed around the converging passages in the rotor.

Abstract: An abrasion resistant bend or elbow like construction for small pipelines of relatively small, i.e., 2 to 8 inch, inside diameter is formed of soft, ductile metal, normally mild steel. The outside bend portion most subject to abrasive attack is prefitted prior to use with a frame and cover arrangement which receives, maintains and provides a dustproof and pressure tight cover over a plurality of ceramic wear liners which receive the abrasive attack after the metal forming the outside bend portion is worn away in use.