Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8061134 | Annular burner assembly An annular burner assembly having an annular burner mesh. An annular gas/air supply duct supplies a combustible gas/air mixture to the burner mesh in a substantially axial direction. A flow modifier is provided in the vicinity of the burner and has a plurality of fi... | 11/22/2011 |
| 7805935 | Stirling engine and control method therefor In a Stirling engine, a casing houses therein component elements of the Stirling engine, including a high-temperature-side cylinder, a high-temperature-side piston, a connecting rod, a crankshaft, etc. A pressure control device determines whether the pressure of the... | 10/05/2010 |
| 7581393 | Stirling engine A stirling engine includes a flow path that communicates a working space of the stirling engine and outside of the stirling engine. A working gas is supplied from the outside of the stirling engine to the working space via the flow path based on a differential press... | 09/01/2009 |
| 7313916 | Method and apparatus for generating power by combustion of vaporized fuel An apparatus for producing power from a source of liquid fuel. The apparatus includes at least one capillary flow passage, the at least one capillary flow passage having an inlet end and an outlet end, the inlet end in fluid communication with the source of liquid f... | 01/01/2008 |
| 7310945 | Work-space pressure regulator A device and method for equalizing the pressure between work-space and crankcase in a pressurized engine, such as a Stirling engine. The device consists of a two-way valve connected between the work-space and the crankcase. The valve is connected to the work-space w... | 12/25/2007 |
| 7308787 | Thermal improvements for an external combustion engine An external combustion engine having an exhaust flow diverter for directing the flow of an exhaust gas. The external combustion engine has a heater head having a plurality of heater tubes through which a working fluid is heated by conduction. The exhaust flow divert... | 12/18/2007 |
| 7200994 | Free piston stirling engine control A control system for a Stirling engine including the use of a synchronous power converter (“SPC”) which is connected to the terminals of the alternator in a linear alternator/FPSE power system. According to the teachings of the present invention, the attached SP... | 04/10/2007 |
| 7194858 | Hydrogen equalization system for double-acting stirling engine A working gas pressure equalization system for a multiple-cylinder, double-acting hot gas engine such as a Stirling engine of the type having a plurality of pistons reciprocatable within the cylinders defining a plurality of generally isolated cycle volumes of a wor... | 03/27/2007 |
| 7178324 | External combustion engine An external combustion engine comprises a compressor assembly, a heater assembly, an expander assembly, a cooler assembly, and auxiliary systems. The preferred embodiment of this invention uses fossil fuel as the main source of energy, and water substance for the wo... | 02/20/2007 |
| 7168234 | Recuperative heater for an external combustion engine A recuperative heater for heating the heater heads of an external combustion machine includes a recuperative heat exchanger having an axial pass section partially surrounding the combustion chamber. Combustion products pass from the recuperative heat exchanger to a ... | 01/30/2007 |
| 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 |
| 7134270 | External combustion engine An external combustion engine comprising a body (8), at least one working chamber (18), combustion chamber (13), crankcase (21) and compression chamber (6), at least one working piston (20), compression piston (7) and... | 11/14/2006 |
| 7134279 | Double acting thermodynamically resonant free-piston multicylinder stirling system and method Present implementations provide an approach that allows for a double-acting, multi-cylinder, thermodynamically resonant, alpha configuration free-piston Stirling system. The system includes overstroke preventers that control extent of piston travel to prevent undesi... | 11/14/2006 |
| 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 |
| 7028473 | Hot-gas engine The hot-gas engine comprises a cylinder, a working piston which together with a cylinder cover delimits a cylinder space designed to accommodate a working medium, a displacement piston which divides the cylinder space into a first and a second working space, as well... | 04/18/2006 |
| 7007470 | Compression release valve An electromechanical compression release valve for compressors, engines with rotary or reciprocating mechanisms and external combustion engines, such as, a Stirling cycle engine, reduces the engine starting power by reducing the compression pressure in the cylinder ... | 03/07/2006 |
| 6996983 | Stirling engine A rotary Stirling-type engine (100) having a heat chamber (105) with a compressing turbine (107) at one end and a valve assembly (108) through which gas enters the heat chamber (105). At the order end is a nozzle housing (109 | 02/14/2006 |
| 6971236 | Domestic combined heat and power unit A DCHP unit with a Stirling engine (1), a burner (3) and a supplementary burner (11). Water is heated by exhaust gas from the Stirling engine and from the supplementary burner. If a sensor (18) detects that the water temperature has risen... | 12/06/2005 |
| 6968703 | Mechanical freezer The Mechanical Freezer of this invention closely approaches an ideal freezer cycle composed of constant temperature compression, expansion, and constant volume heating (load transfer) by using power piston 106 that power input shaft 50 moves up and dow... | 11/29/2005 |
| 6920967 | Controller for reducing excessive amplitude of oscillation of free piston An apparatus for detecting and reducing excessive amplitude of oscillation of a free piston slidably mounted in a housing. The housing has a vibration absorber, including a mass mounted through a spring to the housing. The mass reciprocates relative to the housing a... | 07/26/2005 |
| 6913051 | Tire with dual anchorage carcass ply Tire, comprising at least one carcass-type reinforcement structure extending circumferentially from the bead to the sidewall and a crown reinforcement, each of the beads further comprising a main anchoring zone for supporting the reinforcement structure, the tire co... | 07/05/2005 |
