Abstract: A fuel injector comprises a body having a longitudinal axis, a length-changing solid state actuator that has first and second ends, a closure member coupled to the first end of the solid state actuator, and a compensator assembly coupled the second end of the solid state actuator. The solid state actuator includes a plurality of solid state elements along the axis between the first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the solid state actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect.

Abstract: The invention relates to a method for simultaneously detecting mutations in different nucleotide sequences and for determining the transcription rate of mutated and non-mutated nucleotide sequences. The inventive method comprises the following steps: hybridizing single-stranded sample nucleotide sequences to single-stranded reference nucleotide sequences, fixating, before or during hybridization, single-stranded reference nucleotide sequences or single-stranded sample nucleotide sequences, or fixating, after or during hybridization, heteroduplices from reference and sample nucleotide sequences on an electronically addressable surface, incubating them with a substrate that recognizes heteroduplex mismatches, and detecting the substrate bonds.

Abstract: A fuel injector comprises a body having a longitudinal axis, a length-changing actuator that has first and second ends, a closure member coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator includes first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the-use of elastomer seals to thereby reduce a slip stick effect. Also, a method of compensating for thermal expansion or contraction of the fuel injector comprises providing fuel from a fuel supply to the fuel injector; and adjusting the actuator with respect to the body in response to temperature variation.

Abstract: The present invention relates to peptidic domains which can be readily synthesized and which can specifically recognize and bind nucleic acid sequences and to a method for finding and providing peptide domains which bind specifically to DNA and biomorphic factors derived therefrom, in particular transcription factors and repressors.

Abstract: A fuel injector comprises a body having a longitudinal axis, a length-changing actuator that has first and second ends, a closure member coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator includes first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect. Also, a method of compensating for thermal expansion or contraction of the fuel injector comprises providing fuel from a fuel supply to the fuel injector; and adjusting the actuator with respect to the body in response to temperature variation.

Abstract: A fuel injector comprises a body having a longitudinal axis, an length-changing actuator that has first and second ends, a closure member coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator includes first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect.

Abstract: A fluid dosing device for a pressurized liquid is disclosed, which comprises a chamber (35) which is supplied with pressurized liquid by means of a liquid supply line (17, 19); a valve needle (9) which is guided through the chamber (35), the first end section of said valve needle being able to be lifted and the second end section thereof forming a valve in conjunction with a valve seat disposed on the housing (3). Metal bellows (33) are provided as a leadthrough element for the first end section of the valve needle (9). The metal bellows seal the chamber in said region in a tight manner. A throttle point (37, 39) is provided between the valve needle (9) and the inner wall of the chamber between the metal bellows (33) and the mouth (18) of the liquid supply line (17) leading into the chamber.

Abstract: An electromechanical motor and method for operating same result in a motor low-wear, quiet, slip-free and simple structure, wherein the drive shaft is driven free of bending moments, can be arrested in quiescent position and can be operated at low speed. A drive ring is disposed for line contact with the shaft and moved by a combination of linear displacements of respective electromechanical drive elements to execute a circulatory motion.

Abstract: The invention relates to an injection valve which has a piezo actuator that is functionally connected to a nozzle needle by a hydraulic transmission device. The hydraulic transmission device is connected to a pressure reservoir by a sealing gap so that the pressure differences between the pressure reservoir and a hydraulic chamber of the hydraulic transmission device are compensated in the long term.

Abstract: A metering device and method for delivering fluid that employs a compensating element. The metering device has a housing defining a fluid chamber that contains a pressurized fluid. The-housing further encloses an actuating drive, a valve needle and a compensating element. The housing terminates at a housing opening for delivery of fluid to the outside of the housing. Fluid is delivered from the housing by moving the actuating drive which in turn displaces the valve needle in an opening direction. Upon displacement of the valve needle, the valve needle moves axially in the opening direction with little, if any, lift loss due to the compensating element. The compensating element further acts to compensate for shifting or movement of metering components due to external factors, such as varying thermal loads, aging effects, and settling effects.

Abstract: For diagnosing coupled piezo-mechanical systems, methods are used which utilize electrical characteristic curves of the piezo-element that is contained in the piezo-mechanical systems. These electrical characteristic curves contain information about the mechanical condition of the overall piezo-mechanical system, which can be interpreted by suitable evaluating methods. It is thus possible to perform a diagnosis in which malfunctions and failures of the piezo-mechanical system can be detected (e.g. wear or failure of particular components). An important field of application is the diagnosis of fuel injectors which are controlled via piezo-actuators.

Abstract: A fuel injector comprises a body having a longitudinal axis, an length-changing actuator that has first and second ends, a closure member coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator includes first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect.

Abstract: A fuel injector comprises a body having a longitudinal axis, a length-changing actuator that has first and second ends, a closure member coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator includes first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect. Also, a method of compensating for thermal expansion or contraction of the fuel injector comprises providing fuel from a fuel supply to the fuel injector; and adjusting the actuator with respect to the body in response to temperature variation.

Abstract: A fuel injector comprises a body having a longitudinal axis, a length-changing solid state actuator that has first and second ends, a closure member coupled to the first end of the solid state actuator, and a compensator assembly coupled the second end of the solid state actuator. The solid state actuator includes a plurality of solid state elements along the axis between the first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the solid state actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect.

Abstract: A fuel injector comprises a body having a longitudinal axis, a length-changing actuator that has first and second ends, a closure member coupled to the first end of the length-changing actuator, and a compensator assembly coupled the second end of the actuator. The length-changing actuator includes first and second ends. The closure member is movable between a first configuration permitting fuel injection and a second configuration preventing fuel injection. And the compensator assembly axially positions the actuator with respect to the body in response to temperature variation. The compensator assembly utilizes a configuration of at least one spring disposed between two pistons so as to reduce the use of elastomer seals to thereby reduce a slip stick effect. Also, a method of compensating for thermal expansion or contraction of the fuel injector comprises providing fuel from a fuel supply to the fuel injector; and adjusting the actuator with respect to the body in response to temperature variation.

Abstract: A wobble motor has at least one shaft guided in a rotatably and axially displaceable fashion, and at least one drive ring which surrounds the shaft and can be tilted with respect to a longitudinal axis of the shaft. The at least one guide ring can be displaced in a frictionally locked fashion and free from rotation.

Abstract: A stroke transmission apparatus includes a displaceable stroke element, a drive element and at least one lever, which is respectively seated on the drive element and can be applied to the stroke element and to a bearing, so that with a simultaneous seating of the lever on the stroke element, on the drive element and on the bearing, a primary stroke (xp) can be transmitted to the stroke element via a lever effect of the lever, and with a changing primary stroke (xp), a stroke factor (II) can be modified by modifying at least one contact point.

Abstract: A wobble motor has at least one shaft guided in a rotatably and axially displaceable fashion, and at least one drive ring which surrounds the shaft and can be tilted with respect to a longitudinal axis of the shaft. The at least one guide ring can be displaced in a frictionally locked fashion and free from rotation.

Abstract: A fluid metering device that employs a sealing element for delivering a metered dose of a pressurized fluid. The sealing element includes a metal bellows sealing element or metal bellows that attaches to a valve needle and a housing. The metal bellows includes a number of corrugated elements for sealingly guiding said valve needle as the valve needle moves to deliver the metered dose of pressurized fluid.

Abstract: A piezoelectric multilayer actuator made of at least two individual piezoelectric layers which can be driven electrically by at least one electrode, wherein the actuator exhibits a hexagonal cross-sectional geometry.