Abstract: A system is provided for diagnosing operation of an exhaust gas aftertreatment component for an internal combustion engine. The system includes a NOx sensor producing a NOx signal indicative of NOx content of exhaust gas exiting the aftertreatment component, and a control circuit configured to estimate as a function of a number of engine operating conditions a NOx inlet content corresponding to a NOx content of exhaust gas produced by the engine and entering the aftertreatment component. The control circuit is configured to determine a NOx conversion efficiency of the aftertreatment component as a function of the NOx signal and of the NOx inlet content, and to determine that the aftertreatment component is degraded if the NOx conversion efficiency is below a threshold value for at least a first predefined time period.

Abstract: An apparatus comprises a combustion engine, an emission abatement device, and a turbocharger. The emission abatement device is fluidly coupled to the engine to receive exhaust gas therefrom. The turbocharger comprises an air compressor that is fluidly coupled to the engine to supply pressurized air to the engine and that is fluidly coupled to the emission abatement device via a flow path not including any combustion section of the engine to supply pressurized air to the emission abatement device. An associated method is disclosed.

Abstract: An emission control system for an engine is disclosed in which an exhaust gas cooler is positioned upstream from a hydrocarbon trap in order to prevent premature desorbtion of hydrocarbons from the hydrocarbon trap. A bypass passage is also provided to allow the exhaust gas cooler to be bypassed to speed up the activation of a lean NOx trap positioned downstream from the hydrocarbon trap prior to hydrocarbon release.

Abstract: A first integration value is obtained by performing time integration on a feedback control signal during the time interval between the instant at which the deviation between a reference signal and the output signal of an oxygen sensor reverses from a negative value to a positive value and the instant at which the deviation reverses back to the negative value. A second integration value is obtained by performing time integration on a feedback control signal during the time interval between the instant at which the deviation between a reference signal and the output signal of the oxygen sensor reverses from a positive value to a negative value and the instant at which the deviation reverses back to the positive value. When the deviation between the absolute values of the first and second integration values is smaller than a predetermined threshold value, it is concluded that a feedback learning value is completely learned.

Abstract: A fuel fractionation method which can suitably control a state of a fuel at a time of fractionating the fuel in an internal combustion engine, which comprises the steps of applying an operation for promoting a fractionation of a fuel of an engine to a fractionation passage while making the fuel flow to the fractionation passage, thereby fractionating the fuel into a gas phase fuel and a liquid phase fuel within the fractionation passage, conducting the fractionated gas phase fuel and the fractionated liquid phase fuel to a branch point of the fractionation passage, and separating the gas phase fuel and the liquid phase fuel to a gas phase passage and a liquid phase passage, respectively due to gravity.

Abstract: A system is provided for regenerating an exhaust gas aftertreatment component of an internal combustion engine. The system is operable to determine an output torque of the engine, and to supply a single quantity of fuel to the engine after combustion of a main quantity of fuel if the output torque is greater than a torque threshold, and to otherwise supply a first quantity of fuel to the engine near an end of combustion of the main quantity of fuel followed by supplying a second quantity of fuel after combustion of the main quantity of fuel.

Abstract: A combustion burner refractory material retention system is provided. The system may include a tubular enclosure having a first section and a second section, wherein the first section has an internal cross-sectional area that is less than an internal cross-sectional area of the second section. A refractory material body may be disposed within the tubular enclosure second section. A first support layer may be disposed on a surface of the refractory material body, and at least one outer support layer may be disposed between the refractory material body and a wall of the tubular enclosure second section. The first support layer may form an insulating barrier between the refractory material body and the outer support layer, and a cross-sectional area of the combined refractory material body and first support layer may be at least as large as the internal cross-sectional area of the tubular enclosure first section.

Abstract: An exhaust system for a motorcycle having an engine mounted on a front half of a body frame of the motorcycle includes a plurality of first exhaust pipes extending from exhaust ports of the engine, a collecting section at which the first exhaust pipes are collected, a second exhaust pipe including a substantially straight portion connected to a downstream side of the collecting section and disposed under a crankcase of the engine, an expansion chamber connected to a downstream side of the second exhaust pipe and located under a rear wheel suspension arranged behind the engine, an exhaust outlet disposed on a most downstream portion of the expansion chamber, and an exhaust throttle valve and an exhaust gas sensor disposed on the straight portion of the second exhaust pipe.

