Having Free Floating Displacer Or Transfer Piston Patents (Class 60/520)
  • Patent number: 10774783
    Abstract: A liquid piston Stirling engine electrical generator, the generator being a linearly reciprocating electrical generator that is powered by a Stirling engine having a liquid piston that is displaced by the cyclic contraction and expansion of a gas resulting from increases and decreases in temperature. The liquid piston and dynamic components of the linear generator are retained within a U-shaped tube or chamber, the tube being oriented in use to consist of a two upwardly extending, first and second vertical segments joining a horizontal segment. A liquid, such as oil or hydraulic fluid, is present in sufficient quantity to fill the horizontal segment and extend upward into the vertical segments.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: September 15, 2020
    Assignee: STRATUM VENTURES, LLC
    Inventor: Donald Goyette
  • Patent number: 10753652
    Abstract: A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: August 25, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Patent number: 10711733
    Abstract: Systems and methods for converting energy are provided. In one aspect, the system includes a closed cycle engine defining a cold side. The system also includes a bottoming-cycle loop. A pump is operable to move a working fluid along the bottoming-cycle loop. A cold side heat exchanger is positioned along the bottoming-cycle loop in a heat exchange relationship with the cold side of the closed cycle engine. A constant density heat exchanger is positioned along the bottoming-cycle loop downstream of the cold side heat exchanger and upstream of an expansion device. The constant density heat exchanger is operable to hold a volume of the working fluid flowing therethrough at constant density while increasing, via a heat source, the temperature and pressure of the working fluid. The expansion device receives the working fluid at elevated temperature and pressure and extracts thermal energy from the working fluid to produce work.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: July 14, 2020
    Assignee: General Electric Company
    Inventors: Michael Robert Notarnicola, Joshua Tyler Mook, Kevin Michael VandeVoorde, Aigbedion Akwara, Mohammed El Hacin Sennoun, Mary Kathryn Thompson
  • Patent number: 10598411
    Abstract: Magnetic refrigerating device improves refrigerating capacity and efficiency by improving the heat exchanging method between a magnetic material and a heat exchanging fluid and devising a magnetic field applying method. The magnetic refrigerating device comprises: a cylindrical active magnetic regenerator (AMR) bed accommodating refrigerant therein; two magnetic materials disposed in the AMR bed in the axial direction, configured to be movable in the axial direction of the AMR bed, and made of material having a magnetocaloric effect; at least two permanent magnets positioned to face the two magnetic materials; a rotary shaft positioned between the two magnetic materials in the AMR bed and positioned between the at least two permanent magnets; and a magnetic rotary movement unit that rotationally moves the permanent magnets about the rotary shaft and that repeatedly moves the permanent magnets and the two magnetic materials closer together and farther apart in association with the rotational movement.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: March 24, 2020
    Assignee: National Institute for Materials Science
    Inventor: Takenori Numazawa
  • Patent number: 10495354
    Abstract: A mechanical system, such as cryogenic refrigerator system, is described. The system comprises two or more axial moving elements generating two or more cyclic forces along parallel axes and a vibration attenuation unit. The cyclic forces are provided with common frequency and certain phase difference between them. The vibration attenuation unit is configured for attenuating vibrations corresponding to two or more modes of vibrations characterized by a frequency corresponding to operation frequency of said two or more cyclic forces.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: December 3, 2019
    Assignee: SEMI-CONDUCTOR DEVICES—AN ELBIT SYSTEMS-RAFAEL PARTNERSHIP
    Inventor: Alexander Veprik
  • Patent number: 10495352
    Abstract: An active gas regenerative refrigerator includes a plurality of compressor-expander units, each having a hermetic cylinder with a drive piston configured to be driven reciprocally therein, and a quantity of working fluid in each end of the cylinder. A piston seal in a central portion of the cylinder prevents passage of the working fluid between ends of the cylinder. Movement of the piston to a first extreme results in radial compression of one of the quantities of working fluid in a cylindrical gap formed between one end of the piston and an inner surface of the cylinder, while the other quantity is expanded in the opposite end of the cylinder. The piston includes a plurality of magnets arranged in pairs, with magnets of each pair positioned with like-poles facing each other. A piston drive is configured to couple with transverse magnetic flux regions formed by the magnets.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: December 3, 2019
    Assignee: EMERALD ENERGY NW, LLC
    Inventors: John A. Barclay, Lucian G. Ferguson
  • Patent number: 10488082
    Abstract: A cooling system includes a first dewar configured to house a first optical imaging device, a second dewar configured to house a second optical imaging device, and a Stirling cycle refrigerator. The Stirling cycle refrigerator can include a compressor, a first expander in fluid communication with the compressor and in thermal communication with the first dewar, and a second expander in fluid communication with the compressor and in thermal communication with the second dewar.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: November 26, 2019
    Assignee: Goodrich Corporation
    Inventors: Joseph W. Landry, John Anthony Tejada
