Abstract: A fastening element for friction welding onto a planar workpiece includes a nut head, a through-bore extending at least locally within the nut head, a friction welding face on one end side of the nut head, and a cutting device for introducing a drilled hole into the workpiece on the one end side of the nut head having the friction welding face.

Abstract: An oscillating piston pump including: a first hollow tubular body in which a piston moves; a second hollow tubular body extending around the first hollow tubular body, carrying a solenoid that controls the movement of the piston, the first tubular body and the second tubular body forming a one-piece structural element.

Abstract: An isolator for an aircraft fuel tank configured to separate an electrically conductive internal panel of the fuel tank from an electrically conductive pipe that passes through the panel. The isolator includes: a plurality of first attachment points for attaching the isolator to the panel, a plurality of second attachment points for attaching the isolator to the pipe, and an aperture defined by an outer wall and extending from a first side of the isolator to a second side of the isolator. The aperture is configured to receive the pipe in use, wherein the isolator is formed of a non-electrically conductive material.

Abstract: The disclosed apparatus, systems and methods relate to the design principles for forming a welded joint between two sections of tubing or pipe. The material at the end portion of a first section of tubing to is folded inwardly to create a support surface. This support surface improves the ability to weld light gage material with traditional arc welding and it creates conditions to allow brazing to be as strong as traditional arc welding by using A shaped piece of filler material which is located at the intersection between the support surface of the first section of tubing and a side wall section of the second section of tubing. While holding together the first and second sections of tubing with the filler material, heat is applied at the intersection at a temperature and for a duration sufficient to melt the filler material and form the 3t joint.

Abstract: A manhole rehabilitation system where in one example an existing cross-pipe is exposed and a manhole base and riser are cast around and above the existing cross pipe to form a manhole. In one example an FRP base liner and FRP riser liner are placed before casting in place. In one example casting is made of an aggregate. In one example, a collar and manhole cap rest upon the casting, and are supported thereby such that the liner need not be structural. In one example an existing pipe or manhole forms the outer surface of the casting. In one example shoring is placed and used as the outer surface of the casting.

Abstract: Provided is a robot system including a robot including at least one sensor that detects an applied external force and a controller that controls the robot. The controller changes an operation mode of the robot when performing lead-through teaching in accordance with a position and a pattern of the external force detected by the sensor.

Abstract: An exhaust assembly for a vehicle is disclosed, which includes a resonator including an inlet adapted for fluidly connecting to an exhaust manifold, and a closed end at an end of the resonator opposite the inlet; and a turbocharger passage extending from the resonator between the exhaust manifold and the closed end, the turbocharger passage defining an outlet. An exhaust system, a power pack, and the vehicle including the exhaust assembly are further disclosed.

Abstract: The technology disclosed relates to motion capture and gesture recognition. In particular, it calculates the exerted force implied by a human hand motion and applies the equivalent through a robotic arm to a target object. In one implementation, this is achieved by tracking the motion and contact of the human hand and generating corresponding robotic commands that replicate the motion and contact of the human hand on a workpiece through a robotic tool.

Abstract: A heat-insulated box for insulating parallel-slide valves includes multiple sections each including an outer protective steel envelope with a heat insulation coating on an inner surface. A number and configuration of sections is determined based on geometric parameters of the insulated valve. Some sections include two semi-cylindrical segments rigidly coupled together and oriented in mutually perpendicular directions such that one segment can be installed on the valve and one segment can be installed on the pipeline. The box also includes stiffeners at the junction of the two semi-cylindrical segments. The sections include shock-absorbing sealing gaskets made of cellular rubber substance to ensure a tight seal of the box. The box includes a locking mechanism for coupling the sections together.

Abstract: Provided is a method that is for attaching a filler pipe. The method for attaching a filler pipe attaches a filler pipe to the aperture of a fuel tank with an attachment member therebetween, and is characterized by containing: a fitting step for fitting the tubular attachment member to the inside of the aperture of the filler pipe; a contact step for contacting, to the surface at the periphery of the aperture of the fuel tank, a first flange protruding outwards in the radial direction from the outer peripheral surface of the attachment member, and a second flange protruding outwards in the radial direction from the outer peripheral surface of the filler pipe; and a welding step for welding the first flange and second flange to the surface.