Abstract: Exploiting natural pressure differences for producing mechanical power, either from the space by generating “vacuum” into a container, or from the sea bottom by generating compressed air, air liquide, or physical-chemical reactions into a container.

Abstract: A system for generating electricity includes a buoyancy pump operable to convert wave motion from a body of water into mechanical energy. The buoyancy pump includes a buoyancy block that reciprocally moves in response to wave motion to pump an operating fluid that is delivered to a turbine to produce electricity. The buoyancy block is preferably sized such that a diameter of the buoyancy block is no less than about one-sixth a wavelength and no greater than about one wavelength of an average wave for a region in which the buoyancy pump is operated.

Abstract: The present invention includes one illustrative embodiment that relates to a system that includes a piston pump, an open center valve, and an electronic controller. The piston pump is configured to provide a pressurized flow, such as to the open center valve. The open center valve is fluidly coupled to the piston pump, and configured thereby to receive the pressurized flow from the piston pump. The electronic controller is electrically connected to the piston pump. The electronic controller is also configured to receive operator input and to electronically control the piston pump, responsively to the input, to provide the pressurized flow to the first open center valve at a flow rate that is selectable from a range that is continuously variable from zero flow to a preselected maximum. Additional embodiments include, for example, a means for electronically controlling the piston pump, or a power machine with a frame, ground engaging members, and an engine.

Abstract: There is provided a hydraulic pump unit of variable displacement type disposed away from a pair of hydraulic motor units which are capable of being independently arranged, the pump unit fluid-connected to the pair of hydraulic motor units so as to change the outputs of the pair of hydraulic motor units in both forward and reverse rotation directions. The pump unit includes a hydraulic pump body operatively rotated and driven by a driving source, a pump case surrounding the hydraulic pump body, a capacity adjusting mechanism for changing the capacity of the hydraulic pump body, and a hydraulic servomechanism for transmitting an external input based on a manual operation to the capacity adjusting mechanism by utilizing a hydraulic force.

Abstract: A filter-integrated orifice element is provided which can reduce manufacturing costs and assembling costs in a hydraulic circuit for which size reduction is desirable. A filter-integrated orifice element is obtained by integrating a filter for removing an obstacle which could block an orifice with an orifice member. The filter-integrated orifice element may be used in a slow return valve in a hydraulic circuit.

Abstract: A hydraulic system for a work vehicle whose simple configuration allows many types of attachments to be properly operated is provided. The hydraulic system for a work vehicle includes a main hydraulic pump, a main supply circuit through which pressurized oil from the main hydraulic pump flows, a sub hydraulic pump, and a sub supply circuit through which pressurized oil from the sub hydraulic pump flows. The main supply circuit supplies pressurized oil to a hydraulic travel motor that drives a travel device and a service actuator that is disposed in an attachment with which the work vehicle is detachably furnished. The sub supply circuit merges with the main supply circuit and supplies pressurized oil to the service actuator. The hydraulic system for a work vehicle further includes a flow amount adjustment valve that adjusts the flow amount of the pressurized oil from the sub supply circuit that merges with the main supply circuit.

Abstract: A pneumatically static balancer for a machine tool counterbalances or lightens a gravitational load generated by an own weight of a vertically moving driven member. The pneumatically static balancer includes a pneumatic cylinder supporting the driven member and allowed to move vertically, a pneumatically static bearing having a piston inserted into the pneumatic cylinder, the pneumatic static bearing being formed by feeding compressed air, which is in an interior of the pneumatic cylinder, into a small clearance formed between the pneumatic cylinder and the piston, a cylinder rod connected to an upper end of the piston and a saddle supporting a leading end portion of the cylinder rod.

Abstract: A rotary Wankel-Stirling machine operating upon a compressible working fluid, having a rotary expander having a hot side housing with a heat input interface, a hot side rotor having rotor passages adapted to allow passage of the working fluid between the rotor hub and rotor face, heated chambers formed between the rotor face and the hot side housing, a rotary compressor having a cold side housing with a heat rejection interface, a cold side rotor having rotor passages adapted to allow passage of the working fluid between the rotor hub and rotor face, cooled chambers formed between the rotor face and the cold side housing, a shaft, adapted to rotatably couple the rotor hub of the hot side rotor and the rotor hub of the cold side rotor, the shaft having shaft passages adapted to allow passage of the working fluid between the heated chambers and the cooled chambers, and the working fluid sealed in the machine, wherein the machine operates under the Carnot cycle.

