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: A flexible armored synthetic resin hose for showers, with an extruded inner hose part of thermoplastic or elastomeric material, an extruded outer hose part of thermoplastic or elastomeric material, which is at least partly supported so as to be spaced from the inner hose part, and a reinforcement helix for armoring the hose, said helix being placed between said inner and an outer hose parts.

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: Conventional endotracheal tubes are provided with improved proximal end connector units by which the endo tubes may be attached to breathing equipment or like fluid flow devices in a manner that mitigates interference with operations being performed on patients intubated with the endo tubes, such units comprising a straight, rigid, cylindrical distal end portion, a straight, rigid, cylindrical proximal end portion, a central tubular portion joining the distal end portion to the proximal end portion, the central tubular portion being bendable in an arc of at least 180.degree.

Abstract: A device for the electric measurement of the level of a liquid in a container has a protective tube (1) within which a conductive foil (10) is arranged twisted. The protective tube is a corrugated tube with corrugations (2, 3). These corrugations (2, 3) have interruptions (4, 5, 7, 8). The interruptions lie along two helical lines (6, 8). The conductive foil (10) is pushed with its longitudinal edges (11, 12) into these interruptions (4, 5) which lie on two helical lines (6, 9). In order to permit of easy bending of the entire device, the conductive foil (10) has incisions (13, 14) which extend from both longitudinal edges (11, 12) up to the center of the conductive foil (10).

Abstract: A bellows device having a plurality of recesses and ridges in the direction of expansion and contraction is used for a movable part of a vacuum switch tube. The thickness of an middle part in the direction of expansion and contraction is 1.2 times or more than the thickness of a part placed adjacent the middle part. The middle part has three or more ridges.

Abstract: The sealed shell of a nuclear steam generator is penetrated through a fluid lock by an elongated assembly including an axial fiber optic cable. Fluid pressure chambers within the assembly are selectively pressured to control the movement of the fiber optic head in visual inspection within the shell. Liquid is selectively introduced into the chambers to control buoyancy of the assembly.

Abstract: A tubular core for use in fabricating a cored casing article, the core having its aft end portion provided with a plurality of spaced ramp-shaped elements which extend about the periphery of the aft end portion. The elements permit one-way loading of a shirred casing stick over the aft end and onto the core while resisting the axial growth of the casing stick in an aft direction.

Abstract: Double walled thermoplastic tubes, with corrugated outer walls and smooth inner wall are formed with integral bell sections spaced along the tube. The outer, corrugated wall is formed with a bell section. One of the walls is pierced between the ends of the bell section to allow the escape of air, and the inner wall is pressed outwards into engagement with the bell section of the outer wall.

Abstract: A supplementary hose attached to a main vacuum cleaner hose for carrying an electrical line is seated in a groove formed in the outside surface of the main vacuum cleaner hose. To increase the flexibility of the vacuum cleaner hose in all directions, the wall of the supplementary hose is perforated.

Abstract: The conduit includes a top wall (A) and a base (B). The top wall A has an apex area (10) which is connected with a first corrugated side wall (12) and a second corrugated side wall (32). The side walls having alternating peaks (22, 42) and valleys (24, 44). The peaks have apex ends (26, 46) which are disposed closely adjacent each other at the apex area to define a hinge region therebetween. Disposed along the apex area and on the side wall peaks are a plurality of outward projecting dimples (70, 72, 74) which are severable by a tangentially disposed knife blade to form a plurality of apertures (50, 52, 54). The base B is a flexible sheet of plastic mesh material.

Abstract: A blow molded hollow plastic article having openings at both ends. One of those openings is a main opening and a secondary opening defined by an angled passageway is provided adjacent the main opening. The article is blow molded in a single operation by a method which includes the step of laterally stretching a tubular parison from which the article is to be molded so as to receive a primary mandrel for forming said opening and a secondary mandrel for forming the passageway. Air is introduced into the parison through the secondary mandrel to form the inner end portion of the passageway while the parison is expanded to conform to the shape of the mold.

Abstract: A fire-barrier comprises a composite of three types of fire-retardant materials operable sequentially to combat an increase in temperature, e.g. as occurs on outbreak of a fire, by different methods. A preferred combination of materials is an outer layer of heat reflective material, an inner layer of thermally intumescent material and an intermediate layer of endothermal material between the inner and outer layers.