Abstract: A register boot which has a duct opening at one end and a register opening at the other end that protrudes through a hole in a structure that is made of flexible material that is deformable and also restores itself to the natural shape of the register boot. Because the register boot is deformable it is able to pass through the hole in the structure. The register boot then restores itself to its original shape. The register boot as described allows for a method of installation that allows a single person to install the register boot.

Abstract: A method to stimulate tree sap self-ejection from a tree through a plurality of spouts by wrapping a tree with a metal liner and a flexible tube, adding an insulation shell then heating or chilling a portion of a tree trunk by flowing heated or chilled a freeze resistant fluid through the flexible tube. At least one fluid pump, heat exchanger and controller are used to modulate temperature based on forest information and weather historical information to create a more efficient sap collection and processing method.

Abstract: An interlocking system of tubular members is provided for support of conveyors and mezzanines, each tubular member having cutouts and slots for assembly with other of the tubular members to form elbow joints, tee joints and cross joints, and stiffener brackets to reinforce the interlocking joints to form a strong support structure without the need for welding. A mezzanine conveyor assembly is also provided that includes a support structure constructed of non-welded interlocking tubular members reinforced with stiffener brackets, with a mezzanine/platform and at least one conveyor supported on the support structure.

Abstract: An interlocking system of tubular members is provided for support of conveyors and mezzanines, each tubular member having cutouts and slots for assembly with other of the tubular members to form elbow joints, tee joints and cross joints, and stiffener brackets to reinforce the interlocking joints to form a strong support structure without the need for welding. A mezzanine conveyor assembly is also provided that includes a support structure constructed of non-welded interlocking tubular members reinforced with stiffener brackets, with a mezzanine/platform and at least one conveyor supported on the support structure.

Abstract: The present invention is directed to a magnetic duct cleaning hose clamp for attaching an airflow hose to a HVAC duct to be cleaned. The improved duct cleaning hose clamp includes: a planar clamp base; a plurality of magnets arranged around the periphery of the back surface of the clamp base; a compressible sealing member located between the magnetic attachment pads on the back surface of the clamp base; at least one handle portion extending from the front surface of the clamp base; a duct cleaning hose mounting portion protruding from the front surface of the clamp base; and a duct cleaning hose mounting portion defining an airflow aperture which is in fluid communication with a remote HVAC duct cleaning base unit. The present invention further includes magnetic duct access door of similar construction to the clamp. The magnetic access door provides for frequent access to a variety of different kinds of duct.

Abstract: A dome for a rotor comprising a cap extending radially from an axis of rotation in elevation towards a periphery and in azimuth over 360 degrees, the cap extending in thickness from a bottom face towards a top face above the bottom face. The dome includes at least one slot extending between the periphery and the axis of rotation in elevation, each slot passing right through a thickness of the cap by extending in elevation from the bottom face to the top face.

Abstract: In some embodiments, a clothes dryer vent quick coupling apparatus may include a male element and a female element which may be removably coupled together. The male element may include a body having a male vent aperture in fluid communication with a first hose coupling, a male inlet surface, a male outlet surface, and a handle. The first hose coupling may be disposed on the male inlet surface and the male vent aperture may extend through the body between the male outlet surface and the first hose coupling. The female element may include a receiver having a channel with a female inlet surface and a female outlet surface. A female vent aperture may be in fluid communication with the female outlet surface and may extend from the channel through the receiver. Optionally, the handle may comprise a hollow cavity which may be in fluid communication with the male vent aperture.

Abstract: In a refrigerant circuit component or valve device, the present invention projection-welds a connector to a cap member and prevents intrusion of spatter into a refrigerant circuit. A-cylinder section in which an inside hole of the connector is open is inserted in an inside hole formed in the center of the cap member. The area between the A-cylinder section and a projection of the connector is used as a spatter generation space. The projection of the connector abuts against the cap member and is projection-welded to form a welded part. The open end of the inside hole of the A-cylinder section is crimped to pressure-join the open end to the open end of the inside hole of the cap member. Spatter is sealed inside the spatter generation space. A portion of the surface layer to which the generated spatter adheres may be removed by machining to provide a spatter-removed structure.