Abstract: A Rankine cycle system includes an evaporator for heating water with thermal energy of exhaust gas of an engine so as to generate steam; a displacement type expander for converting the thermal energy of the steam generated by the evaporator into mechanical energy; a temperature controller for manipulating the amount of water supplied to the evaporator so that the temperature of the steam supplied from the evaporator to the expander coincides with a target temperature; and a pressure controller for manipulating the rotational speed of the expander by changing a load of the expander so that the pressure of the steam supplied from the evaporator to the expander coincides with a target pressure. The temperature controller and the pressure controller control the amount of water supplied to the evaporator and/or the rotational speed of the expander according to at least an internal density of the evaporator.

Abstract: A turbojet engine includes a core engine, an afterburner, and a converging-diverging exhaust nozzle in serial flow communication. An integral starter-generator is disposed inside the core engine and is joined to the rotor for equal speed rotation therewith. An electrical controller coordinates operation of the engine for subsonic, transonic, and supersonic operation of the engine in a missile self-powered by the starter-generator.

Abstract: A corrected parameter control method for a two-shaft gas turbine, of the type in which the protection of the said turbine is provided by a first control loop which controls the opening of fuel valves to keep the gas temperature Tfire at the inlet to a first wheel of the said turbine and the fuel/air ratio F/A within specified limits: this control is provided in such a way that the exhaust temperature TX has values calculated by a linear approximation, in other words as the sum of a reference temperature TXbase to which are added corrections relating to a single environmental or operating parameter which differs from the reference parameter; a second control loop, which controls the opening of a valve (bleed valve) located between the outlet of the axial compressor and the atmosphere, controls the F/A ratio: this control is provided in such a way that the exhaust temperature has values calculated by a linear approximation.

Abstract: A barrier structure (302) blocks exit of spring clip fragments (317) that may break off from a spring clip assembly disposed between a gas turbine engine combustor (300) and a transition piece component (360). The barrier structure (302) may additionally comprise an aspect (326) effective to restrict a spring clip's (310, 311) radially inward compression, thereby reducing or eliminating damage to the spring clip (310, 311) during shipping and handling. The barrier structure (302) additionally may comprise an aspect (330) to restrict access by a human hand to the free ends (318) of the spring clips (310, 311). This aspect (330) reduces or eliminates the undesired lifting of the compressor by grabbing the spring clips (310, 311) during combustor transport, installation or removal. Accordingly, barrier structure embodiments are provided that reduce stress on spring clips, and that prevent the exit of spring clips from a containment space partly formed by the barrier structure.

Abstract: A combustion system for an engine, such as a gas turbine engine is provided. The combustion system has a ceramic component, such as ceramic combustor liner, and at least one metal support component, such as a metal ring or a plurality of metal cones, for providing radial and axial support to the ceramic component. The at least one metal support component includes a structure, such as axial slots or radial slots, for minimizing stress and for increasing compliance of the metal support component with respect to the ceramic component.

Abstract: An electronic apparatus and a heat-dissipation device thereof. The electronic apparatus includes a plate and the heat-dissipation device. The plate includes a first component and a second component thereon. The heat-dissipation device is adjacent to the plate, and includes a first sensor, a first cooling component, a second sensor, and a second cooling component thereon. The first sensor measures the temperature of the plate around the first component. The first cooling component is coupled to the first sensor to adjust the temperature of the plate around the first component. The second sensor measures the temperature of the plate around the second component. The second cooling component is coupled to the second sensor to adjust the temperature of the plate around the second component.

Abstract: A thermoelectric wafer chuck is disclosed. The thermoelectric wafer chuck includes a wafer support surface for supporting a wafer; and a thermoelectric module provided in thermal contact with the wafer support surface for heating and/or cooling the wafer support surface and wafer.

Abstract: A cooling apparatus comprises a pulse tube refrigerator (A) having a pressure source (1), a cold reservoir (6), a condenser (7), a pulse tube (9), a radiator (1), and a phase adjuster (12); and a low-temperature container having a liquid reservoir (21) fixed to a vacuum tank (31) through heat-insulating support members (36) and (37). The condenser (7) is fixed to a cold end (6b) of the cold reservoir (6), and is disposed in a gas phase portion (21a) of the liquid reservoir (21). A hot end of the pulse tube (9) is fixed to the vacuum tank (31) and is disposed in such a manner that a cold end (9b) of the pulse tube (9) is located lower than the hot end and is located in a liquid phase portion (21b) of the liquid reservoir (21). The cold end (9b) of the pulse tube (9) is disposed outside the liquid reservoir (21) but within the vacuum tank (31), and the cold end (9b) of the pulse tube (9) and the condenser (7) communicate with each other through piping (8).