  • Patent number: 10415689
    Abstract: A method of using a thermoelectric generator for warming a transmission on a vehicle having an internal combustion engine is provided. The method includes starting the internal combustion engine, thereby generating a hot exhaust gas; circulating coolant through a heating loop in fluid communication with the internal combustion engine and the thermoelectric generator; passing the hot exhaust gas through a hot-side of the thermoelectric generator and circulating the coolant through the cold-side of the thermoelectric generator, thereby transferring heat from the hot exhaust gas to the coolant and generating an electric current; and selectively powering an electric heating element with the electric current. The electric heating element is in thermal communication with a transmission fluid of the transmission.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: September 17, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Douglas Dickson, Lawrence P. Ziehr, James R. Salvador, Daniel J. Shepard
  • Patent number: 10393411
    Abstract: A Stirling cryocooler includes a displacer having a displacer base portion disposed on a center axis and a displacer tip portion aligned along the center axis, extending from the displacer base portion to a working-gas expansion space, and a regenerator disposed surrounding the displacer tip portion such as to guide reciprocating travel of the displacer along the center axis. The displacer tip portion includes a plurality of platelike components arranged along the center axis, with each of the plurality of platelike components being furnished with a component side surface defining a portion of the outer surface of the displacer tip portion. The plurality of platelike components form working gas layers between pairs of adjoining components, and/or are formed of a synthetic resin material.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: August 27, 2019
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Kyosuke Nakano, Yoshikatsu Hiratsuka, Kenta Yumoto
  • Patent number: 10323603
    Abstract: A free-piston Stirling engine that limits piston amplitude and reduces engine power as the piston amplitude increases beyond its maximum power. The inward edge of the heat rejecter cylinder port is located outward of the most inward excursion of the inward end of the piston sidewall during a part of the piston's reciprocation cycle so that the heat rejecter cylinder port is entirely covered by the piston sidewall during an inward portion of the piston reciprocation when the engine is operating at the selected maximum engine power. A leaker port extends from a gas bearing cavity through the piston sidewall and is positioned axially outward from the gas bearing pads of the engine's gas bearing system and vents working gas to the engine's back space at a piston amplitude of reciprocation that exceeds the piston's amplitude of reciprocation at maximum engine power. A resilient damping bumper is attached to the outward end of the piston and a displacer gas cushion is disclosed.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: June 18, 2019
    Assignee: Sunpower, Inc.
    Inventor: James Gary Wood
  • Patent number: 10323604
    Abstract: A free-piston Stirling engine that limits piston amplitude and reduces engine power as the piston amplitude increases beyond its maximum power. The inward edge of the heat rejecter cylinder port is located outward of the most inward excursion of the inward end of the piston sidewall during a part of the piston's reciprocation cycle so that the heat rejecter cylinder port is entirely covered by the piston sidewall during an inward portion of the piston reciprocation when the engine is operating at the selected maximum engine power. A leaker port extends from a gas bearing cavity through the piston sidewall and is positioned axially outward from the gas bearing pads of the engine's gas bearing system and vents working gas to the engine's back space at a piston amplitude of reciprocation that exceeds the piston's amplitude of reciprocation at maximum engine power. A resilient damping bumper is attached to the outward end of the piston and a displacer gas cushion is disclosed.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: June 18, 2019
    Assignee: Sunpower, Inc.
    Inventor: James Gary Wood
  • Patent number: 10184694
    Abstract: In a cryogenic refrigerator, a valve switches between a flow passage of a low-pressure refrigerant gas and a flow passage of a high-pressure refrigerant gas. A motor drives the valve. The motor includes a rotor and a stator, the rotor located radially inward of the stator. A casing hermetically houses the rotor and the stator. The stator includes a back yoke and a magnetic member that acts as a magnetic path of an external magnetic field generated outside of the casing, the magnetic member located radially outward of and spaced apart from the back yoke. The magnetic member is hermetically housed in the casing.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: January 22, 2019
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Takaaki Morie
  • Patent number: 10156185
    Abstract: A method of controlling facility power requirements using a thermoacoustic power device is provided that includes determining energy assets in a facility, controlling the energy assets using an appropriately programmed controller across a network having a security system protocol, monitoring outside temperatures and weather, measuring usage of the energy assets using a temperature sensor or an electrical usage sensor to a load-response signal of an on/off operation and usage of the energy assets to identify a specific energy asset by the controller to determine aggregate energy needs of the energy assets, and using a thermoacoustic power device controlled by the controller to generate electricity and heat according to the monitored temperature, weather and energy assets.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: December 18, 2018
    Assignee: Nirvana Energy Systems, Inc.