Abstract: The interior of a tube provided for low temperature operation is shielded from the exterior through a plurality of metal ribbons helically looping around the tube in an intertwined relationship and each carrying a welded on conduit for low temperature liquid whereby one of these conduits serves as a primary or outgoing conductor, and the two others serve as return paths; suitable spacers are provided to position the system in a concentric relation; inner and outermost tubes are preferably corrugated and the immediate interior of the outermost tube is filled with superinsulation.

Abstract: A fluid distribution device particularly useful as a drip irrigation emitter, comprises: a continuous plastic tube for conveying the fluid therethrough; and a plurality of individual plastic sleeves enclosing and fixed to the tube at longitudinally-spaced sections along the length of the tube; each of the sleeves being deformed to define a pressure-dropping fluid passageway between its inner surface and the outer surface of the section of the tube enclosed thereby; each of said tube sections having an inlet opening through the tube wall leading to the interior of the tube, and an outlet leading externally of the plastic sleeve.

Abstract: A corrugated tube consists of a one-piece metallic basic body with corrugations arranged concentrically about the tube axis and one behind the other, which corrugations each have an annular space in the radial zone between the corrugation trough and the corrugation apex. This annular space is closed at its interior by means of two mutually concentric annular wall parts which are seated on one another and are relatively slideable one within the other in the axial direction. On the axial side remote from the associated corrugation the annular wall parts adjoin a radial annular space which is opened towards the tube interior and dimensioned as narrowly as possible as regards its radial and axial width.

Abstract: An elastic shaped article of a laminated construction of at least two layers, comprising (a) a layer of a soft polyvinyl chloride combining polyvinyl chloride with a plasticizer and (b) a layer of at least one thermoplastic elastomer selected from the group consisting of polyester type elastomers, polyurethane type elastomers, and polyamide type elastomers is useful for production of boots, ducts, hoses, tubes, sealing members, covering members, etc. in various transportation machines, construction machines, industrial machines, machine tools, etc. The elastic shaped article whose component layers are particularly laminated by co-extrusion is molded by the blow molding method. When the plasticizer which is combined with polyvinyl chloride to form the soft polyvinyl chloride has an average molecular weight of at least 700, the produced elastic shaped article excels particularly in oil resistance at elevated temperatures.

Abstract: A pliable metallic joint for underwater pipelines laid at great depths, having a bellows-like section of a pliable metal or alloy, which is externally reinforced by a sturdy metal wire coiling positioned in the grooves of said bellows and which is internally reinforced by interlockingly arranged U-shaped rings and an axial undulated circular spring that allow a high degree of deformation and facilitate joining two pipes.

Abstract: A hose construction and method of making same are provided wherein such hose construction comprises a flexible corrugated hose made of polymeric material, a pair of hose connectors fixed to opposite ends of the hose, and a sleeve disposed around the hose and having opposite end portions wherein the sleeve is fastened to the hose only at its opposite end portions and the sleeve serves to improve the fluid pressure resistance and external wear resistance of the hose while keeping its flexibility substantially intact.

Abstract: A radially compliant acoustic line array hose with improved toughness and wear resistance, suitable for use in towed acoustical line array sonars. The hose comprises a long extruded cylindrical tubing of a soft flexible grade of geophysical, plasticized polyvinyl chloride material with longitudinal ribs of a stiffer, harder grade of geophysical plasticized polyvinyl chloride material located at or near the tubing surface, and spaced uniformly around the circumference of the tubing. The ribs are melt-bonded to the softer thermoplastic material while each is in their respective melt stages during the extrusion process.

Abstract: A heat transfer device having an augmented surface is disclosed. The device comprises a base wall of heat conductive material having a plurality of pyramid-fins formed integrally with the surface of the base wall. The pyramid-fins are regularly spaced apart in the range of about 80-500 pyramid-fins per square inch and have a height in the range of 0.015 to 0.040 inch. The base wall is preferably a cylindrical tube and the pyramid-fins are formed as a knurled diamond pattern around the outside periphery of the tube.

Abstract: A rigid, molded fiberglass duct having an integral bendable elbow comprised of two sections of cured fiberglass securely bonded to a corrugated metal-foil sleeve. The method of manufacturing the rigid bendable duct is by sliding a corrugated metal-foil sleeve on to a mandrel and then wrapping the ends of the sleeve with uncured fiberglass. The area of the uncured fiberglass overlapping the corrugated, bendable sleeve is compacted by means of a collar which fits around the sleeve and the fiberglass and compresses the fiberglass into the corrugations of the sleeve. In order to enhance the bond, protusions may be provided in the overlapping area of the sleeve, such as by cutting the corrugated sleeve and bending it up to form tabs.