Abstract: A system and a method for vaporizing a cryogenic liquid using a naturally circulating intermediate refrigerant.

Abstract: A low-emission gas vaporization system includes: a heat exchanger for cooling a medium used in a production process; a heat sink for eliminating heat; a vaporizer for changing liquid natural gas to gaseous natural gas; a cooling fluid supply path for providing cooled fluid to the heat exchanger from the heat sink; a cooling fluid return path for providing heated fluid to the heat sink from the heat exchanger; a heating fluid supply path for providing heated fluid to the vaporizer from the heat exchanger; and a heating fluid return path for providing cooled fluid to the heat exchanger from the vaporizer.

Abstract: An icemaker assembly includes an ice tray having an ice forming compartment, a water line configured to advance water from a water source to the ice tray, a valve operable to selectively block advancement of water through the water line while an actuation signal is generated, a control system operable to generate the actuation signal for a water advancement period, a water level detection system for determining if a level of water in the ice forming compartment is below a threshold value and generating a control signal in response thereto. The control system is further operable to alter a magnitude of the water advancement period in response to generation of the control signal. Water is initially advanced into the ice forming compartment for a first period of time during a first ice making cycle by opening the valve.

Abstract: Frost in a freezer and/or traffic between the freezer and an anteroom is controlled. The frost is controlled by estimating a condition of the anteroom that promotes the frost in the freezer and by opening a door in the doorway in response to the estimated condition in order to supply cold air from the freezer to the anteroom. The traffic between the freezer and the anteroom is controlled by detecting the traffic approaching the doorway and by opening the door in the doorway in response to the detected traffic.

Abstract: A refrigeration device with a thermally-insulating housing enclosing a cooling chamber and an evaporator separated form the cooling chamber. Two temperature sensors are placed in the vicinity of the evaporator to sense the layer of ice, which can form during operation. The temperature sensors are placed such that only one is embedded in the ice layer for a given thickness of the ice layer. A monitoring circuit is coupled to the temperature sensors to measure the temperature difference sensed by the temperature sensors. The monitoring circuit determines from the temperature difference if a defrosting of the evaporator is necessary. The monitoring circuit provides a signal for the determination, which can be used in an automatic defrosting process.

Abstract: The invention relates to an evaporator control by means of an expansion valve and an internal heat exchanger IHE. The evaporator control is controlled after the start of the evaporation process and the temperature of the compressor suction vapor, oil and hot gas as well as coolant liquid is controlled and regulated upstream of the injection valve.

Abstract: Method for chilling foodstuffs contained in a chilling compartment at controllable temperature, and adapted to perform according to an operating procedure comprising the steps of continuously pulling down the temperature inside the foodstuff to be chilled, until a pre-set value (Tf) is eventually reached, provided that the temperature inside said chilling compartment is lower than a pre-set value, and the temperature at the core of said foodstuff is lower than a pre-set value. In addition, before the process is allowed to move on to the final temperature pull-down step, further conditions are defined to ensure that the temperature pull-down pattern and rate inside the foodstuff are complying with the requirements provided for by the applying standards.

Abstract: An air conditioner includes: a compressor configured to compress a refrigerant; an outside heat exchanger configured to make the compressed refrigerant radiate heat; a pressure reducing unit configured to reduce the pressure of the heat-radiated refrigerant; an inside heat exchanger configured to vaporize the pressure-reduced refrigerant; a discharge pressure detector configured to detect a discharge pressure of the refrigerant discharged from the compressor; a controller configured to provide a duty factor according to the detected discharge pressure; and a control valve configured to adjust a discharge capacity of the compressor according to the provided duty factor. During a start-up operation of the compressor, the controller controls the duty factor provided to the control valve so that the discharge pressure detected by the discharge pressure detector is maintained within a predetermined range and so that the duty factor reaches a maximum system duty factor.