Abstract: A universal tuning knob for stringed instruments is presented. The invention consists of a knob with an elongated and threaded cylindrical shaft. The shaft includes a lumen sized to receive the machine head post of any stringed instrument. The outside perimeter of the knob is configured for grip. The threaded cylindrical shaft includes a slot on its side wall to receive and retain a bushing. The bushing includes a second slot that can be notched (i.e. sized) to fit and lock the machine head post of any stringed instrument. A sleeve lock with internal threads is threaded onto the threaded cylindrical shaft of the knob thereby retaining the bushing. An optional second lumen on the head of the knob is configured to receive a mounting screw.

Abstract: Embodiments of the invention provide a removable clamp for coupling an adaptor to a pipe delivering a solution, the removable clamp having a button in order to maintain an angular relationship between the adapter and the pipe. Other embodiments of the invention provide a fluid delivery system having clamps with buttons coupling a tee adaptor to sections of a boom in order to maintain an angular relationship between the sections of the boom.

Abstract: An open roof construction for a vehicle having a roof opening in a fixed roof having a roof edge, defining the roof opening and protruding in a downward direction and further comprising a stationary part, at least one panel to open and close the roof opening. The panel is movably supported by an operating mechanism, guided in a guide rail of the stationary part, extending along at least a longitudinal side of the roof opening. The panel is movable in vertical and longitudinal directions with respect to the roof opening. The stationary part is provided with a sealing assembly comprising a first seal part capable of sealing the panel towards the fixed roof, and a second seal part capable of sealing the stationary part against an inner part of the fixed roof. The first seal part is slidably adjustable with respect to the second seal part in vertical direction.

Abstract: A hopper tee for redirecting the flow of material from one passage to another passage includes a radius providing a transition between the passages. A port at the exterior of the radius includes an upwardly-open cavity having a bottom wall disposed within the radius and forming a sacrificial wall extending between the bottom wall and the inner surface of the radius. The cavity provides an indication that material moving through the tee has worn the wall of the radius by the creation of a passage between the interior of the tee and the cavity and expelling material through the passage to the exterior of the tee. A plug may be secured within the cavity allowing a user to continue to use the tee until the tee is rotated or replaced. The radius may include a thickened wall for providing added structural support and sacrificial material.

Abstract: A vacuum operated brake booster, comprises a casing including a base defining at least one hole, and at least one tube extending through the casing and configured to receive a screw for fastening the brake booster to a wall of a passenger compartment of a vehicle. The tube defines a rear end with a peripheral fold forming a rear groove, and an extension extending beyond the rear groove, the extension defining a first outer edge and being configured to be folded toward an outer side of the tube to form a crimping lip. The at least one hole is bordered by a recessed ring having a form complementary to that of the rear groove of the rear end of the at least one tube. The extension is configured to be folded above a second outer edge of the recessed ring and blocked in the groove.

Abstract: An apparatus for determining or monitoring a process variable of a medium in a pipeline, which has a predetermined inner cross section, comprising a sensor and a T-shaped adapter. The adapter has a first portion and a second portion arranged essentially perpendicular to the first portion. The first portion has essentially the same inner cross section as the pipeline and the sensor is so arranged in the second portion that the end face of the sensor facing the medium is flush with the inner surface of the first portion of the adapter.

Abstract: Provided is a water discharge structure for a sunroof device, the water discharge structure being capable of suitably preventing rainwater, etc. from penetrating a stationary roof. A water discharge structure for a sunroof device is configured so as to comprise: a panel body for closing an opening formed in the stationary roof of a vehicle; frame members arranged along edges of the stationary roof and provided with water discharge grooves; brackets mounted to the frame members and supporting the panel body; and water discharge guide plates disposed between the panel body and the brackets and conducting rainwater etc., which have entered along the seal surfaces between the panel body and the edges of the stationary roof, to the water discharge grooves.

Abstract: Pliable air ducts with anti-condensation nozzles are disclosed. An example system includes a tubular duct comprising a pliable wall dividing an interior of the tubular duct from an exterior of the tubular duct. The system includes an outlet member to be attached to the pliable wall. The outlet member defines a main air passageway with a first flow resistance therethrough and places the interior of the tubular duct in fluid communication with the exterior of the tubular duct. The system includes a secondary air passageway with a second flow resistance therethrough. The secondary air passageway is defined by at least one of the outlet member or the pliable wall and extends from the interior of the tubular duct to the exterior of the tubular duct to define an airflow path proximate the outlet member. The second flow resistance is significantly greater than the first flow resistance.

