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| Number | Title | Issue Date |
| 7540728 | Method of transforming a motion in a volume screw machine of rotary type and rotary screw machine In order to more effectively use the constructional volume of a volume screw machine of rotary type, a plurality of sets (80, 70; 60, 50) of female elements having an inner screw surface and of male elements having an outer screw surface is provided, wherein ... | 06/02/2009 |
| 7491046 | Piston for a rotary combustion engine A rotary combustion engine with at least one working unit, which has essentially a peripheral engine housing, a side housing plate on one side, a side housing plate on the power takeoff side, a triangular piston, and an eccentric shaft. The piston is configured of s... | 02/17/2009 |
| 7434563 | Rotary engine The rotary engine includes a cylinder body having a cylinder chamber, an intake port, an exhaust port, and a spark plug, and a rotor which is received in the cylinder chamber to eccentrically rotate while coming into contact at seal faces thereof with an inner circu... | 10/14/2008 |
| 7367567 | Low leakage finger seal A seal for an exhaust duct includes a metal mesh member sandwiched between an outer plate and an inner plate. The seal includes a plurality of flexible members defined by a plurality of slots in both the inner and outer plates. The flexible members provide for expan... | 05/06/2008 |
| 7350500 | Inverted cardioid engine An internal combustion engine comprising a support structure, including a tube and a hollow stator core, supported by and rigidly affixed to the tube. Additionally, a rotor assembly is eccentrically and rotatably mounted about the stator core and having a pair of pa... | 04/01/2008 |
| 7347135 | Water pressure driven generator A fluid pressure driven generator which includes a generator housing and a rotor positioned within the generator housing. A power shaft is positioned in the rotor with a moment arm connected between the power shaft and rotor. A high fluid pressure inlet will be form... | 03/25/2008 |
| 7303380 | Rotary engine with improved seal assembly Corner seal sockets (26) are formed at the end of apex seal slots (58) formed in a rotor (10). A twisted split washer spring (70) is positioned in each socket (26) between the base wall (28) of the socket (26) and the... | 12/04/2007 |
| 7281513 | Inverted Wankel An internal combustion engine comprising a support structure, including a tube and a hollow stator core, supported by and rigidly affixed to the tube. Additionally, a rotor assembly is eccentrically and rotatably mounted about the stator core and having a pair of pa... | 10/16/2007 |
| 7275919 | Rotary engine seal assembly Corner seal sockets (26) are formed at the end of apex seal slots (58) formed in a rotor (10). A twisted split washer spring (70) is positioned in each socket (26) between the base wall (28) of the socket (26) and the... | 10/02/2007 |
| 7264452 | Rotor position control for rotary machines Improved rotor position control for rotary machines allows for positioning mechanisms which are more compact, relative to the stroke of the machine. A crank having a center shaft which extends through the rotor chamber is rotatably mounted in a forward in wall of th... | 09/04/2007 |
| 7264454 | Rotary combustion engine with an improved inner seal A rotary combustion engine includes a peripheral housing, a front housing plate, a rear housing plate, a piston, and an eccentric shaft, where the piston rotates to form three working spaces separated from each other by the tips of the piston. Shaft seals and piston... | 09/04/2007 |
| 7234924 | Rotary combustion engine with device for conveying lubricating oil A rotary combustion engine with one or more working units, which include a peripheral housing, a front housing plate, a rear housing plate on the output side, an eccentric shaft, and a piston, where the eccentric shaft includes an eccentric, and front and rear seali... | 06/26/2007 |
| 7185492 | Stirling engine having slidable piston The present invention is a rotary engine having a rotor and a slidable piston that are contained within a stator. ... | 03/06/2007 |
| 7162860 | Diagnosis system of exhaust aftertreatment apparatus for internal combustion engine A diagnosis system of an exhaust aftertreatment apparatus for an internal combustion engine is arranged to execute a first deterioration diagnosis of the exhaust aftertreatment apparatus on the basis of a change of a catalyst downstream side air/fuel ratio relative ... | 01/16/2007 |
