Patents by Inventor Joachim Kretschmer
Joachim Kretschmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7571610Abstract: Extendible exhaust nozzle bell for rocket engine of aircraft or spacecraft includes a first part with smaller diameter fixedly arranged on motor of engine and a second part with larger diameter arranged in flexible manner with respect to first part. In a front stowed position, second part is located surrounding first part closer to the rocket motor and, in a rear operating position, first part is arranged further away from the rocket motor. A closed volume that can be acted on by a gaseous fluid causes an extension of the second part of the exhaust nozzle bell from the stowed position into the operating position. The closed volume is formed at least in part by a deformable rolling bellows arrangement coupled between the flexibly arranged second part of the exhaust nozzle bell and a fixed part of the rocket engine or of the aircraft or spacecraft.Type: GrantFiled: March 19, 2004Date of Patent: August 11, 2009Assignee: EADS Space Transportation GmbHInventor: Joachim Kretschmer
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Publication number: 20090178415Abstract: Extendible exhaust nozzle bell for rocket engine of aircraft or spacecraft includes a first part with smaller diameter fixedly arranged on motor of engine and a second part with larger diameter arranged in flexible manner with respect to first part. In a front stowed position, second part is located surrounding first part closer to the rocket motor and, in a rear operating position, first part is arranged further away from the rocket motor. A closed volume that can be acted on by a gaseous fluid causes an extension of the second part of the exhaust nozzle bell from the stowed position into the operating position. The closed volume is formed at least in part by a deformable rolling bellows arrangement coupled between the flexibly arranged second part of the exhaust nozzle bell and a fixed part of the rocket engine or of the aircraft or spacecraft.Type: ApplicationFiled: March 19, 2004Publication date: July 16, 2009Applicant: EADS Astrium GmbHInventor: Joachim Kretschmer
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Publication number: 20080193870Abstract: The invention relates to a toner powder wherein the individual toner particles of the toner powder contain colorants incorporated into at least one polymer, in particular, pigments. The initial product of the polymer consists of a liquid phase based on a monomer and/or oligomer. Subsequently, the colorants, in particular pigments, are dispersed in said liquid phase. Fine drops having a predetermined drop size are produced from the dispersion. A polymerization reaction of the monomers and/or the oligomers in order to form the polymer is then provoked in the individual drops by exposing the drops to electromagnetic waves or electrons, whereby the polymerized drops form the toner particles of the toner powder. The invention also relates to a system for the production of toner powder in addition to toner powder itself.Type: ApplicationFiled: January 28, 2005Publication date: August 14, 2008Inventors: Hans Paffhausen, Ulrich Morf, Joachim Kretschmer
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Publication number: 20050018014Abstract: An ink cartridge is disclosed for insertion into a cartridge receptacle of an inkjet printer. The ink cartridge, on one side wall, has a locking snap member, which protrudes from the side wall and on which a detent edge is embodied, with which the locking snap member can be locked to a locking opening, provided on the cartridge receptacle, in its locking position for locking the ink cartridge in the cartridge receptacle. The locking snap member has a hinged portion, which with its pivot axis extends approximately parallel to the introduction plane (E) of the ink cartridge, in which the ink cartridge is to be inserted into the cartridge receptacle. The hinged portion is adjoined by a detent portion, on which a detent edge extending transversely to the introduction plane (E) is embodied.Type: ApplicationFiled: May 27, 2004Publication date: January 27, 2005Inventors: Rene Butty, Joachim Kretschmer, Markus Moser, Daniel Sulser
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Patent number: 6637188Abstract: A combustion chamber for a rocket engine expels a hot stream of gas and has a cooling device. The inner wall of the combustion chamber adjoins the cooling device and contains depressions formed in such a way that the stable outer layer of the stream of gas that forms in the proximity of the inner wall of the combustion chamber during operation of the combustion chamber is destabilized in the area of the depressions.Type: GrantFiled: November 2, 2001Date of Patent: October 28, 2003Assignee: Astrium GmbHInventors: Peter Bichler, Hans Immich, Joachim Kretschmer, Günther Schmidt
