Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7340894 | Unitized spring device and master cylinder including such device The invention is directed to improvements to the assembly of a unitized spring device. The spring device comprises a pair of retainer members which are tubular in shape and hollow inside. The retainer members have different outer circumference diameters which allow ... | 03/11/2008 |
| 7325399 | Coolant penetrating cold-end pressure vessel An improvement is provided to a pressurized close-cycle machine that has a cold-end pressure vessel and is of the type having a piston undergoing reciprocating linear motion within a cylinder containing a working fluid heated by conduction through a heater head by h... | 02/05/2008 |
| 7314315 | Gearbox for cold metal cutting machine Improved serviceability of cold metal cutting machines is accomplished in a modified gearbox structure enabling several annular components that are conventionally attached by press-fit to be attached instead by slide-fit for easy removal and replacement, eliminating... | 01/01/2008 |
| 7284373 | Thermodynamic cycle engine with bi-directional regenerators and elliptical gear train and method thereof A thermodynamic cycle heat engine comprising a regenerator housing with two bi-directional regenerators, compression and expansion chambers connected to different ends of the housing, and a gear train. Each of the bi-directional regenerators comprises a low pressure... | 10/23/2007 |
| 7225859 | Heat exchanger element and heat exchanger member for a stirling cycle refrigerator and method of manufacturing such a heat exchanger member A heat exchanger element for a Stirling cycle refrigerator is produced by integrally forming an annular corrugate fin that is produced by forming a sheet material, corrugated so as to have a large number of grooves, into a cylindrical shape with the grooves parallel... | 06/05/2007 |
| 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 |
| 7213399 | Refrigerator comprising a regenerator A refrigerator (1) has a housing (2, 14, 19), a cylindrical working chamber (15, 21), a cylindrical displacing member (11, 17), a gap (36, 38) which is located between the housing and the displacing member, a regenerator which is d... | 05/08/2007 |
| 7137251 | Channelized stratified regenerator with integrated heat exchangers system and method A channelized stratified regenerator with integrated heat exchangers are disclosed using micromachining to precisely construct structural geometries, such as fins and axial stratification of material to be used in a Stirling cycle based system. In operation, a worki... | 11/21/2006 |
| 7131276 | Pulse tube refrigerator The present invention relates to pulse tube refrigerators for recondensing cryogenic liquids. In particular, the present invention relates to the same for magnetic resonance imaging systems. In many cryogenic applications components, e.g. superconducting coils for m... | 11/07/2006 |
| 7129248 | Process for preparing oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone In certain embodiments the invention is directed to a process for preparing an oxycodone hydrochloride composition having less than 25 ppm of 14-hydroxycodeinone. ... | 10/31/2006 |
| 7114334 | Impingement heat exchanger for stirling cycle machines Impingement style heat exchanger through which significant heat transfer improvements can be obtained. The heat exchanger of the present invention operates such that the bulk of heat transfer between the heat source and the working fluid occurs during the portion of... | 10/03/2006 |
| 7111460 | Metering fuel pump A device and method for controlling the flow of a gaseous fuel from a fuel supply to a pressurized combustion chamber. A fuel pump is included in the gas train from supply to chamber. The fuel pump increases the pressure of the gas to allow efficient injection into ... | 09/26/2006 |
| 7089735 | Channelized stratified regenerator system and method A channelized stratified regenerator with integrated heat exchangers are disclosed using micromachining to precisely construct structural geometries, such as fins and axial stratification of material to be used in a Stirling cycle based system. In operation, a worki... | 08/15/2006 |
| 7076941 | Externally heated engine An externally heated engine is provided which has at least two pistons. The first piston has a first side (working side) and a second side opposite the first side. The first side of the first piston and the first cylinder define a first working chamber containing wo... | 07/18/2006 |
| 7047755 | Refrigerated merchandiser with foul-resistant condenser A refrigerated cold beverage merchandiser (10) includes an enclosure defining an insulated, refrigerated display cabinet (25) and a compartment (30) heat insulated therefrom wherein a compressor (40) a condenser (50) and a condense... | 05/23/2006 |
| 7013640 | Stirling engine assembly A seal between the head of a Stirling engine (1) and surrounding burner assembly (2). The seal comprises an annular trough (11) attached to one component and filled with a viscous liquid (14), and an annular blade attached to the other co... | 03/21/2006 |
| 7007469 | Dual shell Stirling engine with gas backup A Stirling engine which utilizes an inner and outer dual shell pressure containment system surrounding the high pressure and temperature engine components. The space between the shells is filled with a pressure backup gas and an insulation material with the backup g... | 03/07/2006 |
| 7000390 | Stirling cycle engine or heat pump with improved heat exchanger A Stirling cycle machine heat exchanger and a method for making the heat exchanger including, forming an annular ring of a solid heat conductive mass, the annular ring having a central axis and having axially opposite faces. A plurality of passages are drilled throu... | 02/21/2006 |
| 6991023 | Involute foil regenerator A regenerator having a plurality of involute foils disposed in an annular gap between an inner cylindrical tube and an outer cylindrical tube. The involute shape of the foils provides uniform spacing throughout the entire regenerator and substantial surface area for... | 01/31/2006 |
