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| Number | Title | Issue Date |
| 7219712 | Reduced shedding regenerator and method A reduced shedding regenerator and method are disclosed with regenerator surfaces to minimize shedding of particles from the regenerator thereby alleviating a source of potential damage and malfunction of a thermal regenerative machine using the regenerator. ... | 05/22/2007 |
| 7210324 | Process and apparatus for producing an ordered packing The invention relates to a process and an apparatus for producing a profiled sheet, in which the sheet is provided with a corrugation which runs obliquely with respect to the edges of the sheet and has a substantially constant angle of inclination. At least one edge... | 05/01/2007 |
| 7210209 | System and method for ballizing and measuring a workpiece bore hole A system and method are described for ballizing and measuring a workpiece bore hole. In one embodiment, a ballizing unit having a distal end removably coupled to a ballizing member moves the ballizing member from a first position within the bore hole to a second pos... | 05/01/2007 |
| 7159643 | Heat storing element and method for manufacturing heat storage apparatus using the element Appropriate amount of brazing material is put on each of inner and outer recessed portions of a first heat storing element. Then, the first heat storing element is placed close to and substantially parallel to a second heat storing element, and an inner projected po... | 01/09/2007 |
| 7147050 | Recuperator construction for a gas turbine engine A counter-flow recuperator formed from annular arrays of recuperator core segments. The recuperator core segments are formed from two opposing sheets of fin fold material coined to form a primary surface zone disposed between two flattened manifold zones. Each prima... | 12/12/2006 |
| 7082987 | Rotary regenerative heat exchanger and rotor therefor A rotary regenerative heat exchanger includes a rotor having primary vanes 14 extending between the hub and the periphery of the rotor, and additional secondary vanes 15 between said primary vanes and extending over an outer annulus of the rotor. Such ... | 08/01/2006 |
| 7066375 | Aluminum coating for the corrosion protection of welds A method for coating and an associated assembly including such a coating are provided. The assembly includes a workpiece defining a weld portion, such as a friction weld joint and a heat affected zone. A coating is disposed on the weld portion to at least partially ... | 06/27/2006 |
| 7065873 | Recuperator assembly and procedures A construction of recuperator core segments is provided which insures proper assembly of the components of the recuperator core segment, and of a plurality of recuperator core segments. Each recuperator core segment must be constructed so as to prevent nesting of fi... | 06/27/2006 |
| 7063128 | Drum type heat exchanger A drum type heat exchanger for effectively ventilating and purifying room air of a factory, a building or a house and the like is described. The drum type heat exchanger has heat transfer means with a drum shape and thus an entire size is reduced as much as possible... | 06/20/2006 |
| 7024907 | Method and device for manufacturing a structured packing corrugation, and corresponding fluid-treatment apparatus A folding-pressing operation is carried out on the strip (17) in successive steps, by means of two opposed dies (11,12) with a relative movement alternating between coming together and moving apart, these dies having active surfaces (11,12) whic... | 04/11/2006 |
| 6928730 | Method for making a multi-pass exhaust gas recirculation cooler An apparatus and method for cooling hot fluids, especially exhaust gases, with a multi-pass cooler core. The cooler core is particularly useful for cooling exhaust gases flowing in an exhaust gas recirculation (EGR) system or regime in operative association with an ... | 08/16/2005 |
| 6860011 | Method for attaching an air duct to a recuperator core A method of attaching an air duct to a recuperator core may include welding a pair of butterpasses along a length of each of a plurality of core portions, connecting the plurality of core portions to one another to form the recuperator core and a pair of butterpasse... | 03/01/2005 |
| 6732785 | Tab joint in etched foil regenerator A joint connecting consecutive sheets of etched regenerator foil for a spiral-wrapped regenerator of a regenerative gas cycle machine such as a Stirling cycle engine or Stirling, pulse tube, or Gifford-McMahon cryocooler. The joint comprises a multiplicity of tabs o... | 05/11/2004 |