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Patent number: 6554381Abstract: A system is provided for registration of a fluid level of a fluid in the fluid chamber of an invention-specific receptacle (1), in particular of ink in an ink cartridge, with a light source (11) which beams into the chamber of the receptacle, a reflection body (2) which is designed as a float, which moves in the chamber of the receptacle in dependency upon the filling level of the fluid and which variably reflects the light in dependency upon its movement, and a light detector (10) which receives a variable amount of light.Type: GrantFiled: April 17, 2001Date of Patent: April 29, 2003Assignee: Pelikan Produktions AGInventors: Philippe Georges Locher, Markus Bürgin, Joachim Kretschmer
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Patent number: 6543135Abstract: A regeneratively coolable nozzle for a rocket engine is formed by winding a tubular material (6) onto a winding mandrel to produce a helical composite structure (5), through which a coolant can flow during operation of the nozzle. The spiral composite structure (5) is fixed temporarily and the fixed composite structure (5) is removed from the winding mandrel. Then an inner heat resistant, load bearing layer (9) is applied to the radially inner hot-gas facing surface (H) of the fixed composite structure (5). The present nozzle is lightweight and withstands a high coolant pressure.Type: GrantFiled: October 18, 2001Date of Patent: April 8, 2003Assignee: Astrium GmbHInventor: Joachim Kretschmer
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Patent number: 6536208Abstract: Device for supplying fuel for a rocket propulsion unit has a first and at least a second fuel circuit for respective different fuels. Each fuel is brought to an increased energy level by a pump and is supplied for combustion by way of injection elements. The first fuel is heated in cooling channels extending in a propulsion chamber wall before the fuel is supplied for combustion, and the first fuel is subsequently fed to at least the turbines assigned to the pumps. A heat exchanger is provided in which the fuel coming from the turbines is in a heat exchange with a fuel coming from a pump. A heat exchanger especially usable in the device for supplying fuel is provided.Type: GrantFiled: October 31, 2001Date of Patent: March 25, 2003Assignee: Astrium GmbHInventor: Joachim Kretschmer
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Patent number: 6470671Abstract: A regeneratively coolable nozzle for a rocket engine is formed by winding a tubular material (6) onto a winding mandrel to produce a helical composite structure (5), through which a coolant can flow during operation of the nozzle. The spiral composite structure (5) is fixed temporarily and the fixed composite structure (5) is removed from the winding mandrel. Then an inner heat resistant, load bearing layer (9) is applied to the radially inner hot-gas facing surface (H) of the fixed composite structure (5). The present nozzle is lightweight and withstand a high coolant pressure.Type: GrantFiled: March 30, 2000Date of Patent: October 29, 2002Assignee: Astruim GmbHInventor: Joachim Kretschmer
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Publication number: 20020092291Abstract: A combustion chamber for a rocket engine expels a hot stream of gas and has a cooling device. The inner wall of the combustion chamber adjoins the cooling device and contains depressions formed in such a way that the stable outer layer of the stream of gas that forms in the proximity of the inner wall of the combustion chamber during operation of the combustion chamber is destabilized in the area of the depressions.Type: ApplicationFiled: November 2, 2001Publication date: July 18, 2002Inventors: Peter Bichler, Hans Immich, Joachim Kretschmer, Gunther Schmidt
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Publication number: 20020056762Abstract: A regeneratively coolable nozzle for a rocket engine is formed by winding a tubular material (6) onto a winding mandrel to produce a helical composite structure (5), through which a coolant can flow during operation of the nozzle. The spiral composite structure (5) is fixed temporarily and the fixed composite structure (5) is removed from the winding mandrel. Then an inner heat resistant, load bearing layer (9) is applied to the radially inner hot-gas facing surface (H) of the fixed composite structure (5). The present nozzle is lightweight and withstands a high coolant pressure.Type: ApplicationFiled: October 18, 2001Publication date: May 16, 2002Applicant: DaimlerChrysler AGInventor: Joachim Kretschmer
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Publication number: 20020005869Abstract: A system is provided for registration of a fluid level of a fluid in the fluid chamber of an invention-specific receptacle (1), in particular of ink in an ink cartridge, with a light source (11) which beams into the chamber of the receptacle, a reflection body (2) which is designed as a float, which moves in the chamber of the receptacle in dependency upon the filling level of the fluid and which variably reflects the light in dependency upon its movement, and a light detector (10) which receives a variable amount of light.Type: ApplicationFiled: April 17, 2001Publication date: January 17, 2002Inventors: Philippe Georges Locher, Markus Burgin, Joachim Kretschmer