| 7143587 | Low frequency pulse tube system with oil-free drive A pulse tube system for generating refrigeration for uses such as in magnetic resonance imaging systems wherein an oil-free compressor operating at a higher frequency generates pulsing gas which undergoes a frequency reduction and drives the pulse tube system at a m... | 12/05/2006 |
| 7117663 | Air breathing, hydrogen fueled jet engine for high speed aircraft A hydrogen fueled jet engine for hypersonic aircraft. The compressor of the jet engine is driven directly by a dual-acting rotary piston engine. Heated, high pressure hydrogen is delivered to the rotary piston engine for expansion therein. The crankshaft of the rota... | 10/10/2006 |
| 7117840 | Rotary piston machine with an oval rotary piston guided in an oval chamber A rotary piston machine with a housing forming a prismatic cavity with a cavity wall. The cross section of the prismatic cavity is a cavity oval. A rotary piston is guided for rotary movement in the cavity. The rotary piston moves in consecutive intervals of motion ... | 10/10/2006 |
| 7097436 | Apex split seal A rotary machine including a rotor having apexes provided with apex seals achieves better efficiency through the use of apex split seals which minimize leakage across the apex seals to thereby allow operation at relatively high pressure values. ... | 08/29/2006 |
| 7051698 | Rotary drive mechanism A rotary drive mechanism for use as a motor, pump or compressor. The mechanism includes a housing having a chamber defined by a peripheral wall. A rotor is rotatably mounted in the chamber and has two longitudinal seal edges in contact with the wall. The rotor is mo... | 05/30/2006 |
| 7028763 | Cooling arrangement and method with selected surfaces configured to inhibit changes in boiling state Heat transfer in coolant circuits, as in an internal combustion engine for example, can be beneficially enhanced by maintaining the coolant in a nucleate boiling state, but undesirable transitions to a film boiling state are then possible. The disclosed coolant circ... | 04/18/2006 |
| 7004636 | Machine housing The concept of the invention is based on a machine housing with a bearing housing, the bearing seat of which is connected to a housing wall of the machine housing by a bearing housing wall provided with ribs (42, 43) and is subjected to radially directed forc... | 02/28/2006 |
| 7001162 | Compressor assembly A guided rotor compressor that contains at least three hollow rollers, each of which has a sheath surrounding a core. The coefficient of friction of the sheath and the core is from about 0.01 to about 0.15, but the coefficient of friction of the core is at least 1.2... | 02/21/2006 |
| 6983729 | Rotary piston machine A rotary piston machine having a housing defining a prismatic chamber the cross section of which forms an oval of odd order. A rotary piston is guided in the chamber and, in each position, subdivides the chamber into two working chambers. Piston-fixed instantaneous ... | 01/10/2006 |
| 6928977 | Adapter, to interface counter-rotating torque producing engine mechanisms with stationary support accessories, for torque free output and torque sensitive environments The present invention is a novel hydraulic/electric, rotating interface for torque producing engines, including internal combustion engines, which enables a rigidly mounted motor to isolate the power/torque producing components from other stationary accessories, to ... | 08/16/2005 |
| 6919119 | Electronic and opto-electronic devices fabricated from nanostructured high surface to volume ratio thin films An electronic or opto-electronic device or a chemical sensor comprising: an interpenetrating network of a nanostructured high surface area to volume ratio film material and an organic/inorganic material forming a nanocomposite. The high surface area to volume film m... | 07/19/2005 |
| 6892692 | Rotary piston engine and method of operation The present invention relates to a design and method of operation of an improved rotary piston engine. In particular, a preferred embodiment of the present invention is directed to a rotary engine with improved reliability, comprising a housing, having side portions... | 05/17/2005 |
| 6887053 | Rotary piston engine in trochoidal design In a rotary piston engine in trochoidal design with a rotor housing, made of light metal, and with side parts, which are made of light metal, it is provided that the bearing bodies are connected in an area, in which the maximum gas pressures develop, by means of tie... | 05/03/2005 |