| 6990810 | Threaded sealing flange for use in an external combustion engine and method of sealing a pressure vessel A pressure vessel for containing a mechanical device operable to convert heat to mechanical or electrical power, comprising: a high temperature section, the high temperature section having a first end and an open second end, a sealing flange, the sealing flange havi... | 01/31/2006 |
| 6971235 | Evaporative burner An evaporative burner that includes an igniter assembly, a swirler, an evaporation chamber, and a reverse throat. The reverse throat has raised ends that protrude into the evaporation chamber. The reverse throat in combination with the evaporation chamber and the sw... | 12/06/2005 |
| 6968688 | Two-cycle hot-gas engine A two-cycle hot-gas engine comprising an expansion piston in a heatable cylinder member and a compression piston in a coolable cylinder member. The expansion piston and the compression piston are disposed along a common axis. ... | 11/29/2005 |
| 6952921 | Heater head assembly system and method A heater head assembly is provided with potential advantages of low assembly and integration requirements. A significant portion of the heater head assembly is formed or machined as a single piece of material to reduce assembly demands. The heater head assembly has ... | 10/11/2005 |
| 6945043 | Stirling engine, and stirling refrigerator A Stirling engine comprises a first porous body having a large hole diameter, a second porous body having a small hole diameter and a ring for fixing the first porous body and the second porous body in a pressurization chamber inside a gas outlet closer to the press... | 09/20/2005 |
| 6862883 | 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. A method ... | 03/08/2005 |
| 6857267 | Stirling cycle engine The Stirling cycle engine includes: a casing having a cylindrical shape; a cylinder for sidably inserting a displacer and a piston into a part adjacent to one end and another part adjacent to an other end thereof respectively,_the cylinder being coaxially placed ins... | 02/22/2005 |
| 6796123 | Uncoupled, thermal-compressor, gas-turbine engine The invention is for a continuous-combustion, closed-cycle, gas turbine engine with a regenerator and a displacer. It has embodiments that remove heater and cooler interior volumes during gas compression, which enable it to scale well to very large sizes. Low combus... | 09/28/2004 |
| 6779342 | Stirling engine In a Stirling cycle engine, a regenerator has a bobbin, a resin film wound around the outer surface of the bobbin, and a sheath fitted around the outer surface of the resin film and having a slit formed vertically therein. The resin film has one end fixed on the out... | 08/24/2004 |
| 6732515 | Traveling-wave thermoacoustic engines with internal combustion Thermoacoustic devices are disclosed wherein, for some embodiments, a combustion zone provides heat to a regenerator using a mean flow of compressible fluid. In other embodiments, burning of a combustible mixture within the combustion zone is pulsed in phase with th... | 05/11/2004 |
| 6701708 | Moveable regenerator for stirling engines A Stirling cycle engine comprises a substantially sealed engine block that defines a working fluid space, a hot path and a cold path. A heat source and a heat sink are configured to keep the hot path and the cold path at different temperatures. The engine... | 03/09/2004 |
| 6698200 | Efficiency thermodynamic engine A novel thermodynamic engines including a piston operating on a compressible fluid in a thermally insulated volume, which also includes a movable displacer which selectively divides the internal volume between a warm and a cold side, and a regenerator thr... | 03/02/2004 |
| 6694731 | Stirling engine thermal system improvements A thermal cycle engine having a heat exchanger for transferring thermal energy across the heater head from a heated external fluid to the working fluid. The heat exchanger has a set of heat transfer pins each having an axis directed away from the cylindri... | 02/24/2004 |
| 6684637 | Parallel slot heat exchanger A heat exchanger in which a fluid and a surface transfer thermal energy effectively with a smaller pressure drop than is conventionally realized. In a preferred embodiment, gas at one end of a piston flows into a piston chamber and passes radially through... | 02/03/2004 |
| 6606849 | External combustion engine An external combustion engine (1) comprising pressure vessel means defining a tubular working chamber (3) having spaced apart first and second ends and including first wall means (11), adjacent the first end of the chamber, heated by heating means (10, 11... | 08/19/2003 |
| 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 |
| 6578359 | Stirling engine To generate electric power efficiently with a thermoelectromagnetic generator using the heat regenerator of a Stirling engine. When a high-temperature operating gas and a low-temperature operating gas alternately pass through a heat regenerator of a Stirl... | 06/17/2003 |
| 6526750 | Regenerator for a heat engine A multi-channel thermal regenerator for a heat engine comprising a coiled annulus of thin high-temperature sheet material coiled so that individual coils are in spaced substantially parallel arrangement in an annular configuration. In one embodiment the s... | 03/04/2003 |
| 6513326 | Stirling engine having platelet heat exchanging elements The present invention provides heat exchanging elements for use in Stirling engines. According to the present invention, the heat exchanging elements are made from muliple platelets that are stacked and joined together. The use of platelets to make heat e... | 02/04/2003 |
| 6470679 | Apparatus and method for transferring entropy with the aid of a thermodynamic cycle The invention relates to regenerative working and thermal processes, the drive energy of which is supplied by external combustion of the fuel. The heat supply for this, almost always assumed to be isothermic, is achieved only in exceptional cases, since t... | 10/29/2002 |
| 6385973 | Micro-scalable thermal control device A microscalable thermal control module consists of a Stirling cycle cooler that can be manipulated to operate at a selected temperature within the heating and cooling range of the module. The microscalable thermal control module is particularly suited for... | 05/14/2002 |