Abstract: A tubular jacket of flexible plastic film is telescoped over one of two spaced coaxial mandrels extending toward each other, duct end collars are secured respectively on the mandrels, opposite ends of a flexible helically reinforced core are strapped respectively to the collars, a flexible insulation blanket is wrapped around the core and taped adjacent opposite ends, the jacket is pulled over the blanket, the collars are released, and the collared duct is removed from the mandrels.

Abstract: Flexible electrical shielding conduit and method for making same wherein the conduit comprises multiple layers including a flexible conduit tubing outer layer, an electrical shielding layer disposed within the tubing and in contact with the conduit layer, and a woven retaining layer inside the shielding layer, said woven retaining layer expanding radially outwardly when compressed axially continuously forcing the shielding layer into contact with the conduit tubing to provide an unobstructed passageway therethrough. An alternative embodiment and the method for making same wherein the electrical shielding layer and the retaining layer are combined to form an integral inner layer having the properties as described above.

Abstract: Flexible production tubing is wound about a reel for easy and convenient transport to and from a well site. A submersible pump is attached directly to the end of the flexible tubing and is lowered through the well casing to a producing formation. Insertion and withdrawal of the flexible tubing is accomplished with a hydraulically powered drive sprocket assembly mounted above the well head equipment. The flexible tubing is reinforced by striker plate assemblies which are engaged by the teeth of the drive sprocket, thereby providing positive traction for insertion and withdrawal without damaging the flexible core. The flexible production tubing includes a high strength injection core, a tubular production conduit embedded within the core, and a series of striker plate assemblies partially embedded within the core.

Abstract: Apparatus for continuous extrusion of tubular sections of thermoplastic material having a smooth inner surface and an annularly finned outer surface defined by alternating ribs and grooves. The apparatus comprises a die assembly made up of an outer die part and an inner die plunger. Two sets of chills define in combination a casting cavity having alternating grooves and ribs both having circular cross sections. The radius of the cross section of the grooves is smaller than that of the ribs, preferably the radius of the ribs ranges between 1.25-1.35 times greater than the radius of the grooves. For their displacement along closed loop paths the chills are provided with racks and their back sides are in meshing engagement with gears. A smoothing mandrel is provided in line with the die plunger and is cooled by a cooling fluid.

Abstract: A sterile hose set for use in apparatus for artificial respiration and for respiration-assisting and aerosol therapies consists of a tubular container, which is totally enclosed and internally sterile and has been made in one step from plastic material by blowing with sterile air. The hose set consists of a plurality of successive hose sections, which differ in length and are smooth-surfaced or pleated and are joined in a unit. Each of said hose sections is provided at both ends with special adapters. The terminal hose sections are closed at one end and provided at the other end with a special adapter. Disconnects are provided between the hose sections and at the ends of the hose set.

Abstract: The invention provides a hose that withstands a vacuum which is considered to be approximately two to three times greater than the vacuum withstood by the best known previously available pliable convoluted semirigid plastic hoses of comparable designs. To fabricate the hose, a bobbin of wire stock is unwound, with the wire preferably being pulled off the end of the bobbin. The wire is then looped around a spool to form it into a spiral or coil having a preset diameter which is proportionately smaller than the diameter of a preformed, semirigid convoluted plastic hose. While the pulled wire is still substantially extended, it is taken up by being rolled upon the plastic hose, thereby snapping the preset formed wire spiral into the spiral convolutions formed in the surface of the hose. If desired, the spiral or coil might be pulled off the end of the samller diameter spool to impart a twist thereto.

Abstract: A tubular bellows element for fluids is provided which has concentric corrugations. The corrugations include flanks separated by spaces which narrow towards inner ends of the corrugations. The inner corrugation ends have a conical shape, and act as scales to increase the degree to which the ends of the bellows element can be moved with respect to each other. The inner ends also serve to provide an essentially smooth inner surface for the bellows element, minimizing both flow disturbance and the creation of turbulence.

Abstract: Thin-walled metal duct particularly useful for heating and air-conditioning purposes is usually made by grooving, spiral wrapping, and seaming strips of thin metal sheet. The resultant tubular form provides the necessary rigidity to resist collapse of the tubular form. In the past, at least one end of the ribbed tubular ducts have been reformed to permit the ducts to be joined together. The end reforming techniques of the past have resulted in reformed ends having insufficient rigidity and strength to resist the abuse the ducts frequently receive in shipping, storing, handling, and installation.The present product, method, and apparatus provide a ribbed thin-walled tubular duct having reformed ends with rigidity and strength superior to the prior art products. This achievement is accomplished in the present invention by moving more metal into the end portion of the duct prior to reforming the end portion, thus reinforcing the end portion of the duct.