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Publication number: 20010042946Abstract: In order to reduce the throughput times of a manufacturing process and the space required for the manufacturing facilities for a plastic injection molding that is laminated with a textile fabric, a non-woven or the like, particularly a piece of interior trim for an automobile, a process is provided comprising the following steps: loading of a fabric blank, which is coated on a first side facing the injection molding with a plastic film that is thermoformable and, when cooled, dimensionally stable and elastic; preforming the fabric blank into the desired outer contour of the injection molding to be manufactured; inserting the preformed fabric blank into the injection mold; injection-backing the fabric blank with plastic; and ejecting the laminated injection molding.Type: ApplicationFiled: December 13, 2000Publication date: November 22, 2001Applicant: Montaplast GmbHInventors: Frank Schlieber, Joachim Kretschmer
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Patent number: 6286925Abstract: The printhead has a multitude of adjacently arranged channels with piezo-electrical shear converters. The impulse form for activation of the converters—depending upon the number of simultaneously activated neighboring channels—is changed in such manner that the exit velocity of the ink droplets is constant. This makes it possible to obtain a better print image.Type: GrantFiled: October 7, 1997Date of Patent: September 11, 2001Assignee: Pelikan Produktions AGInventors: Joachim Heinzl, Alfred Zollner, Peter Möstl, Gerhard Beurer, Joachim Kretschmer
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Patent number: 6164758Abstract: Process for re-coding of print heads equipped with electronic codings, whereby the coding of an original print head A is altered in such manner that it is identical to that of another print head B. This is attained by interruption of conductive connections between contacts and the placement of new conductive connections between contacts of the print head A in accordance with the conductive connections of print head B. The re-coding can be designed in reversible as well as irreversible form.Type: GrantFiled: November 25, 1998Date of Patent: December 26, 2000Assignee: Pelikan Produktions AGInventor: Joachim Kretschmer
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Patent number: 5881716Abstract: The device has a current supply (1) connected to a control unit (2) including operating keys (3). The operating keys (3) provide for the inputting of a selectable dose amount or dosage per time unit or dose period. A liquid reservoir (5) stores fluid to be expelled. A droplet generator (8) includes a plurality of jets (13) connected to piezo-electrical or thermo-electrical converters which generate heat. Each jet and associated converter is individually controlled by the control unit. The device provides exact dosing of extremely small amounts of liquid, for example in the medicinal field, specifically with respect to inhalators or infusion instruments.Type: GrantFiled: September 20, 1996Date of Patent: March 16, 1999Assignee: Pelikan Produktions AGInventors: Alfred Wirch, Joachim Kretschmer
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Patent number: 5638683Abstract: A fluidic nozzle which is flown through by a singular injection jet and which periodically deflects the injection jet. The nozzle has a nozzle channel, whose cross section is expanded in relation to the injection jet, and with control openings opening into the nozzle channel downstream close to the neck of the nozzle for injecting a control fluid that brings about the deflection of the jet. The nozzle channel has a channel cross section, which is two-dimensionally expanded in height and width in relation to the cross section of the jet, with a cross-section contour corresponding to the desired distribution cross section, and it is provided with a number of control openings. The control openings are arranged offset in relation to one another in the circumferential direction of the nozzle channel and are activated one after another in sequence to generate a jet movement rotating along the circumference of the nozzle channel.Type: GrantFiled: December 15, 1994Date of Patent: June 17, 1997Assignee: Daimler-Benz Aerospace AGInventor: Joachim Kretschmer
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Patent number: 5351480Abstract: A jet engine having at least one combustion chamber with a propelling nozzle connected behind it, achieves in a constructionally simple manner and with a high propulsion effect a cross-sectional configuration of a hot gas flow duct bounded by the propelling nozzle that is highly variable with respect to the nozzle throat area as well as to the outlet area. The propelling nozzle contains a divergent lengthening part which is axially movable for the outlet-side expansion of the hot-gas flow duct. In the moved-out position, the lengthening part connects essentially in the corresponding shape to the divergent outlet end of the nozzle outer wall fixed to the engine and, in the moved-in condition, forms together with it an air outlet duct which encloses the fixed nozzle wall end in a ring-shaped manner and whose cross-section can be regulated.Type: GrantFiled: July 12, 1993Date of Patent: October 4, 1994Assignee: Deutsche Aerospace AGInventor: Joachim Kretschmer