    Inventors: Lambertus Hesselink, Geoffrey A. Bruder, Mark A. Pickens, Rajesh Batra, Neil W. Troy, Rodger W. Dyson, Jr.
  • Patent number: 10132237
    Abstract: The invention relates to a power unit, in particular for a hybrid vehicle, comprising a reciprocating piston engine and comprising a generator which can be in driving engagement therewith, wherein the reciprocating piston engine has at least two pistons, which are guided in at least two cylinders in tandem arrangement, and two counter-rotating crankshafts, which are connected to the pistons by connecting rods and which are mechanically coupled so as to be in phase, wherein a first generator can be driven by the first crankshaft and a second generator can be driven by the second crankshaft.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: November 20, 2018
    Assignee: OBRIST TECHNOLOGIES GMBH
    Inventors: Franz Laimboeck, Frank Obrist, Tsuneo Konno
  • Patent number: 10100778
    Abstract: Methods, systems, and devices are provided that may include Stirling cycle configurations and/or linear-to-rotary mechanisms in accordance with various embodiments. Some embodiments include a Stirling cycle device that may include a first hot piston contained within a first hot cylinder and a first cold piston contained within a first cold cylinder. A first single actuator may be configured to couple the first hot piston with the first cold piston such that the first hot piston and the first cold piston are on different thermodynamic circuits. The different thermodynamic circuits may include adjacent thermodynamic circuits. The Stirling cycle configuration may be configured as a single-acting alpha Stirling cycle configuration. Some embodiments include a linear-to-rotary mechanism device. The device may include multiple linkages. The device may include a cam plate coupled with the multiple linkages utilizing a cam and multiple cam followers. The linkages may include Watt linkages.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: October 16, 2018
    Assignee: Cool Energy, Inc.
    Inventors: Brian Nuel, Lee S. Smith, Samuel P. Weaver, William Gross, Stefan Berkower
  • Patent number: 10030892
    Abstract: A cryogenic refrigerator includes a cylinder, a displacer accommodated in the cylinder so as to reciprocate inside the cylinder with a gap formed between the periphery of the displacer and the interior surface of the cylinder, and a depressed part formed on at least one of the periphery of the displacer and the interior surface of the cylinder. The ratio of the volume of the depressed part to the volume of the gap satisfies a condition of 8?Vd/Vg?75, where Vd is the volume of the depressed part and Vg is the volume of the gap.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: July 24, 2018
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Takaaki Morie, Mingyao Xu
  • Patent number: 10018380
    Abstract: A cryogenic refrigerator includes a compressor that compresses a working gas; an expansion chamber where the working gas compressed by the compressor expands and generates cooling; a valve mechanism including a stator valve and a rotor valve, which rotates with respect to the stator valve; and a forcing mechanism that applies a force to one of the rotor valve or the stator valve toward the other one of the rotor valve or the stator valve. The valve mechanism is configured to switch a flow of the working gas between the compressor and the expansion chamber as the rotor valve rotates. The forcing mechanism is arranged such that the center of the force applied by the forcing mechanism deviates from the center of the valve mechanism.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: July 10, 2018
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Takaaki Morie, Mingyao Xu
  • Patent number: 10018149
    Abstract: The present invention refers to the technical field of thermodynamic engines, and more specifically to a heat engine that operates with gas in closed loop in differential configuration which is characterized by performing a thermodynamic cycle eight transformations or otherwise explain, it performs two thermodynamic cycles simultaneously, each with four interdependent, additional transformations, two of these transformations “isothermal” and two “adiabatic” in mass transfer in phases of adiabatic processing to provide a new performance curve no longer dependent solely on temperature but the mass transfer rate which allows the construction of machines with high yields and low thermal differentials.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: July 10, 2018
    Assignee: ABX ENERGIA LTDA
    Inventor: Marno Iockheck
  • Patent number: 9964340
    Abstract: In a Stirling refrigerator, a displacer has an internal space. An expander body houses the displacer so that the displacer can be reciprocated. A temperature sensor is arranged in the internal space of the displacer. A displacer rod, having an internal space, may connect to the displacer. A wiring may provide an electrical connection to the temperature sensor, the wiring arranged through the internal space of the displacer rod to outside of the expander body.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: May 8, 2018
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Kyosuke Nakano, Yoshikatsu HIRATSUKA, Kenta Yumoto
  • Patent number: 9909787
    Abstract: A pulse tube refrigerator/cryocooler apparatus including: an inlet for receiving a cyclically moving volume of gas; a regenerator device fluidly connected to the inlet for storing and recovering thermal energy from the gas; a pulse tube fluidly connected to the regenerator; and a conduit fluidly connected at one end to the pulse tube and fluidly connected at its opposite end to a container, said container providing a storage volume for gas, wherein apparatus is configured such that the cyclically moving gas enters the regenerator in a direction parallel to its elongate axis.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: March 6, 2018
