Abstract: An inexpensive and easy to use coupling for connecting one end of a corrugated flexible hose to a meter or distributor outlet, or to another hose on an implement such as an air drill or seeder. Two generally semi-cylindrical portions are molded as a single unit with integral hinge and locking structure. The inner surface of the cylindrical member is corrugated to correspond to the corrugations on the flexible hose, and an end portion of the coupling device includes an annular groove which mates with a flange on the outlet. The locking structure automatically latches as the semi-cylindrical portions are closed around the hose and the flange.

Abstract: A plastic corrugated tube, in the outer wall of which has a circular ring corrugation, is provided on one end with an integrally molded-on plain coupler having an approximately cylindrical inner face. Its inside diameter (d) is substantially equal to the outside diameter (d) of the corrugated tube, and the circular rings that form the corrugation and are spaced apart from one another by the distance (T) in the longitudinal direction of the tube each have the approximate cross section of a trapezoid tapering toward the outside; to this end, they have an approximately annular-cylindrical outer wall section (a) and slightly inclined side wall sections adjoining the outer wall section.

Abstract: A flexible corrugated hose coupling apparatus is provided for coupling a corrugated hose to a cylindrical neck or sleeve. A resilient hollow cylindrical coupling member has two ends and a generally smooth interior and exterior cylindrical surface and has an annular coaxial bore extending into one end thereof and shaped for threadedly receiving a corrugated hose of a predetermined size to allow the flexible coupling member to be threaded onto the end of a flexible corrugated hose. A clamp can be extended around the resilient hollow cylindrical coupling member for clamping the coupling member and the hose threaded thereinto a coupling neck, such as the neck from a vehicle radiator, so that a flexible corrugated hose can be cut to any length and attach to a smooth or rigid neck with a clamp to achieve a fluid type seal between the corrugated hose and neck.

Abstract: A connection assembly is particularly useful for positively connecting a flexible hose member with an inlet plug for a suction source while being adapted for subsequent disconnection without requiring any specialized tools. In connecting operation, an integral extension portion of a flexible hose member is telescopically inserted into an inlet plug to a predetermined longitudinal stopping point therein, and then rotated so as to cause engagement of projections formed on the extension portion and projection-receiving holes formed in the inlet plug. Such engagement rotatably and longitudinally secures the flexible hose relative the inlet plug. Slots are formed in the inlet plug for guiding the hose member projections during longitidinal movement of the hose member. The hose member may be selectively withdrawn by reverse rotation of the hose extension portion and longitudinal removal thereof from the inlet plug.

Abstract: An aquatic vacuum hose swivel cuff coupling comprises, in combination, a blow-molded vacuum hose and a molded swivel cuff. The hose includes one end which terminates as a corrugated end portion having circumferential grooves therein. The swivel cuff component has a seating portion for receiving the corrugated end portion of the hose and at least one annular ring adapted to fit within the circumferential grooves of the hose, the annular ring being provided about the hose entrance to the seating portion of the cuff. The corrugated end portion of the hose is maintained within the seating portion of the cuff by the annular ring being disposed within the circumferential grooves whereby the hose may be swivelably rotated within the cuff. The corrugated end portion of the hose is extruded with the continuous extrusion blow-molded hose thereby eliminating the need to weld components such as seals.

Abstract: Twin seals are provided between an end fitting and a convoluted hose connected thereto. The end fitting has two parts, one of which terminates in an elongated member having large and coarse threads on the outside thereof. As the elongated member is turned into the end of the hose, convolutions at the end of the hose are either scrunched and squeezed together or stretched over a ramp section. One of the seals is along the surface of the large threads and the other is a result of the end thrust either the scrunching and squeezing or the stretching of the end convolutions. A pilot end of braid on the hose pulls it to increase the end thrust. In some embodiments, a third seal is made between the outside surface of the hose and a gland surrounding the hose.

Abstract: A connector for corrugated tubing, such as electrical conduit, provides easy installation and has superior resistance to pull out as well as high impact strength. The connector has a body with two slots on each side and a U-shaped locking element which snaps over the corrugated tubing. The locking element locks onto two portions of the circumference of the tubing, substantially symmetrically on both sides.

Abstract: An adapter for coupling a corrugated drainpipe to a sewage disposal site employs a tubular member which is hollow throughout its length for connecting the drainpipe in fluid communication with a sewage disposal site. The tubular member has a drainpipe end portion having a complementary shape and size adapted to engage threadably an end of a corrugated drainpipe, and a sewer inlet end portion adapted to be inserted through an inlet opening of a sewage disposal site.

