Abstract: A method for producing a welded connection between a first workpiece and a second workpiece and also an apparatus for carrying out the method are illustrated and described.
Abstract: The invention relates to a metal-containing, hydrogen-storing material which contains a catalyst for the purpose of hydration or dehydration, said catalyst being a metal carbonate. The method for producing such a metal-containing, hydrogen-storing material is characterized by subjecting the metal-containing material and/or the catalyst in the form of a metal carbonate to a mechanical milling process.
Type:
Application
Filed:
August 12, 2004
Publication date:
March 29, 2007
Applicant:
GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH
Inventors:
Gagik Barkhordarian, Thomas Klassen, Rudiger Bormann
Abstract: The invention illustrates and describes an apparatus for friction stir welding having a pin (3) and a first friction surface segment (4), the pin (3) and the first friction surface segment (4) being driven in rotation about an axis of rotation (6), and the first friction surface segment (4) having a first friction surface (5) for resting on a workpiece (2), as well as a friction stir welding process. The object of providing an apparatus and a process for friction stir welding which allow better setting of the properties of the weld seam is achieved byvirtue of the fact that there is a feed device for introducing a filler material into the weld seam.
Type:
Application
Filed:
June 27, 2006
Publication date:
December 28, 2006
Applicant:
GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH
Inventors:
Rudolph Zettler, Shahram Sheikhi, Mathias Beyer, Jorge dos Santos, Arne Roos, Henry Loitz
Abstract: The invention illustrates and describes an apparatus for friction stir welding, having a pin (3) and a first friction surface segment (4), the pin (3) and the first friction surface segment (4) being rotationally driven about an axis of rotation (6), and the first friction surface segment (4) having a first friction surface (5) for resting on a workpiece (2). The object of providing a friction stir welding apparatus which can be used to better set the energy which is introduced into the workpiece by way of the friction between pin and friction surface, on the one hand, and workpiece, on the other hand, is achieved by virtue of the fact that a first inner segment (7) is provided, having a first inner friction surface (8) for resting on a workpiece (2, 2?), that the first inner segment (7) surrounds the pin (3), that the first friction surface segment (4) surrounds the first inner segment (7), and that the first friction surface segment (4) is rotationally driven independently of the first inner segment (7).
Type:
Application
Filed:
June 27, 2006
Publication date:
December 28, 2006
Applicant:
GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH
Inventors:
Rudolph Zettler, Shahram Sheikhi, Mathias Beyer, Jorge dos Santos, Arne Roos, Henry Loitz
Abstract: In a method for the treatment of metallic materials especially for the consolidation of the texture of the materials, a blank of the metallic material is heated to a transformation temperature and the blank is then subjected to twisting preferably while, at the same time, being compressed. In this way, the texture can be refined to a large degree in a simple and inexpensive manner.
Type:
Grant
Filed:
December 11, 2001
Date of Patent:
October 3, 2006
Assignee:
Gkss-Forschungszentrum Geesthacht GmbH
Inventors:
Fritz Appel, Stephen Eggert, Uwe Lorenz, Michael Oehring
Abstract: In an apparatus and a method for the analysis of atomic or molecular elements contained in a sample by wavelength dispersive X-ray spectrometry, wherein primary x ray or electron radiation is directed onto the sample whereby fluorescence radiation is emitted from the sample, the fluorescence radiation is directed onto a mirror or focussing device consisting of a multi-layer structure including pairs of layers of which one layer of a pair comprises carbon or scandium and the other comprises a metal oxide or a metal nitride and the fluorescence radiation is reflected from the mirror or focussing device onto an analysis detector for the analysis of the atomic or molecular elements contained in the sample.
Abstract: A proton-conductive membrane for electrochemical applications, particularly for use in fuel cells, is provided. The membrane consists of a polymer based on a base polymer, other than a vinyl polymer, which includes aromatic rings and also sulfonic acid groups which are bound covalently directly to the aromatic rings of the base polymer, that is, without spacer groups therebetween.
Type:
Grant
Filed:
November 23, 2002
Date of Patent:
September 5, 2006
Assignee:
GKSS-Forschungszentrum Geesthacht
Inventors:
Kai Jakoby, Suzana Nunes Pereira, Klaus-Victor Peinemann
Abstract: The invention proposes a process for producing components (10) or semi-finished products which contain intermetallic titanium aluminide alloys, which includes the following process steps: rough contouring of a plurality of plate-like bodies (11) so as to correspond to a desired final shape of the component (10) or semi-finished product, some of these plate-like bodies or all the plate-like bodies consisting of titanium aluminide alloys; carrying out surface-to-surface joins between the plurality of plate-like bodies (11) stacked on top of one another so as to form an overall body (10); and forming the desired final shape of the overall body (10). The invention also concerns a component, in particular for jet engines, which is produced using this process.