    Assignee: THE HYMATIC ENGINEERING COMPANY LIMITED
    Inventors: Scott Spooner, Chun Fai Cheuk
  • Patent number: 9885272
    Abstract: An apparatus includes an exhaust system, a cooling system, and two or more thermoacoustic devices. A first thermoacoustic device is configured to convert heat energy from the exhaust system to amplify an acoustic wave. A second thermoacoustic device configured to convert energy in the amplified acoustic wave to an input for the cooling system. The apparatus may be incorporated or in communication with an engine or a generator.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: February 6, 2018
    Assignee: SDMO INDUSTRIES
    Inventor: Luc Courtes
  • Patent number: 9782828
    Abstract: Systems and methods for forming near net-shape metal parts from binderless metal powder are disclosed. Systems include a mold die that defines a die cavity and may include one or more ultrasonic transducers operatively coupled to the mold die. Systems may be configured to introduce binderless metal powder into a die cavity and/or to compact the binderless metal powder within the die cavity. Methods include introducing binderless metal powder into a die cavity of a mold die and compacting the binderless metal powder within the die cavity to form a green part within the die cavity. The binderless metal powder may include spheroidal metal particles and angular metal particles. The methods may further include separating the green part from the mold die and sintering the green part, after separating, to form a sintered near net-shape metal part.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: October 10, 2017
    Assignee: The Boeing Company
    Inventor: Carey E. Wilkinson
  • Patent number: 9768675
    Abstract: An electromagnetic motor includes a stator and an armature arranged to move substantially linearly relative to the stator in an intended direction during operation of the motor. A first and second flexure are connected to a first end of the armature. Each flexure has a longest portion which lies substantially in a plane that intersects a plane in which the armature lies at a substantially right angle. The flexures allow motion of the armature in the intended direction while resisting motion of the armature in one or more other degrees of freedom.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: September 19, 2017
    Assignee: TA Instruments-Waters L.L.C.
    Inventors: Tom Andrikowich, Troy D. Nickel
  • Patent number: 9620272
    Abstract: A permanent current switch device of a refrigerator cooling-type superconducting magnet includes a superconducting coil cooled by solid thermal conduction and a permanent current switch. A heat transfer member is thermally connected to a cooling stage and is structured to be inserted into and removable from a former of the permanent current switch. Due to differences in thermal expansion between the heat transfer member and the former, a permanent current mode can be stably maintained.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: April 11, 2017
    Assignee: Hitachi, Ltd.
    Inventor: Takeshi Nakayama
  • Patent number: 9620793
    Abstract: [Object] To provide a hybrid system of which overall efficiency is improved. [Solution] A hybrid system of the invention includes: a fuel cell device; and a thermoacoustic cooler. The thermoacoustic cooler 14 includes: a thermoacoustic energy generating section 20 in which thermoacoustic energy is generated by a temperature gradient between a high-temperature side and a low-temperature side; and a cooling section 21 in which a function of cooling is performed in the low-temperature side using the temperature gradient between the high-temperature side and the low-temperature side which is produced when the thermoacoustic energy transmitted from the thermoacoustic energy generating section 20 is converted into energy. The system is configured to cause exhaust gas emitted from the fuel cell device to flow through the high-temperature side of the thermoacoustic energy generating section 20. Therefore, it is possible to achieve the hybrid system of which overall efficiency is improved.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: April 11, 2017
    Assignee: KYOCERA CORPORATION
    Inventors: Takashi Ono, Eizou Matsui
  • Patent number: 9612044
    Abstract: A system includes a pulse tube, a compressor configured to create pulses of fluid in the pulse tube, and a surge tank. The surge tank includes a housing that defines a surge volume configured to receive the fluid from the pulse tube. An inertance channel defines a passageway through which the fluid flows to and from the surge volume. At least part of the inertance channel has an open side to the surge volume. The surge tank also includes an adjustable seal configured to block at least part of the open side of the inertance channel and to move in order to change a functional length of the inertance channel. The housing may include a material having a high coefficient of thermal expansion, and the adjustable seal may include a material having a low coefficient of thermal expansion.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 4, 2017
    Assignee: Raytheon Company
    Inventors: Lowell A. Bellis, Dominic R. Gooden, Michael J. Ellis
  • Patent number: 9335242
    Abstract: An apparatus and method is shown for determining the pumpability limit, freeze point and/or pour point of liquids, particularly fuels, at sub-ambient temperatures. A sample is placed in a viscometer which viscometer is rapidly cooled by a chiller. During cooling, after some measurements of temperature and viscosity, further temperatures and viscosity are approximated using the least squares method, which temperature and viscosity are subsequently measured to determine the pumpability limit. Continuation of the method will also give the freeze point and pour point of the sample being tested.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: May 10, 2016
    Assignee: Cambridge Viscosity, Inc.