Abstract: A cogeneration system according to the present invention includes a waste heat supply heat exchanger that supplies waste heat, which is recovered from an engine, to a suction unit side of a compressor. Accordingly, the present invention is advantageous in that it can maximize the use efficiency of the waste heat. Furthermore, a low compression inverter type compressor having a compression ratio of 1.5 to 2.5, which is lower than that of the related art, is used. Therefore, the present invention is advantageous in that it can maximize the efficiency of the system since the waste heat supplied from the waste heat supply heat exchanger can be utilized to a greater extent. The present invention is also advantageous in that it can prevent damage to the compressor and can save consumption power since a difference in pressure between the suction and discharge units of the compressor becomes small.

Abstract: A method for cooling vehicle components using the vehicle air conditioning system comprising the steps of: tapping the hot liquid refrigerant of said air conditioning system, flooding a heat exchanger in the vehicle component with said hot liquid refrigerant, evaporating said hot liquid refrigerant into hot vapor refrigerant using the heat from said vehicle component, and returning said hot vapor refrigerant to the hot vapor refrigerant line in said vehicle air conditioning system.

Abstract: A vehicle with an air conditioner comprises an instrument panel center member disposed vertically behind an evaporator and fixed to a vehicle structure. The evaporator is disposed obliquely in such a manner that its maximum-area face has a crossing angle relative to a horizontal face and a distance between its front and rear ends is a specified length or greater. The evaporator is configured so as to be rotated between a vehicle dash panel being moved rearward and the instrument panel center member at a frontal crash of a vehicle in such a manner that the distance between its front end and rear end becomes shorter. Accordingly, the evaporator can be prevented from being pushed into a vehicle cabin at the vehicle frontal crash, thereby ensuring the safety of the passenger.

Abstract: A refrigerated display case for maintaining food product at a desired temperature. The refrigerated display case includes a case, a product display area, and a refrigeration system. The case includes a plurality of interconnected structural components including a first structural component with first and second sides, a second structural component coupled to the first structural component on the first side with a tab and slot connection, and a third structural component coupled to the first structural component on the second side with a tab and slot connection. The product display area is defined at least in part by the plurality of interconnected structural components and is adapted to support and display the food product. The refrigeration system supplies refrigerated air to the product display area and is adapted to maintain the food product at the desired temperature.

Abstract: A refrigerated display case including a case that defines a product display area adapted to support and display food product to be visible from the front of the case. The case includes a canopy positioned above the product display area with at least one display panel. A refrigeration system supplies refrigerated air to the product display area and is adapted to maintain the food product at a desired temperature. A light source supported by the case projects light along a first path of illumination directed toward the product display area adapted to brighten the food product and projects light along a second path of illumination directed toward the display panel. At least a portion of the light along the second path of illumination passes through the display panel to be visible from the front of the display panel.

Abstract: A defrost system for a temperature controlled storage unit includes an enclosure providing a space for storage of products. A refrigeration system has a supply line and a return line coupled to a cooling element to circulate a refrigerant through the cooling element to provide cooling to the space. A control module initiates a plurality of defrost modes on a predetermined frequency and for a predetermined duration by reducing a flow rate of the refrigerant through the cooling element so that a superheat temperature of the refrigerant in the cooling coil is increased to a predetermined range.

Abstract: Geothermal ground coils are installed and embedded in fill at the bottom of excavations, made for drainage fields associated with septic and other effluent systems, prior to the addition of the drainage field sanitary fill. This configuration eliminates the need for expensive bore holes and provides a ground heat source that is at a higher temperature than natural ground formations due to the supplemental heat imparted to the ground by the drain field effluent Fouling of the outside heat transfer surfaces of the ground coils is also avoided because of the clarifying and filtering action of the drain field fill. This provides an improved ground source heat pump system wherein the installation costs are reduced arid the capacity and efficiency of the system are improved.

Abstract: A two layer type air conditioner for vehicles facilitates drainage of water induced into a blower through an outside air intake to a condensed water outlet and prevents backflow of water to the blower. A blower has an intake duct for inhaling inside air and outside air. A double suction type scroll case mounted on the intake duct is divided into two passages by a partition plate. A blower fan is rotatably mounted in the two passages. A motor turns the blower fan. A case for the air conditioner includes an evaporator for cooling the air blown from the blower and a condensed water outlet for draining condensed water generated from the evaporator. The case is divided into two passages corresponding to those of the scroll case. A drain drains water induced into the blower to the condensed water outlet.