Abstract: A flexible plastic nipple for coupling a sprinkler head to a sprinkler system pipeline. The nipple includes an elongated plastic tube having a resilient center section and a pair of end sections. The center section has a uniform set of annular undulations which provides both rigidity and flexibility to the nipple. Each end section includes a rigid portion, a flexible threaded section, and a snub portion for mating the nipple with a connector fitting on the sprinkler head or pipeline. The threaded portions have sufficient flexibility to prevent rupturing or stripping when a force is transmitted to the nipple. In addition, the center section will bend before the force transmitted to the threaded portions becomes excessive and will rebound to its original position when the excessive force is removed.

Abstract: A hose construction and apparatus for and method of making such hose construction are provided wherein the hose construction comprises a corrugated outer tube made of polymeric material and having alternating projections and recesses with the recesses having inwardly facing convex surfaces and an inner tube made primarily of polymeric material and having smooth inside and outside surfaces with the outside surface being bonded against the convex surfaces and wherein the inner tube has at least one longitudinally extending polymeric portion comprising same which has electrically conductive particles embedded therein in which the polymeric portion serves as a matrix for the particles and with the polymeric portion being heat fused to the convex surfaces.

Abstract: A flexible pipe includes an elastic pipe body in corrugated form and including alternate large and small radius portions. A ring is mounted within one of the large diameter portions of the interior of the pipe body. An elongated flexible and deformable shaping member is secured to the ring and extends throughout the interior length of the tube body.

Abstract: In the manufacture of double-wall plastic tubing in which the outer wall has transverse corrugations and the inner wall is smooth, in the case of annular transverse corrugations the air pressure between the two walls cannot be balanced with the external air pressure, resulting in deformations of the inner tube. To permit an equilibrium of pressure before the inner wall hardens, openings are pierced in the outer wall or openings are produced between the two walls for communication between the inner chambers of the transverse corrugations. After the hardening of the inner tube, these openings are reclosed by fusion.

Abstract: An elongated cylinder is essentially comprised of a continuous side wall with a narrow weak wall segment along the length thereof for fracturing by the application of a small force to permit access to the interior of the cylinder along the fractured side wall. The weak side wall segment is in the form of a very thin web section produced by grinding or in a molding operation which may additionally include the filling of the hollowed area of the side wall with a dissimilar material. The article is used for cable placement, varmint protectors for tree trunks, protectors for wire harnesses, protectors for cable splices, and a mold for concrete.

Abstract: The device comprises a flexible, expandable hose which has a coupling at one end for mating with the toner hopper of either of a photocopy machine or a computer print-out machine, the other end of the hose having a coupling for mating with the neck of the toner canister so that toner may be loaded from the canister into the hose from outside of the machine which uses the toner, the toner canister is then removed from attachment to the hose, the hose is capped and the hose is compressed, whereby the toner is loaded into the machine with minimal spillage.

Abstract: A high strength pipe comprising a corrugated metallic tube defining a series of annular troughs therewithin and a resinous material lining the interior surface to fill the troughs and create a smooth and corrosion resistant surface.

Abstract: A support sheathing for use, for example, on tubular sausage casings, the sheathing forming a container for a cylindrical hollow rod made of a shirred tubular casing, the sheathing comprising a heat-shrinkable, net-like, plastic tubular material, the sheathing surrounding the tubular casing about its outer cylindrical surface and forming integral end portions for covering end portions of said tubular casing, said integral end portions of the sheathing having annular openings therein surrounded by an annular bead, whereby the end openings of the sheathing permit access to the interior cavity of the hollow rod.

Abstract: A flexible hose construction formed by the non-mandrel extrusion of an inner plastic liner having plural axially extending dovetail shaped projections, extrusion of a rubber support member over the liner in interlocking engagement, winding a yarn reinforcement over the relatively stiff composite core structure, extrusion of a rubber or thermoplastic elastomeric cover thereover and vulcanization of the structure.

Abstract: A flexible sheet seal for joining first and second spaced apart members in waterproof and airtight sealing engagement. The sheet seal has gripping members on at least one end thereof for releasably securing the end in sealing engagement with one of the members. In one application, the seal is a hollow bellows seal for joining a window opening in a vehicle cab to an aligned opening in a pickup cap mounted on the vehicle.