| 6701609 | Apparatus for tack welding a recuperator cell An apparatus for manufacturing a cell of a recuperator wherein the cell includes a plurality of primary surface sheets, a plurality of spacer bars and a pair of guide vanes. A fixture has a top portion and a bottom portion. The top portion is pivotably mo... | 03/09/2004 |
| 6691410 | Method of inspecting a geometry and dimensional accuracy of a circular recuperator inspection fixture An inspection fixture and line is used to accurately determine the geometry and dimensional accuracy of a circular recuperator core. With the fixture and line inspection of a length, an inner diameter and an outer diameter of the circular recuperator core... | 02/17/2004 |
| 6687979 | System for manufacturing a circular primary surface recuperator A system is disclosed to manufacture a recuperator core. The core is made up of a plurality of cells and an inner sealing member. A manufacturing system has an input end, an assembly station having a lower or inner chucking portion and an upper portion, a... | 02/10/2004 |
| 6684502 | Method and apparatus for aligning a circular recuperator core A method for aligning a circular core. The method has a work station which defines an inner chucking portion being movable between a lower position and an upper position and a retracted position and an expanded position. The work station defines an upper ... | 02/03/2004 |
| 6668446 | Recuperator duct assembly line An assembly line for economically and efficiently assembling a core into a recuperator. The assembly line has an inlet end, an assembly station, a welding station, a control station and an outlet end. The inlet end has a plurality of the cores to be used ... | 12/30/2003 |
| 6648061 | Heating element for a regenerative heat exchanger and method for producing a heating element A heating element is described for a regenerative heat exchanger that is constructed as a profiled steel sheet. The aim of the invention is to produce a heating element that is resistant to acids, has anti-soiling properties and, however, has a good therm... | 11/18/2003 |
| 6591609 | Regenerator for a Stirling Engine A regenerator for a thermal cycle engine and methods for its manufacture. The regenerator has a random network of fibers formed to fill a specified volume and a material for cross-linking the fibers at points of close contact between fibers of the network... | 07/15/2003 |
| 6357113 | Method of manufacture of a gas turbine engine recuperator A method of manufacturing a recuperator for a gas turbine engine comprises the steps of stamping a plurality of spaced integral ribs on a metal plate so as to define a plurality of high pressure channels, stamping a plurality of spaced integral ribs on a ... | 03/19/2002 |
| 6347453 | Assembly method for concentric foil regenerators A method of assembling a regenerator comprising multiple concentric layers of foil, each with an unbonded joint inside a generally cylindrical space, by inserting each successive layer of foil into the remaining space inside said generally cylindrical spa... | 02/19/2002 |
| 6345442 | Method of making rotor design with double seals for vertical air preheaters A method for adding additional axial seals and radial seals within existing air preheaters. The installed heat transfer baskets, radial seals, axial seals, and gratings are all removed from the air preheater. The existing stay plates are modified, if they... | 02/12/2002 |
| 6308409 | Recuperator cell assembly system Recuperators include a core which is commonly constructed of a plurality of relatively thin flat sheets having an angled or corrugated spacer fixedly attached therebetween. The sheets are joined into cells, sealed and form passages between the sheets. The... | 10/30/2001 |
| 6289584 | Method of manufacturing of a plate type heat exchanger The invention related to a method in the manufacture of a plate heat exchanger (1), preferably a so-called recuperator. This has flow channels arranged between the plates, every other channel being designed to accommodate the flow of a heat-emitting mediu... | 09/18/2001 |
| 6158121 | Method and apparatus for making a recuperator cell Circular recuperators are used to increase the efficiency of gas turbine engines. The present circular recuperators is made of a plurality of cells. Each of the plurality of cells includes a plurality of components, such as, a plurality of sheets, a plura... | 12/12/2000 |
| 6115919 | Heat exchanger An annular heat exchanger suitable for a gas turbine engine includes a first continuous sheet of material arranged in a spiral and a second continuous sheet of material arranged in a spiral. A first axially extending passage is defined between the first s... | 09/12/2000 |