Abstract: A blanking panel is provided for blocking an aperture in a rack for mounting multiple hardware components. The panel includes: a frame having a first pair of parallel sides connected orthogonally to a second pair of parallel sides, where at least one of the pairs of parallel sides is adjustable in length; an attachment means provided on at least one of the pairs of parallel sides for removable attachment of the blanking panel to the rack; and a screen formed of a flexible and stretchable material extending between at least one of the pairs of parallel sides where the flexible and stretchable material stretches as the pair of parallel sides are moved apart thereby blocking the aperture.

Abstract: A robot controller for easily moving a desired axis of a robot by applying a force to a front end of the robot, and a robot system including the robot controller. The robot controller has: a force measuring part which measures a force applied to the front end; an operation force calculating part which calculates an operation force for moving each axis based on the measured force; an operation commanding part which outputs a command for moving the robot; and an operation axis specifying part which specifies an operation axis to be moved in response to the force, and determines a direction of movement of the operation axis as a function of a direction of the force. When two or more operation axes are specified, the operation axis specifying part determines as to whether or not each operation axis can be moved, depending on a status of the movement operation.

Abstract: A hydraulic cylinder has a main body portion with a piston bore extending in a longitudinal direction of the main body portion from a first end to a second end of the main body portion. A first cylinder mounting bracket extends in the longitudinal direction and has at least one aperture disposed along the length of the bracket for locating and securing the hydraulic cylinder to a structure. A manifold mounting portion extends in the longitudinal direction of the main body portion and has a first fluid passageway extending in the longitudinal direction from the first end to the second end. Thus, a manifold can be mounted to the manifold mounting portion at one of a plurality of different positions and/or orientations along the length of the hydraulic cylinder while allowing fluid communication between a fluid port of the manifold and the fluid passageway of the manifold mounting portion.

Abstract: A connecting arrangement connects an end of a fluid conduit to an assembly. The connecting arrangement includes a stub (1) having a flow opening (11) for receiving the fluid conduit at one end of the flow opening (11) as well as a flange (2) having a first opening (9) for receiving the stub (1) and a second opening (10) for fastening to the assembly. The stub (1) is inserted into the first opening (9) and connected to the flange (2) in a material-to-material manner. The flange (2) has in the region of the connection a groove (4) that extends in a circumferential direction.

Abstract: A retractable clothes dryer vent includes a support, a duct coupling, a dryer vent hose, a dryer exhaust coupling, a first retraction guide assembly, and a second retraction guide assembly. The duct coupling is mounted in the support and has a first end, a second end opposite the first end, and an opening extending through the support. The dryer vent hose has a first end extending from the first end of the duct coupling and a second end opposite the first end. The dryer exhaust coupling extends from the second end of the dryer vent hose. The first retraction guide assembly has a first end mounted to the support and a second end anchored to the dryer exhaust coupling. The second retraction guide assembly has a first end mounted to the support and a second end anchored to the dryer exhaust coupling.

Abstract: The invention relates to an arrangement for sealing line interfaces in a motor vehicle in which lines from an engine compartment of the motor vehicle are led into a vehicle interior, wherein the engine compartment is separated from the vehicle interior by a partition which has an opening, through which the lines are led, and the opening is closed on the vehicle interior side by a seal, which is fastened to a functional unit arranged in the vehicle interior. In order to enable a reliable sealing function despite the assembly tolerance to be compensated, a flange of the functional unit that bears the seal can be moved relative to the functional unit, or the seal is movably arranged on the flange, which is rigidly fastened to the functional unit.

Abstract: A fitting assembly containing a fitting, a first plate and a second plate are provided. The first plate has a first plate wall and a first-plate aperture, the first-plate wall being positioned along an edge of the first plate defining the first-plate aperture. The second plate has a second-plate wall and a second-plate aperture, the second-plate wall being positioned along an edge of the second plate defining the second-plate aperture. The fitting assembly having the fitting being sandwiched between the first plate wall and the second plate wall. Also disclosed is a heat exchanger having the fitting assembly as described herein, and a method of forming the fitting assembly.