    Inventors: Larry Angelo Spino, Daniel Alfred Airey, David Anthony Malaguti, Herve Philippe Cleris, Viachaslau Urvantsau
  • Patent number: 9243520
    Abstract: The present invention relates to apparatus, systems, and methods of managing large quantities of low-grade waste heat energy by 1) generating excess electric power via an ORC process driven by the removal and recovery of waste heat under favorable operating conditions, and 2) utilizing the same apparatus to provide waste heat removal via a refrigeration process that consumes electric power when environmental conditions do not permit operation in the ORC mode. The mode of operation of the system is principally determined by the thermal energy of the waste heat stream and the availability, or lack thereof, of adequate cooling resources. Such resources are often subject to local environmental conditions, particularly ambient temperature which varies on a diurnal and annual basis.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: January 26, 2016
    Assignee: ElectraTherm, Inc.
    Inventors: Andrew Oxner, Hans Wain, August Brautigam
  • Patent number: 9194616
    Abstract: A disclosed cryogenic refrigerator includes a first stage displacer; a first stage cylinder configured to form a first expansion between the first stage cylinder and the first stage displacer; a second stage displacer connected to the first stage displacer; and a second stage cylinder configured to form a second expansion space between the second stage cylinder and the second stage displacer, wherein a helical groove is formed on an outer peripheral surface of the second stage displacer so as to helically extend from a side of the second expansion space toward the first stage displacer, the helical groove communicates with the first expansion space, and a cross-sectional area of the helical groove becomes smaller from a side of the second expansion space to a side of the first expansion space.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: November 24, 2015
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Mingyao Xu, Takaaki Morie
  • Patent number: 9093203
    Abstract: An overvoltage protection element with a housing, an overvoltage-limiting component arranged in the housing, and with two connection elements for electrically connecting the overvoltage protection element to the current or signal path to be protected, wherein, normally, the connection elements are each in electrically conductive contact with a pole of the overvoltage-limiting component.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: July 28, 2015
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Christian Depping, Rainer Durth, Gernot Finis, Thomas Meyer, Andreas Christ
  • Patent number: 9046055
    Abstract: A heat engine comprising compressor and expander displacement elements (210, 211) reciprocating in respective compression and expansion chambers (111, 111?, 102, 102?) and arranged in a linear, free piston configuration, a combustor (116) separate from the compression and expansion chambers (111, 111?, 102, 102?), and a linear energy conversion device (212, 213) providing conversion of solid, liquid, or gaseous fuel into hydraulic, electric, or pneumatic energy by means of subjecting a working fluid to a thermodynamic cycle with substantially constant pressure combustion. The inlet and outlet valves of the compression chamber (102, 102?) and the rate of fuel injection to the combustor (116) are actively controlled by an electronic controller to avoid engine damage, and to maintain thermodynamic efficiency over a wide range of loads.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: June 2, 2015
    Assignee: University of Newcastle Upon Tyne
    Inventors: Rikard Mikalsen, Anthony Paul Roskilly
  • Publication number: 20150135702
    Abstract: A working cylinder is provided, comprising at least one disc-like displacer (120) rotatably supported in a cylindrical block (114), which displacer (120) is arranged between two annular flanges (110) extending radially inwards from said block (114) on each sides of said displacer (120) such that said displacer (120) will be arranged in parallel with said flanges (110) upon rotation, wherein at least one of said flanges (110) comprises a plurality of sections including a first section (112a) having a first temperature, a second section (112b) having a second temperature being lower than said first temperature, and two insulating sections (112c, 112d) completely preventing contact between said first section (112a) and said second section (112b), and wherein said displacer (120) comprises a cutout (122) for rotating a volume of working fluid across the sections (112), which cutout is dimensioned such that for every rotational position it does not overlap the first section (112a) and the second section (112b) at
    Type: Application
    Filed: April 24, 2013
    Publication date: May 21, 2015
    Inventor: Nils KARLBERG
  • Patent number: 9021800
    Abstract: A heat exchanger and associated method are provided that may eliminate or reduce the need for an external mechanical or electrical power source to drive the fan by utilization, instead, of a Stirling engine. A heat exchanger includes a plurality of coils configured to carry a primary fluid. The heat exchanger also includes a fan including a plurality of fan blades configured to force a secondary fluid across the plurality of coils to facilitate heat transfer between the primary and secondary fluids. The heat exchanger also includes a Stirling engine operably connected to the fan and configured to cause rotation of the fan blades. A corresponding method is also provided.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: May 5, 2015