| 6112403 | Method and apparatus for making a recuperator cell Circular recuperators are used to increase the efficiency of gas turbine engines. The present circular recuperators are made of a plurality of cells. Each of the plurality of cells includes a plurality of components, such as, a plurality of sheets, a plur... | 09/05/2000 |
| 5979050 | Air preheater heat transfer elements and method of manufacture Heat transfer elements for rotary regenerative heat exchangers are formed with spacing ridges or notches having flow-disrupting indentations in the peaks of the notches formed at selected intervals to project into the flow channels. These projections inte... | 11/09/1999 |
| 5918368 | Method for making a recuperator cell Circular recuperators are used to increase the efficiency of gas turbine engines. The present circular recuperators is made of a plurality of cells. Each of the plurality of cells includes a plurality of components, such as, a plurality of sheets, a plura... | 07/06/1999 |
| 5758908 | Oil cooler with improved coolant hose connection An oil cooler (16) including an oil cooler housing (22) and a coolant hose connection (24) for transferring a coolant flow between a coolant hose (28) and the oil cooler housing (22), wherein the hose connection (24) changes the direction of the coolant f... | 06/02/1998 |
| 5615732 | Air preheater with semi-modular rotor construction The rotor for a rotary regenerative air preheater is fabricated from a combination of shop assembled rotor sector modules and field assembled components so as to eliminate the double plate diaphragms of conventional modular rotors. The shop assembled modu... | 04/01/1997 |
| 5538073 | Balanced dual flow regenerator heat exchanger system and core driving system A gas turbine engine includes a gas generator having a compressor, a first turbine member, and a combustor member between the compressor and the first turbine member for increasing the temperature of the fluid medium to be worked upon by the engine. A sec... | 07/23/1996 |
| 5314006 | Sheet metal heating package for regenerative heat exchangers as well as a method and apparatus for manufacture of profiled metal sheets for such sheet metal heating packages A sheet metal heating package for heat exchangers including a plurality of superimposed sheets having at least a partial profiling for instance embossments leaving free flow channels in between themselves, which sheets carry a coating serving as a surface... | 05/24/1994 |
| 5298337 | Perforated plates for cryogenic regenerators and method of fabrication Perforated plates (10) having very small holes (14) with a uniform diameter throughout the plate thickness are prepared by a "wire drawing" process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is e... | 03/29/1994 |
| 5119885 | Element basket for horizontal rotary regenerative heat exchanger An improved element basket for a rotary air preheater includes a tubular structural element disposed in each of the four corners of the basket frame and extending therethrough in mutually parallel relation. During installation of the basket into the prehe... | 06/09/1992 |
| 5101894 | Perforated plate heat exchanger and method of fabrication Perforated plate heat exchangers and cryocoolers based on plates with extremely small, tubular holes are disclosed. The plates may have hole diameters down to the low micron size range and length-to-diameter ratios above unity and from 2 to 6 for typical ... | 04/07/1992 |
| 4934322 | System for protecting a heat-recovery boiler screen, and a method of manufacturing the system A system for protecting a heat-recovery boiler screen, in particular for waste incineration furnaces, said screen being formed by vertical tubes (1, 2) interconnected by welded fixing fins (3, 4, 5) disposed in cavities in refractory bricks (7) and provid... | 06/19/1990 |
| 4903757 | Heat exchanger rotor and a method of manufacturing such a rotor The invention provides a regenerative heat exchanger rotor with an outer casing which comprises a plurality of layers of a helically wound strip orientated so that its width direction is radial with respect to the rotor, a core on which the strip is wound... | 02/27/1990 |
| 4890670 | Cross-flow heat exchanger To permit high-temperature differential cross flow of an initially cool, heat absorbing medium and an initially hot, heat releasing medium, with temperature differences in the order of 1000° and higher, and to prevent localized thermal overload, the heat... | 01/02/1990 |