| 6761144 | Rotary engine with counter-rotating housing and output shaft mounted on stationary spindle A counter-rotating rotary-piston engine has an output shaft with a cylindrical inner cavity rotatably mounted on a single support spindle in the frame of an aircraft. The output shaft extends substantially through the length of the engine block, which is suitably jo... | 07/13/2004 |
| 6676385 | Compressor assembly A rotary device containing a housing having a curved inner surface with a profile equidistant form a trochoidal curve, an eccentric mounted on a shaft disposed within the housing, a rotor mounted on the eccentric shaft which contains at least three sides,... | 01/13/2004 |
| 6672065 | Multiple stage compressor with rotors using rollers A multistage compressor assembly containing at least two guided rotor compressor stages, each of which contains an eccentric mounted on a shaft located within a housing, a rotor mounted on the eccentric shaft which contains at least three intersecting fac... | 01/06/2004 |
| 6575719 | Planetary rotary machine using apertures, volutes and continuous carbon fiber reinforced peek seals Apertures through each face of a planetary rotor, volutes for low loss delivery and collection of fluid to and from the working volumes of a planetary rotary pump, compressor, or turbine, and zero clearance seals by using continuous carbon fiber reinforce... | 06/10/2003 |
| 6520754 | Compressor unit for refrigeration A compressor for a refrigeration unit having a stator, a rotor orbiting in engagement with the stator to cyclically open, fill with refrigerant gas from at least one inlet port, compress and discharge compressed refrigerant gas through at least one discha... | 02/18/2003 |
| 6481989 | Trochoidal design rotary piston engine and method of making same In a trochoidal design rotary piston engine, side disks are intended to be assembled from one cast side section and a cover disk, where the side section and the cover disks are used in a sealing function. The side section includes cast in reinforcing ribs... | 11/19/2002 |
| 6474965 | Rotary piston engine having a cogwheel pump and an oil metering pump A trochoidal design rotary piston engine design has an external axis cogwheel oil pump which has a smaller diameter drive cogwheel which drives a larger diameter size cogwheel where the larger diameter size cogwheel is coupled to an oil-metering pump. The... | 11/05/2002 |
| 6301898 | Rotary positive displacement device A rotary device containing a housing having a curved inner surface with a profile equidistant from a trochoidal curve, an eccentric mounted on a shaft disposed within the housing, a rotor mounted on the eccentric shaft which contains at least three inters... | 10/16/2001 |
| 6213744 | Phased rotary displacement device A rotary device containing a housing with two side plates, a shaft, an eccentric connected to the shaft, a rotor mounted on the shaft, a first gear, and a second gear. The rotor contains at least 3 sides, the housing has an interior surface defined by at ... | 04/10/2001 |
| 6168405 | Wankel type pump for transporting fluid with entrained particulate matter A quiet, inexpensive pump especially adapted for transporting fluid having particulate matter entrained therein comprises a one-piece housing having a chamber therein with an epitrochoidal planform satisfying the equation: x=(a+b).multidot.cos(t)-c.multidot.co... | 01/02/2001 |
| 6158992 | Rotary pump having a substantially triangular rotor A rotary pump includes a substantially triangular rotor rotatably arranged in a housing and including vertexes which are in slide contact with a trochoid curved surface of the inner periphery of the housing. The housing and the rotor cooperate with each o... | 12/12/2000 |
| 6146120 | Rotary engine having an improved rotor structure A rotary engine includes a rotary shaft, a rotary piston carried by the shaft, a bearing structure supporting the shaft on one side of the rotary piston and a counterweight carried by the shaft on another side of the rotary piston. An air/fuel/oil charge ... | 11/14/2000 |
| 6106250 | Lobed-rotor-type pump having a communication passage between working-fluid chambers A lobed rotor-type pump has a drive shaft, a pump housing, an eccentric rotor journal, a rotor, three working-fluid chambers, intake and discharge ports, and a communication passage. The pump housing has a circumferentially-extending peri-trochoidal curve... | 08/22/2000 |