| 6857260 | Thermal improvements for an external combustion engine An external combustion engine having an exhaust flow diverter for directing the flow of an exhaust gas. The external combustion engine has a heater head having a plurality of heater tubes through which a working fluid is heated by conduction. The exhaust flow divert... | 02/22/2005 |
| 6755021 | On-board hydrogen gas production system for stirling engines A hydrogen production system for use in connection with Stirling engines. The production system generates hydrogen working gas and periodically supplies it to the Stirling engine as its working fluid in instances where loss of such working fluid occurs through usage... | 06/29/2004 |
| 6705081 | System and method for sensor control of the fuel-air ratio in a burner A method for controlling the fuel-air ratio of a burner having a blower responsive to a blower drive signal for injecting air into the burner. The method is based at least on the concentration of a gas in an exhaust gas product of a combustion chamber of the burner ... | 03/16/2004 |
| 6701721 | Stirling engine driven heat pump with fluid interconnection A heat pumping machine, such as used for home heating and cooling, has a free piston Stirling engine driving a vapor compression heat pump. The engine is mechanically linked to the compressor inside a common hermetically sealed enclosure. A fluid conducti... | 03/09/2004 |
| 6543215 | Thermal improvements for an external combustion engine An external combustion engine having an exhaust flow diverter for directing the flow of an exhaust gas. The external combustion engine has a heater head having a plurality of heater tubes through which a working fluid is heated by conduction. The exhaust ... | 04/08/2003 |
| 6338248 | Heating and refrigerating machine, especially a vuilleumier heat pump or a stirling engine A heating and refrigerating machine, especially a Vuilleumier heat pump or Stirling engine, in which a gas-air mixture is combusted in a combustion chamber and the exhaust gas radiates thermal energy to a heater head, which functions as a housing for the ... | 01/15/2002 |
| 6247310 | System and method for control of fuel and air delivery in a burner of a thermal-cycle engine A method of combusting fuel and air in a burner of an external combustion engine having a heater head. The fuel and air are combined to form a fuel-air mixture which is characterized by a fuel-air ratio. An exhaust gas product is produced when the fuel-ai... | 06/19/2001 |
| 6032464 | Traveling-wave device with mass flux suppression A traveling-wave device is provided with the conventional moving pistons eliminated. Acoustic energy circulates in a direction through a fluid within a torus. A side branch may be connected to the torus for transferring acoustic energy into or out of the ... | 03/07/2000 |
| 5755100 | Hermetically sealed stirling engine generator A hermetically sealed Stirling engine driven generator system with a rotating generator, self lubricated bearings using PTFE filled polyimide, a fibrous ceramic piston dome, and flame sprayed ceramic and PTFE coating on the pistons, which allow an oil fre... | 05/26/1998 |
| 5485726 | Pressure control apparatus for stirling module An improved pressure control apparatus for a stirling module capable of controlling a pressure between compression space and a bounce space by providing an improved pressure control apparatus, so that a high speed operation of a stirling module can be obt... | 01/23/1996 |
| 5203170 | Stirling engine generating system A Stirling engine generating system comprises a Stirling engine driven by solar heat which is used as a heat input source for the engine, a generator driven by the Stirling engine, a temperature sensor detecting the temperature of an operational gas enclo... | 04/20/1993 |
| 5095701 | Apparatus for controlling rotational speed of Stirling engine There is disclosed an apparatus for controlling the rotational speed of a Stirling engine in such a way that effective use is made of dump power produced when the speed of the engine is maintained constant. The apparatus comprises a tank in which a workin... | 03/17/1992 |
| 4958496 | Multi-bottle, no compressor, mean pressure control system for a Stirling engine The invention relates to an apparatus for mean pressure control of a Stirling engine without the need for a compressor. The invention includes a multi-tank system in which there is at least one high pressure level tank and one low pressure level tank wher... | 09/25/1990 |
| 4881372 | Stirling engine A Stirling engine includes a heater device for collecting solar radiation energy, a heater tube disposed in the heater device and connecting the expansion space and the compression space of cylinder containing a piston, and a transparent partition located... | 11/21/1989 |
| 4738106 | Starting apparatus for stirling engines A Stirling engine in which a working space is communicated with a working gas tank through a minimum cycle pressure line having an accelerating valve and a one-way valve and a maximum cycle pressure line having a decelerating valve and a one-way valve is ... | 04/19/1988 |
| 4732000 | Output control apparatus for stirling engines A Stirling engine control apparatus includes a pressure reducing valve provided in a maximum cycle pressure line connecting a working space to a working gas compressor via a first check valve, a pressure boost valve provided in a minimum cycle pressure li... | 03/22/1988 |
| 4706457 | Apparatus for controlling working gas pressure in stirling engines Described is a working gas pressure control apparatus for a Stirling engine including a pressure boost valve provided in a minimum cycle pressure line connected to a working space by a first unidirectional valve, a pressure reducing valve provided in a ma... | 11/17/1987 |
| 4677824 | Output control apparatus for Stirling engines A Stirling engine control apparatus includes a pressure reducing valve provided in a maximum cycle pressure line connecting a working space to a working gas compressor and a working gas tank via a first check valve, a pressure boost valve provided in a mi... | 07/07/1987 |