Abstract: Disclosed is a foldable arched conduit suitable for use as drain tubing, culverts and the like. The conduit has the cross section of a parabolic arch with a flat base. The arched portion of the conduit comprises a pair of rigid corrugated plastic walls jointed at the apex area by a hinge. The base is constructed from a flexible sheet material which may contain apertures for liquid ingress and egress. For shipment, the rigid walls are folded inward about the hinge with the flexible sheet being folded between the rigid walls in order to present a generally flat configuration. After folding, the conduit may be conveniently rolled or length placed in parallel stacks for reducing the storage and/or shipping space required. At installation, the conduit may be unrolled along the installation site and then caused to expand into its unfolded shape.

Abstract: An elongate flexible tubular sheath has a longitudinal slit therethrough from end to end. The sheath is placed over a conduit, having an outside diameter not smaller than the inside diameter of the sheath. Subsequently, the sheath is tightened about the conduit and the edges of the slit forced together in response to helical twisting of the sheath. Means are provided for retaining the sheath in the helically twisted position.

Abstract: A tube of thermoplastic material having a flexible zone intermediate the ends thereof which may be flexed without substantial springback. The flexible zone comprises a series of circumferential grooves having an annular floor from which two opposed groove sides convergently extend.

Abstract: Vibration absorbing connector for use in high pressure fluid piping systems such as the refrigerant lines in an automotive air conditioning system incorporates a thin bellows member whose ends are restrained against axial movement by a restraining means such as a plurality of axially extending flexible cables or a braided metal sleeve which surrounds the bellows member. A molded-in-place elastomeric layer fills in the external bellows corrugations to prevent their deformation under load and encapsulates the restraining means. The design permits a 3 inch long bellows having a 0.005" wall thickness to perform as well as a 7 inch long bellows having a 0.020" wall which has a conventional configuration under internal fluid pressures that would collapse the thin wall bellows corrugations in the absence of the elastomeric layer.

Abstract: The invention provides a hose that withstands a vacuum which is considered to be approximately two to three times greater than the vacuum withstood by the best known previously available pliable convoluted semirigid plastic hoses of comparable designs. To fabricate the hose, a bobbin of wire stock is unwound, with the wire preferably being pulled off the end of the bobbin. The wire is then looped around a spool to form it into a spiral or coil having a preset diameter which is proportionately smaller than the diameter of a preformed, semirigid convoluted plastic hose. While the pulled wire is still substantially extended, it is taken up by being rolled upon the plastic hose, thereby snapping the preset formed wire spiral into the spiral convolutions formed in the surface of the hose. If desired, the spiral or coil might be pulled off the end of the smaller diameter spool to impart a twist thereto.

Abstract: A vacuum cleaner hose construction having integral electrical conductors and method of making same are provided wherein such hose construction is comprised of a convoluted tube having alternating outwardly convex crests and outwardly concave troughs with a plurality of cutouts being provided in the crests extending completely through the wall thickness thereof and aligned along the length of the tube to define at least one slot construction for receiving the electrical conductors therewithin and a sleeve is disposed around the tube and electrical conductors with the sleeve holding the electrical conductors in position while defining a fluid-tight outer layer for the hose construction.

Abstract: A shutoff device comprising a substantially tubular-shaped housing within which there is fixed at its ends an elastic hose body. The hose body extends in the lengthwise direction of the housing and forms a closable throughpassage which flow communicates an inlet opening of the housing with its outlet opening. The inner wall of the housing and the hose body bound a substantially ring-shaped pressure compartment into which opens a conduit connection arranged at the housing. The hose body has a number of folds which extend essentially parallel to one another.

Abstract: A corrugated metal tube are provided wherein such tube has a central longitudinal axis and comprises a single-thickness member having integral corrugations and opposed edges and the member is in tubular form with the corrugations defining substantially annular alternating radially outwardly facing projections and channels with the opposed edges being disposed immediately adjacent each other and each of the edges extending along a mean path substantially parallel to the axis with a weld fixing the edges together.

Abstract: An adjustable riser for a toilet tank is formed of a pair of mutually telescoped members slidably sealed to each other and readily locked in any one of a selected number of longitudinally adjusted positions by means of a number of tapered fingers having projections that are pressed into one of a series of grooves in the inner member by a threaded lock nut.

Abstract: The sewer connector comprises an axially compressible hose and a storage container for maintaining the hose or any portion thereof in the compressed state. The container consists of a pair of semi-cylindrical housing portions having soft foam rubber strips which are connected to the inner periphery of the axial ends of each housing section. Slip rings are also provided for maintaining the two housing sections in radial opposition about the flexible hose thereby forming a cylindrical housing with the rubber strips holding the flexible hose in its compressed state.