Abstract: Apparatus and method for interconnecting a rubber, fluid-impermeable cup having a wall thickness with a reservoir characterized by an attacher having interference fit with an aperture in the wall of the cup so as to form a fluid-impermeable seal, and a stem and flange over which a short section of rubber tubing is inserted sufficiently to exert a force against the flange the wall of the cup to effect a fluid-impermeable seal joint and a mechanical joint without adhesives. Preferably, the short section of rubber tubing is corrugated so as to allow being being without blocking flow of fluid therethrough and has corrugations extending beyond the attacher so as to not block the bore through the attacher.

Abstract: A connector for firmly engaging the exterior annular ribs on non-metallic conduit includes a tubular sleeve with a stop wall at one end, the stop wall having an opening therethrough. Several latch tabs are formed in the side wall of the sleeve, the tabs being inclined inwardly so that the ends of them extend into the interior of the sleeve. When a piece of conduit is inserted until it abuts the stop wall, the tabs snap into recesses adjacent the end rings. On the other side of the stop wall are hook members to engage the opening in a junction box or an identical sleeve for engaging a second piece of conduit.

Abstract: A device is disclosed for coupling a drainpipe to a recreational vehicle discharge pipe fitting of the type having a terminal end portion with circular periphery and a plurality of locking pins extending outward radially from the periphery. The device employs a tubular member having a proximal end and a distal end. A drainpipe end portion of the tubular member terminating at the distal end has a complementary shape and size adapted to engage threadably an end of a corrugated drainpipe, while a fitting end portion of the tubular member terminating at the proximal end has a complementary shape and size adapted to engage telescopically a terminal end portion of the discharge pipe fitting.

Abstract: A telescopic joint in low pressure corrugated plastic pipe. The joint includes a one-piece elastomeric gasket which functions as a seal between the telescoped pipes. The gasket has a sealing portion adapted to be disposed in a groove in one of the pipes and an anchoring portion adapted to be disposed in an adjacent groove. As the pipes are telescoped together the anchoring portion is trapped in the groove and anchors the sealing portion in place as it is compressed due to an interference fit with the pipes as the joint is made.

Abstract: A coupling for circular spiral lock seam conduit sections is comprised of a band curved to encircle the conduit, preferably with overlapping ends, a groove running along the interior of the band of sufficient cross section to receive the spiral lock seam, and clamps for tightening the band around the conduit sections. The groove runs at an angle along the band to form a spiral when the band is curved around the conduit sections, which mates with the spiral of the lock seam. The width of the groove exceeds that of the lock seam so that when the band is tightened the groove will shift laterally, sealing one side of the groove against the facing side of the lock seam. Other features are included to provide the maximum degree of sealing around the entire circumference of the conduit sections.

Abstract: An adapter for coupling a corrugated drainpipe to recreational vehicle discharge pipe employs a tubular member having a discharge pipe end portion of a shape and size adapted to be placed over an outlet end of the discharge pipe, and a drainpipe end portion having a shape and size adapted to engage threadably an end of a corrugated drainpipe. A helically-shaped thread along the drainpipe end portion are sized and shaped complementary to conform to the corrugations of the corrugated drainpipe enables threaded engagement of the corrugated drainpipe.

Abstract: A tubular conduit assembly for confining or conveying a pressurized fluid including a flexible, thin-walled inner tube coaxially disposed within a flexible armor or outer tube. The outer tube is preferably constructed from one or more helically-wound members corresponding with, and engaging, helical corrugations on the inner tube. The inner tube deforms in response to the pressure and/or temperature of the fluid in order to form an internal sealing layer or sleeve-type coating for the outer tube. A shrink fitting assembly is also disclosed, which is adapted for compressingly urging the conduit assembly into an anchored, sealing relationship with a nipple member or other connection device inserted within an open end of the conduit assembly.

Abstract: An improved coupling for a corrugated conduit includes a main tubular body with a sleeve defining a conduit receiving bore terminating at its inner end in an annular shoulder projecting radially inwardly of the tubular body. A nipple clamps the end portion of the conduit and is inserted together therewith into the conduit receiving bore where it is pressed forwardly by rotating a nut threaded on the sleeve for forcing the end of the conduit into pressing contact with the shoulder. The nipple is externally shaped to have a polygonal configuration so as to be slidably but unrotatably inserted in the correspondingly shaped conduit receiving bore, preventing the conduit from being twisted during the securing operation of rotating the nut about the sleeve.