    Assignee: The Boeing Company
    Inventors: David W. Kwok, Jack W. Mauldin
  • Patent number: 8899037
    Abstract: The present invention provides a Stirling engine capable of effectively recovering heat from exhaust gas flowing through a flue, and connecting a heating portion 10 and a regeneration portion 5 with each other through an operation gas tube without providing a flow passage separating portion 110, and the heating portion 10 includes a heating portion head 10a and a heat-transfer tube group, the heating portion head 10a includes first through holes 30R and second through holes 30S, the first through holes 30R are formed closer to a center region of the heating portion head 10a as compared with the second through holes 30S, one ends of U-shaped tubes are mounted in the first through holes 30R and the other ends of them are mounted in the second through holes 30S, and parallel exhaust gas flow passages is formed between the U-shaped tubes.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: December 2, 2014
    Assignee: Estir Co., Ltd.
    Inventors: Teruyuki Akazawa, Tsutomu Nakatsuka, Taeko Tahara, Osamu Sakamoto
  • Patent number: 8857173
    Abstract: A two piston, free piston, alpha Stirling cycle machine has a compression piston with a cylindrical bore that is coaxial with the cylinders in which the pistons reciprocate. An expansion piston sealingly extends into both an expansion cylinder and into the cylindrical bore in the compression piston. The expansion piston has the same diameter within both the expansion cylinder and the cylindrical bore. A spring, preferably a gas spring, drivingly connects the pistons. The reciprocation of the expansion piston varies only the volume of the expansion space and the reciprocation of the compression piston varies only the volume of the compression space. The spring that drivingly connects the pistons allows the two pistons to be properly phased without a mechanical linkage so that they can operate in a thermodynamically effective phase over a range of strokes.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: October 14, 2014
    Assignee: Sunpower, Inc.
    Inventor: William T. Beale
  • Publication number: 20140283511
    Abstract: In one embodiment according to the invention, there is provided a method for generating electrical energy using a thermal cycle of a working gas. The method comprises using the motion of a piston in a cylinder, containing the working gas performing the thermal cycle, to electromagnetically induce current in an electrical circuit coupled to the cylinder; using the electrical circuit to store the electrical energy, produced by the current induced in the electrical circuit, in an electrical storage device; and using the electrical energy stored in the electrical storage device to electromagnetically provide a motive force to the piston. Cyclically using the electrical circuit to store the electrical energy and using the stored energy to provide a motive force to the piston effect a net positive average power transfer into the electrical storage device over the course of the thermal cycle.
    Type: Application
    Filed: March 25, 2014
    Publication date: September 25, 2014
    Applicant: Altor Limited LC
    Inventor: Jonathan R. Wood
  • Patent number: 8820068
    Abstract: A linear, multi-cylinder Stirling cycle machine comprises a plurality of Stirling cycle units arranged in an open series or closed loop. Each of the units comprises a compression space in fluid communication with an expansion space via a regenerative heat exchange assembly. The compression space and expansion space are in fluid communication with, respectively, a compression piston and an expansion piston, and the separate Stirling cycle units are mechanically coupled together by linear power transmitters, which connect the expansion piston of one unit to the compression unit of the other. The linear power transmitters can be linear transducers such as linear motors or generators. In the open series arrangement the series of Stirling cycle units can have an initiating compressor at one end and a terminating expander at the other end. hi the closed loop arrangement, one of the Stirling cycle units can include an exergy throttle to restrict gas flow rates to control the speed of the machine.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: September 2, 2014
    Assignee: ISIS Innovation Limited
    Inventor: Michael William Dadd
  • Publication number: 20140216026
    Abstract: A free-piston type stirling engine 1 includes a power piston 30 which partitions the inside of a case 2 into a work space 80 and a bounce space 90, a displacer 40, a communication hole 32 provided in the power piston 30, a displacer rod 41 extending from the displacer 40 and passing through the communication hole 32, a first displacer supporting spring 50 elastically supporting the displacer rod 41 at its proximal end, and a second displacer supporting spring 60 elastically supporting the displacer rod 41 at its distal end. The power piston 30 and the displacer 40 reciprocate along a central axis X of the case 2 with a phase difference therebetween by expansion and compression of a working gas in the work space 80, and bias forces of the first displacer supporting spring 50 and the second displacer supporting spring 60 restrict tilting of the displacer 40 and the displacer rod 41 with respect to the central axis X.