Abstract: A column assembly for supporting a floating roof used with a storage tank for containing a volatile fluid, including an inner pipe, an outer pipe securable to the floating roof to extend below and generally perpendicular to the roof, the outer pipe surrounding and being movable axially on the inner pipe with a generally annular space defined between them, a pin extendable transversely through the overlapping walls of the inner and outer pipes to releasably fix the axial position of one pipe relative to the other, and a cylindrical sleeve seal having an upper part to slidably engage the inner pipe outer surface, a lower part bore surface to engage the top end outer surface of the outer pipe, and a radially inward extending rib situated axially between the upper and lower parts and extending transversely across and closing the top end of the annular space between the pipes.

Abstract: A waterproof sleeve coupling for use in a partition for preventing liquid from leaking through a penetration in the partition either adjacent to or through the sleeve coupling. The sleeve coupling has a water stop constructed of a resilient material and mounted in sealing contact with a sleeve so that a waterproof seal is formed between the water stop and the sleeve. The sleeve coupling optionally includes an extension coupling and an extension sleeve mounted on the sleeve. When the sleeve coupling is mounted in the partition, the extension sleeve extends beyond the surface of the partition to prevent liquid on the surface of the partition from leaking into the passageway of the sleeve coupling.

Abstract: An apparatus and method for monitoring and sampling air quality in an interior space of a wall are provided. The apparatus includes a housing configured to attach the apparatus to an electrical outlet in the wall, and a gasket configured to provide a seal between the housing and the electrical outlet. The apparatus further includes an air moving unit configured to draw air from the interior space of the wall into the apparatus, and a sensor configured to monitor and sample the air quality in the interior space of the wall. The gasket is configured to directly attach to an electrical plate cover of the electrical outlet or to the wall.

Abstract: A high efficiency take-off fitting allows conditioned air from a rectangular cross-section main duct to be smoothly transferred into a circular cross-section branch duct.

Abstract: A structural component with a tubular section, particularly a structural component of a fluid line, has at least two materials with different stiffness and/or creeping strength, wherein the materials include thermoplastic synthetic materials and wherein the material having the greater stiffness and/or creeping strength is embedded in the other material. The tubular section has a continuous annular surface which extends coaxially with the longitudinal center axis of the structural component and has the same material which has been injection molded over the annular surface in a predetermined quantity ratio relative to the outer material, or between 40% and 100% of the annular surface are composed of the same injection molded material and are distributed in uniform spacings in circumferential direction of the annular surface.

Abstract: Fittings with redundant seals for aircraft fuel lines, fuel tanks, and other systems. A representative fitting includes a first member having a flange and a barrel. The barrel further includes a passageway. A first flange seal is positioned at a face of the flange and can be sealably coupled to a surface, for example, a tank wall. A second flange seal is disposed outwardly from the first flange seal to seal against the surface. The fitting further includes a second member positioned within the passageway of the barrel. The fitting further includes first and second barrel seals positioned between the barrel and the second member.

Abstract: A connector assembly has a hollow first connector and a hollow second connector. The first connector has an engaging block. The second connector has an opened connecting end, a guiding groove, a resilient tab cavity, an escaping segment and a resilient tab. The resilient tab cavity is defined in the second connector at a side of the guiding groove opposite to the connecting end and communicates with the guiding groove. The escaping segment is formed on and protrudes from an outer surface of the second connector at a position between the guiding groove and the connecting end of the second connector and is hollow to define an escaping space communicating with the guiding groove. The resilient tab is formed on and protrudes from an inner surface of the resilient tab space and has a free end extending into the guiding groove.

Abstract: A pipe joining device for forming a junction in pressurised and rehabilitated pipes between a first pipe and a branch pipe, the pipe joining device including a substantially rigid body at least in part of thermoplastic, the body including a first pipe sealing portion adapted to form a seal with the first pipe and a branch pipe sealing portion adapted to form a seal with the branch pipe.

Abstract: The invention relates to a pressing device for a casting pipe at the spout of a metallurgical container, wherein the pressing device is provided with spring-loaded pressing elements (2) that can be pressed against guide surfaces (10) of a casting pipe (1). The casting pipe (1) comprises a tubular part (4) and an upper plate (5). The guide surfaces (10) are arranged on the underside of the plate (5) on both sides of the tubular part (4) and are directed downward at an angle. They form a plate cross-section that is tapered downward. The pressing elements (2) are each provided with a head (2a) that is convexly curved in the adjustment direction (A) of the casting pipe (1) and can be pressed against a guide surface (10) of the casting pipe (1), which is curved in the longitudinal direction of the pressing element or in the adjustment direction (A). Thus, the compressive forces exerted by the pressing pins are optimally transmitted, more toward the casting pipe opening and therefore acting more evenly.

