Abstract: A flexible thermoplastic tube having a stiffening member installed inside is described herein. Mechanisms to couple both the stiffening member and outer tube are also described. The stiffened tube is particularly useful in oil skimming equipment for remediation of hydrocarbons in containment pools.

Abstract: A flexible thermoplastic tube having a stiffening member installed inside is described herein. Mechanisms to couple both the stiffening member and outer tube are also described. The stiffened tube is particularly useful in oil skimming equipment for remediation of hydrocarbons in containment pools.

Abstract: A duct for containing a cable and method for mounting the cable therein include providing the duct with a collapsible or flexible wall movable between a contracted condition for mounting the duct in a conduit and an extended condition of increased cross-sectional area for inserting a cable in the duct. The duct is moved to its extended condition by an applied internal pressure and, after the cable has been inserted, the duct is returned to its contracted condition. The duct has a multiple layer construction: an inner layer, an outer protective layer and a reinforcing layer between them. There may be frictional reducing ribs on the inner and/or outer layer in order to reduce the forces necessary to place the duct and/or the cable. Alternatively, the duct may have a single, thin layer.

Abstract: A coupling assembly including a coupler body having a generally cylindrical shape and an opening at one end. The coupler body has an inner wall with an inner circumference and an outer wall. An abutment extends from the inner wall of the coupler body. The coupling assembly further includes a conduit having a generally cylindrical shape complementary to the coupler body. A coupler key groove extends along the inner circumference of an inner wall of the coupler body and is shaped like part of a parallelogram. The conduit has a conduit key groove and is generally shaped like part of a parallelogram. When the coupler key groove and the conduit key groove are aligned they form a pathway shaped like a parallelogram with two acute angles. An aperture in the wall of the coupler provides access to the pathway for a locking strip or flexible key. The locking key has a cross-section, which is a complementary shaped parallelogram. A sealing groove is also provided along the inner wall of the coupler to hold an O-ring.

Abstract: A duct for containing a cable and method for mounting the cable therein include providing the duct with a collapsible or flexible wall movable between a contracted condition for mounting the duct in a conduit and an extended condition of increased cross-sectional area for inserting a cable in the duct. The duct is moved to its extended condition by an applied internal pressure and, after the cable has been inserted, the duct is returned to its contracted condition. The duct has a multiple layer construction: an inner layer, an outer protective layer and a reinforcing layer between them. There may be frictional reducing ribs on the inner and/or outer layer in order to reduce the forces necessary to place the duct and/or the cable. Alternatively, the duct may have a single, thin layer.

Abstract: A duct for containing a cable and method for mounting the cable therein include providing the duct with a collapsible or flexible wall movable between a contracted condition for mounting the duct in a conduit and an extended condition of increased cross-sectional area for inserting a cable in the duct. The duct is moved to its extended condition by an applied internal pressure and, after the cable has been inserted, the duct is returned to its contracted condition. The duct has a multiple layer construction: an inner layer, an outer protective layer and a reinforcing layer between them. There may be frictional reducing ribs on the inner and/or outer layer in order to reduce the forces necessary to place the duct and/or the cable.

Abstract: A machine for installing a plurality of cables together in a duct comprising a cable pushing machine and a cable wrapper. The cable wrapper comprises a platform rotatably attached to a mount. The platform and mount have aligned bores therethrough. Coils of winding media are attached to the platform. Cables pass through the bores, and the winding media is dispensed onto the cables. The platform rotates as the winding media is dispensed, thus wrapping the winding media around the cables. The cables are then passed through the cable pusher and into the duct. The rotation of the platform may be driven by the movement of the cables, or by independent means such as a motor.

Abstract: A coupler for connecting a pair of plastic pipes aligned end-to-end includes a rigid plastic sleeve having a center portion and two end portions. An internal passage longitudinally extends through the sleeve and is sized for receiving ends of the pipes. The center portion has a pair of spaced apart annular sealing grooves located within the internal passage. Each of the end portions has circumferentially spaced apart slits longitudinally extending from an end of the sleeve and forming a plurality of elements deflectable toward and away from the pipes. An annular flexing groove is located within the internal passage and near an inner end of the slits for increasing the flexibility of the elements. Each of the end portions also has an annular locking groove located within the internal passage and on the elements. O-rings are located within the sealing grooves for encircling the pipes and forming seals between the sleeve and the pipes.

Abstract: An aerial duct having a first duct in which a support strand is contained for aerially mounting the aerial duct, and a second duct in which an inner duct or liner is contained through which a transmission or other cable is strung. A multiplicity of support strands or several braided support strands could be contained in the first duct. The first duct and second duct are joined by an intervening web so that the first and second duct have substantially parallel longitudinal axes. The inner duct has spaced apart ribs formed within its inner surface. Valleys are formed between the spaced apart ribs and adapted to retain lubricant placed therein for facilitating the passage of a transmission or other cable through the inner duct. The ribs can be either longitudinal, corrugated or spiral. If desired, the aerial duct and support strand could be made of an all-dielectric material.

Abstract: A duct for transmission cable including a polymeric tubing having an inner and an outer wall. Spiral ribs having peaks and valleys are located on the inner wall. The valleys are adapted to receive lubrication and the peaks form a surface over which cable may travel at reduced friction. The spiral makes one revolution from about one to six linear feet, at rib heights from about 0.005 to 0.125 inch, and the spacing between the ribs is about 0.025 to 0.500 inch. The duct may be located in an outer duct which is normally buried underground, or directly buried or plowed. There may be a plurality of ducts placed in the ground with an outer duct. Longitudinal ribbing on the external walls prevents rotation.

Abstract: A concrete or metal substrate which is normally subject to deterioration in the presence of corrosive substances such as strong acids, particularly sulfuric acid, is rendered corrosion resistant when covered with the improved multilayered coating of this invention. In particular, a coated article, such as a coated chimney liner or flue duct, which includes a substrate, a primer coating layer of a thermosetting polymer, one or more inner coating layers of a thermosetting polymer which includes a siliceous filler, an intermediate coating layer of a thermosetting polymer which includes a non-siliceous filler, and a fluoroelastomeric top coating layer which includes a non-siliceous filler, has improved resistance to the corrosive effects of strong acids. Chimney liners, flue ducts, scrubbers, and the like which have been coated in accordance with this invention are useful in power plants, smelters, and other industrial settings where corrosive environments are present.

Abstract: Multi-layered coating compositions which comprise one or more inner coating layers which are admixtures of polymers formed from thermosetting polymeric materials and reinforcing filler materials and an outer coating layer which is an admixture of a fluoroelastomeric material and a reinforcing filler material are useful in preventing the corrosion and/or deterioration of surfaces which are in contact with corrosive substances such as strong acids, particularly, sulfuric acid. Such coating compositions are especially useful for preventing corrosion of the surfaces of the chimney liners, flue ducts and scrubbers which are present in many power plants and smelters.