Abstract: A coupler for interconnecting in fluid communication a pair of axially aligned flexible pipe ends, employs a tubular member for insertion between two sections of drainpipe to be coupled. A first thread is included on a first end portion of the tubular member for threaded engagement of a first one of the two sections of drainpipe, along with a second thread on a second end portion for threaded engagement of the second section. An integrally formed annular flanges in one form of the invention serves as a grip with which to manually screw the tubular member onto the drainpipe, while a cutback portion on the flange prevents misalignment of the coupled sections at the coupling when placed upon the ground. Tapered end pieces that screw onto each end to accommodate smaller drainpipe are provided in another form, with the threads of the tubular member matching the helically-corrugated plastic casing surface of conventional RV drainpipe.

Abstract: A system of flexible conduit and fittings useful particularly, though not exclusively, for conveying, supporting and connecting electrical service cables and wires. The system includes a corrugated, synthetic resin conduit which is flexible and mechanically strong, connector sleeves for clampingly engaging sections of the corrugated conduit in end-to-end relation, and hanger sleeves for clampingly engaging the conduit and suspending it from a wall or similar surface. A novel electrical outlet box is provided and includes internally toothed conduit-receiving inlet fittings for securely engaging an end of the conduits in inlets to the box.

Abstract: A pipe joint suitable for connection with a flexible tubular member includes a joint body, a sleeve and a cap nut. The cap nut is threadably fitted over one end portion of the joint body defining a tapering axial bore communicating with a cylindrical axial bore and having a shoulder at its axial inner end. The sleeve split axially into a plurality of segments at a cutout has a flange at its axial outer end, and at least one ridge of a currugation extending from its inner surface into engagement with one of grooves of a corrugated outer surface of the flexible tubular member. To assemble, the sleeve is fitted over the outer surface of the flexible tubular member in such a manner that one to five ridges of the corrugated outer surface of the flexible tubular member extend axially inwardly of an axial inner end of the sleeve, and the flexible tubular member is inserted in the tapering axial bore while the sleeve is held between the cap nut threadably fitted over the joint body and the flexible tubular member.

Abstract: In one form of the invention, the swivel hose couplings include two parts, a swivel insert which may be threaded or otherwise attached to the end of the hose, and a swivel hose end piece which has an internal groove therein in which an exterior portion of the swivel is rotatably received. A sealing lip may be provided on the exterior of the swivel insert to form a seal with the wall of the internal groove in the swivel hose end piece. Also, a skirt portion may be provided on the swivel hose end piece which extends axially into the end of the hose to shield the axial outer end of the swivel insert and hose end against entrained material in the fluid passing through the coupling from entering the swivel connection between the swivel insert and swivel hose end piece.

Abstract: A burner element for gas fired barbecue grills of varying designs and styles is rendered universal in its applicability to such grills by the provision therein of gas/air inlet openings in varied arrangements to enable connection of the burner element to flexible length adjustable venturi tubes in different modes of use, such as in a bent extended mode or a straight foreshortened mode. Inactive gas/air inlet openings of the burner element are covered during non-use. A burner system is provided which is compatible with grills having either post mounted or panel mounted burner controls.

Abstract: The invention pertains to the attachment of a wrenching nut to a metal conduit wherein torque forces can be applied to the conduit through the nut. An annular nut member is located upon a conduit and the conduit is radially deformed to force the conduit material into engagement with keying surfaces defined upon the nut. Conduit deformation occurs on both sides of the nut for axial positioning thereof, as well as establishing a torque transmitting relationship between the nut and conduit.

Abstract: A line pipe of synthetic material for nominal sizes about 200 mm, especially a waste water pipe, comprising a separate smooth inner pipe and a transversely corrugated outer pipe, the pipes being telescoped into one another in such a manner that the wave troughs of the outer pipe come to lie essentially against the outer surface of the inner pipe, and connection means at the ends for the connection of several line pipes to form a pipeline via a socket joint, whereby the inner pipe has smooth cylindrical end portions projecting above the ends of the outer pipe, with a cylindrical sleeve of a predetermined outer diameter being pushed onto said end portions and fastened thereat by welding and/or adhesion.

Abstract: A device for securing a flexible hose leading from a recreational vehicle sewage holding tank, to the inlet of a campground sewer pipe, and for closing off the inlet of the sewer pipe when not in use. A cylindrical base is permanently bonded to the top of the sewer pipe. A stopper-pin assembly, connected to the base by a light chain, has a stopper which is inserted in the base to close off the pipe inlet when the pipe is not in use, and a pin which is used to secure the flexible hose to the base, by insertion of the pin through two holes in the base so oriented as to allow the pin to pass between adjacent corrugations on the outer wall of the flexible hose.