    Type: Application
    Filed: September 13, 2012
    Publication date: August 7, 2014
    Applicant: ISUZU MOTORS LIMITED
    Inventors: Shou Ozaki, Yasushi Yamamoto, Hirotsugu Yabe
  • Publication number: 20140165551
    Abstract: A Stirling cycle machine. The machine includes at least one rocking drive mechanism which includes: a rocking beam having a rocker pivot, at least one cylinder and at least one piston. The piston is housed within a respective cylinder and is capable of substantially linearly reciprocating within the respective cylinder. Also, the drive mechanism includes at least one coupling assembly having a proximal end and a distal end. The proximal end is connected to the piston and the distal end is connected to the rocking beam by an end pivot. The linear motion of the piston is converted to rotary motion of the rocking beam. Also, a crankcase housing the rocking beam and housing a first portion of the coupling assembly is included. A crankshaft coupled to the rocking beam by way of a connecting rod is also included. The rotary motion of the rocking beam is transferred to the crankshaft.
    Type: Application
    Filed: July 1, 2013
    Publication date: June 19, 2014
    Inventors: Dean Kamen, Christopher C. Langenfeld, Prashant Bhat, Stanley B. Smith, III
  • Patent number: 8752375
    Abstract: An opposed piston gamma type Stirling machine has its displacer driven by a linear electromagnetic transducer that is drivingly linked to the displacer and is located on the opposite side of the power piston's axis of reciprocation from the displacer preferably in the bounce space. The linear transducer is controlled by an electronic control as a function of sensed inputs of Stirling machine operating parameters. In addition to allowing improvements in stability and efficiency, such a Stirling machine operated as a cooler/heat pump can also be controlled so that its displacer can be driven at (1) a phase angle that pumps heat in one direction through the machine or (2) at another phase angle that pumps heat in the opposite direction through the machine and allows selectively switching between the heat pumping directions.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: June 17, 2014
    Assignee: Global Cooling, Inc.
    Inventor: David M. Berchowitz
  • Patent number: 8752380
    Abstract: A solar-thermal concentrator for a expeditionary power generator system including a portable power plant that utilizes a hybridized solar/fuel Stirling engine to supply electric power in an expeditionary setting. The concentrator includes a collapsible dish assembly that is pivotably and tiltably mounted on a portable base assembly, where the dish assembly includes a lightweight frame including a central mounting structure and multiple truss-like radial arms that are rigidly connected to and extend radially from the central mounting structure, and a reflector panel assembly including multiple flat, fan-shaped reflector panels that are secured to the frame and disposed in a semi-circular pattern. Each reflector panel includes multiple reflectors that collectively form a substantially flat Fresnelized reflective surface that redirects incident sunlight into a focal region. The power plant is maintained in the focal region by a support structure that extends perpendicular to the flat reflective surface.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: June 17, 2014
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Patrick C. Cheung, Alexander S. Tuganov, Sean Garner
  • Patent number: 8745809
    Abstract: A cleaning device includes a first expansion unit in which a first expansion member is received and the first expansion unit is connected to a cylinder which has a piston received therein and the piston defines a first room and a second room in the cylinder. The piston has a first magnetic member which magnetically drives a movable member with a second magnetic member connected thereto. The movable member moves along the cylinder. A cleaning unit is co-movably connected with the movable member. By expansion of the first expansion unit by the sun, the movable member is moved and the cleaning unit is moved along the glass surface. The action consumes no electric power.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: June 10, 2014
    Assignee: Kun Shan University
    Inventor: Song-Hao Wang
  • Patent number: 8720198
    Abstract: In one embodiment according to the invention, there is provided a method for generating electrical energy using a thermal cycle of a working gas. The method comprises using the motion of a piston in a cylinder, containing the working gas performing the thermal cycle, to electromagnetically induce current in an electrical circuit coupled to the cylinder; using the electrical circuit to store the electrical energy, produced by the current induced in the electrical circuit, in an electrical storage device; and using the electrical energy stored in the electrical storage device to electromagnetically provide a motive force to the piston. Cyclically using the electrical circuit to store the electrical energy and using the stored energy to provide a motive force to the piston effect a net positive average power transfer into the electrical storage device over the course of the thermal cycle.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: May 13, 2014
    Assignee: Altor Limited LC
    Inventor: Jonathan R. Wood
  • Patent number: 8713934
    Abstract: A free-piston Stirling machine drivingly coupled to at least one rotary electromagnetic transducer. At least one pulley is oriented in a plane of a reciprocating piston connecting rod. At least one motion translating drive link connects the connecting rod to the pulley by at least two straps so that the pulley moves in rotationally oscillating motion. The two straps extend along an arcuate surface of the pulley into connection to the piston rod at two spaced locations. The pulley is linked to a rotary electromagnetic transducer so that both move in rotationally oscillating motion. Preferably a piston spring resonates the piston at an operating frequency of the Stirling machine and a torsion spring resonates the pulley in rotational oscillation at the operating frequency of the Stirling machine.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: May 6, 2014
    Assignee: Global Cooling, Inc.