Abstract: A water filtration apparatus has at least one tank in fluid communication with a conduit through at least one aperture in a wall. Each tank uses filter blocks to support the filter medium and to direct the filtered water to the conduit via the aperture. An end plate for the filter block is provided, the end plate being adapted to seal against a free end of the filter block. The end plate also provides apertures for fluid flow into and out of the filter block, and a device for receiving a sealant to provide a seal between the end plate and the wall. The end plate improves the installation of the apparatus, and the sealant improves the reliability of the seal round the apertures, which in turn improves the efficiency of a backwash operation used to clean the filter medium.

Abstract: A connecting assembly that can be coupled to a tubular wall is provided. The assembly includes a connecting fitting having a tubular coupling portion, an abutment ring, and an arcuate-shaped tubular body. The abutment ring is disposed around an outer surface of the tubular coupling portion a predetermined distance from a first end of the tubular coupling portion. An end of the tubular body is coupled to a second end of the tubular coupling portion. The assembly further includes a retaining member having a ring-shaped portion and first and second finger portions extending from the ring-shaped portion. The arcuate-shaped tubular body of the connecting fitting is received through a central aperture of the ring-shaped portion such that the ring-shaped portion is slidably disposed on the tubular body of the connecting fitting and is further slidably disposed against the abutment ring.

Abstract: A fitting coupler is provided configured for coupling a planar fluid conduit and a fluidic device. The fluidic device comprises a cavity, a device conduit, and a mouth where the device conduit opens into the cavity. A contact pressure element is configured for sealingly pressing the planar fluid conduit to the mouth, so that a conduit opening of the planar fluid conduit opens into the mouth.

Abstract: A gas supply coupling is disposed within and extends through an opening of a combustion chamber for a water heater. The coupling includes a fitting which is a relatively inexpensive stamped component. A stepped tubular connection extends from a plate and includes a first portion having a first diameter which necks down to a second portion having a second diameter less than the first diameter. The stepped tubular connection receives a gas supply tube into the first portion and a gas supply line over the second portion. The tubes are braised to the stepped connection. Other gas supply couplings include a machined fitting and a direct connection between a gas supply tube and a gas supply line in which the gas supply tube itself provides for both the seal to the shield and the connection to the gas supply line.

Abstract: A mounting plate connects a first air channeling apparatus and a second air channeling apparatus. The first air channeling apparatus includes an air outlet and a flange projecting outward from the air outlet. The mounting plate is mounted to the second air channeling apparatus and comprises an opening, a first rail, alignment tabs, and a clamp member. The first rail on the mounting plate projects toward the first air channeling apparatus. The alignment tabs project toward the first air channeling apparatus and are configured to align with the air outlet. The clamp member has a first end and a second end. The first end is pivotally connected to the mounting plate and the clamp member includes a second rail. The flange of the first air channeling apparatus is secured between the first rail and the second rail as the clamp member is secured to the mounting plate.

Abstract: A vaporizing device with two concentric tubes for volatizing and inhaling one or more constituents of various vaporizable substances, such as medicines and plant materials. Devices may be successfully operated using the flame from a standard butane cigarette lighter or the like as the sole heat source. Concentric tubes, an inner tube with two open ends and an outer tube with one closed end provide a serpentine pathway for an airflow. An additional embodiment of the device provides a substitute for a standard slider-bowl allowing for the conversion of a standard water pipe into a vaporizing device. Other embodiments allow for vaporization of cigarettes.

Abstract: Apparatus and a method are disclosed for venting gas from an annulus region of a flexible pipe. The method includes the steps of depressurising a bore region of a flexible pipe and via at least one vent flow fluid communication path, venting gas from an annulus region of the flexible pipe into the bore region.

Abstract: A branch connection stub for connection to a main pipe. The branch connection stub presents an outside surface of revolution and has at least one axial internal passage, a rear segment with a fastener flange, an intermediate segment, and a front segment having a free end presenting a circular outline suitable for being mounting by plane welding around a circular opening in the wall of the main pipe. The intermediate segment includes a first wall and a second wall forming between them an acute angle towards the internal passage. The branch connection stub is applicable to a hot heat exchanger for rocket engines.