Abstract: The present invention relates to a refrigeration or air-conditioning apparatus which utilizes a vapor compression refrigeration system having a refrigerant circulating therethrough that comprises a compressor powered by an engine exhaust gas driven turbine. A mini centrifugal compressor may advantageously be used with such an apparatus, thus allowing the use of low GWP refrigerants. The present invention further relates to methods for powering a compressor, such as a mini-centrifugal compressor, in a refrigeration or air-conditioning apparatus, and methods for controlling compressor surge, impeller speed and cooling capacity.

Abstract: Disclosed is an automatic icemaker comprising a main body, an ice-making tray rotatably fitted to the main body, and a device for rotating the ice-making tray, wherein the ice-making tray is provided with a plurality of small chambers, the plurality of the small chambers are arranged in the direction of a rotation center line of the ice-making tray, and a water channel in a groove shape is provided at respective off-center portions of partition walls, each being provided between the small chambers adjacent to each other, or an upper surface of a partition wall provided between the respective small chambers adjacent to each other is positioned below an upper surface of the ice-making tray.

Abstract: The present invention relates to a four-way valve and an ice maker using such a four-way valve. A main valve of the four-way valve comprises a valve body and a slide seat formed integrally with the valve body. A valve core of the four-way valve may move between a first position and a second position. The valve core includes a sliding block slidable on the slide seat, wherein a recess is form on the sliding contact surface of the sliding block facing to the slide seat. A first port is formed on the valve body, and a second port, a third port, and a fourth port in the sliding direction of the sliding block are formed on the valve body.

Abstract: Refrigerator which permits the user to taking out food conveniently by moving up a container therein, and in which panels are provided on opposite sides of the container to pivot when the container moves in the vertical direction, for preventing injury to the user at the time the container moves up/down.

Abstract: A coaster 10 is disclosed as including a volume of water contained in a space between an upper part 12 and a plate 14 which are fixedly secured with each other. A method of providing such a coaster 10 is also disclosed as including steps of (a) providing an upper part 12; (b) providing a plate 14; (c) fixedly securing the upper part 12 and the plate 14 with each other by sonic welding to form a space therebetween; and (d) introducing a volume of water into the space. After filling of water into the space, the sonic-welded upper part 12 and plate 14 are then placed into a mould for injection moulding with a synthetic polymer, to further fixedly secure a heat insulating, non-slipping and impact resistant material.

Abstract: A temperature-maintaining device includes a temperature-maintaining member delimiting a space in which a container is removably received. The temperature-maintaining member includes an inner layer, an outer layer, and a temperature-maintaining layer between the inner layer and the outer layer. The inner layer and the outer layer are made of nylon, polyester, or polyurethane. The temperature-maintaining layer is made of neoprene. At least one chilling member is mounted to an inner face of the inner layer of the temperature-maintaining member. The chilling member cools the container to the desired temperature range, and the temperature-maintaining member provides an excellent temperature-maintaining effect.

Abstract: A refrigeration system including a coalescent oil separator for removing oil from a refrigerant gas and oil mixture discharged from a compressor. Upon a pressure condition being exceeded a directional flow valve opens to allow the refrigerant gas and oil mixture to bypass the coalescent oil separator. There is included a method for servicing the coalescent oil separator without having to resort to shutting down the refrigeration system or removing the refrigerant material.

Abstract: A thermodynamic method employs a refrigerant liquid that is immiscible to a motive liquid. The refrigerant vapor is compressed and condensed by the action of the motive liquid that comes in contact with the refrigerant vapor directly. Since the two liquids are immiscible to each other and have different specific gravity, they can be separated for recirculation.

Abstract: A condenser for an air conditioning system includes a receiver integrally formed with a second, or return, header which is in fluid communication with a second, or sub-cooling, group of tubes. A conduit extends between entry and discharge ends both of which are completely enclosed within the interior of the receiver. The conduit transports a refrigerant fluid in an upflow direction within the interior of the receiver and through a second fluid port located adjacent the discharge end of the conduit for directing the fluid into and through the return header to the sub-cooling group of tubes.

Abstract: In the formation of sheet glass by the overflow downdraw process, the width of usable sheet glass is maximized by downwardly flowing edge portions of the sheet over web-like members and thereafter over extensions which intersect with and are downwardly inclined relative to the web-like members to thin edge portions of the glass flow and maintain sheet width. The extension members are preferably removably attached to the web-like members, greatly facilitating replacement of the more easily damaged extension members.