    Inventor: David M. Berchowitz
  • Patent number: 8701404
    Abstract: In one embodiment according to the invention, there is provided a method for generating electrical energy using a thermal cycle of a working gas. The method comprises using the motion of a piston in a cylinder, containing the working gas performing the thermal cycle, to electromagnetically induce current in an electrical circuit coupled to the cylinder; using the electrical circuit to store the electrical energy, produced by the current induced in the electrical circuit, in an electrical storage device; and using the electrical energy stored in the electrical storage device to electromagnetically provide a motive force to the piston. Cyclically using the electrical circuit to store the electrical energy and using the stored energy to provide a motive force to the piston effect a net positive average power transfer into the electrical storage device over the course of the thermal cycle.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: April 22, 2014
    Assignee: Altor Limited LC
    Inventor: Jonathan R. Wood
  • Patent number: 8677745
    Abstract: A Stirling cycle engine comprised of at least two annular chambers, serving as hot and cold cylinders, which are joined together forming a Figure-8 chamber. A slidable, segmented piston disposed within the Figure-8 chamber, under the influence of thermally induced working fluid pressure changes within the engine, traverses the Figure-8 chamber providing a motive force to generate electric power or transfer mechanical energy external to the engine.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: March 25, 2014
    Inventor: John Stojanowski
  • Patent number: 8671677
    Abstract: An improved free piston Stirling machine having a gamma configuration. The displacer and each piston is reciprocatable within a cylinder having an unobstructed opening at its inner end into a common volume of the workspace. The common volume is defined by the intersection of inward projections of the displacer cylinder and the piston cylinders. The displacer and the pistons each have a range of reciprocation that extends into the common volume. A displacer drive rod is reciprocatable in a drive rod cylinder and both are positioned outside the common volume and on the opposite side of the common volume from the displacer. The displacer is connected to the displacer drive rod by a displacer connecting rod. Importantly, the displacer and pistons have complementary interfacing surface contours formed on their inner ends which substantially reduces the dead volume of this gamma configured machine.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: March 18, 2014
    Assignee: Global Cooling, Inc.
    Inventor: David M. Berchowitz
  • Patent number: 8649954
    Abstract: A system for controlling angular position of stator blades including: a mechanism for calculating a set angular position of the blades according to one of speeds; and a module for correcting the set position including: a mechanism for determining the angular position of the blades; a mechanism for measuring fuel flow rate of the turbine engine; a memory unit in which consecutive angular positions of the blades are combined with the fuel flow rates of the turbine engine measured at the angular positions; and a mechanism for determining a correcting angle according to the difference between the fuel flow rates measured between two consecutive angular position of the blades. A method for optimizing the common angular position can utilize the system.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: February 11, 2014
    Assignee: SNECMA
    Inventors: David Julien Boyer, Cedrik Djelassi, Julien Alexis Louis Ricordeau
  • Patent number: 8640454
    Abstract: A Stirling Cycle device including a plurality of Stirling Cycle machines, each operating out of phase with the other Stirling Cycle machines and sharing at least one heat exchanger flow path.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 4, 2014
    Inventor: Jonathan P. Nord
  • Patent number: 8615993
    Abstract: A bearing support system for a piston and its connecting rod in which the bearing system supports the combined piston and connecting rod by only two bearings, a gas bearing at the piston and a radially acting spring bearing at its connecting rod. A non-compliant connecting rod is fixed to an end of a piston which has a clearance seal length in the range of 0.3 times the diameter of the piston and 1.5 times the diameter of the piston. The distance from the gas bearing to the effective point of connection of the radially acting spring bearing to the connecting rod is greater than the seal length of the piston. The piston and connecting rod unit is not supported by additional bearings that introduce additional alignment problems.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: December 31, 2013
    Assignee: Global Cooling, Inc.
    Inventors: David M. Berchowitz, Yong-Rak Kwon