Type:
Application
Filed:
February 24, 2005
Publication date:
June 29, 2006
Applicant:
GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH
Inventors:
Michael Oehring, Jonathan Paul, Fritz Appel
Abstract: The invention relates to a polymer substrate for cultivating tissue cells. The substrate is provided in form of an oxygen-permeable flat membrane, preferably with ultra-filtration properties, and has an optimized amine content of at least 10 nmole amine function per cm2 membrane. The substrate can be used to treat burns and other tissue defects. The substrate can be rapidly populated with cells, in particular with keratinozytes, and supports reorientation of the cells after the populated membrane is transferred to a wound or a dermis equivalent. The substrate can also be later easily detached from the newly formed tissue structure.
Type:
Application
Filed:
October 6, 2005
Publication date:
April 20, 2006
Applicant:
GKSS-Forschungszentrum Geesthacht GmbH
Inventors:
Gregor Boese, Wolfgang Albrecht, Guenther Malsch, Thomas Groth, Andreas Lendlein, Hans-Jurgen Stark, Norbert Fusenig
Abstract: The invention relates to a novel polymer composition comprising at least one copolymer constituted of acrylic (AC) monomer units and of at least one water-soluble comonomer unit, which is preferably 2-acrylamido-2-methyl-propane sulfonic acid (AMPS). The composition is used to produce materials, such as membranes, film or suface coatings, that arc suitable as highly tissue compatible supports for epithelial cells, such as hepatocytes. The materials are suitable to be used in a bioartificial liver, where they work as separating membrane and carrier for adhesion-dependent tissue cells. As an example it is described how selectively permeable membranes are formed by a phase inversion process from these acrylic copolymers with varying content of 2-aclylanido-2-methylpropane sulfonic acid (AMPS) and how they interact with liver cells to construct a biohybrid organ for liver replacement.
Abstract: An apparatus is proposed for connection of workpieces using the friction stir welding method, with a shaft (33, 33?) which can be driven such that it rotates and at whose end remote from the drive end of the shaft a pin-like projection (8) is arranged, at whose end a first stop, which is formed by a first shoulder (6), is arranged, with the first shoulder having a diameter which is larger than the diameter of the pin-like projection (8), and with a second stop (7, 7?), which is formed from a second shoulder and is arranged such that the workpieces (19) to be connected can be enclosed between the stops (6, 7, 7?), in that at least one of the stops can be moved translationally in order to enclose the workpieces (19) with a predetermined force in the direction of the other stop.
Type:
Application
Filed:
June 15, 2005
Publication date:
January 12, 2006
Applicant:
GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH
Inventors:
Henry Loitz, Jens Wulfsberg, Jens von der Wense, Alexander von Strombeck, Christoph Schilling, Jorge dos Santos
Abstract: A mirror element for the reflection of x-rays, particularly for EUVL exposure systems for the manufacture of semiconductor structures, wherein the x-rays reach the mirrors under a certain incident angle, consists of a substrate with a multilayer structure disposed thereon which multilayer structure comprises at least a first layer of a lanthanum-containing compound and a second layer of a boron-containing compound alternately disposed on the substrate.
Abstract: An ion conductive membrane for electrochemical applications is provided for forming the membrane on the basis of a polyimide or copolyimide polymer, which contains in its structure heterocyclic groups, particularly in the form of imidazole-, pyridin or pyrimidin groups. The electrochemical applications include particularly the use of such membranes in fuel cells.
Type:
Grant
Filed:
November 23, 2002
Date of Patent:
March 22, 2005
Assignee:
GKSS-Forschungszentrum Geesthacht, GmbH
Inventors:
Yolanda Alvarez-Gallego, Suzana Pereira Nunes, Kai Jakoby, Javier de Abajo
Abstract: In a device for butt joining workpieces by friction stir welding along a connecting area, including a shaft having a driven end and, at the opposite end, a pin-like projection to be disposed in the connecting area of the workpieces, whereby, upon rotation of the shaft, the workpiece material in contact with the pin-like projection is plasticized, first and second stops with first and second shoulders are provided on the device and disposed at opposite sides of the workpieces and at least one of the stops is movable relative to the other and biased toward the other with a controllable force for engaging the workpieces between the shoulders of the stops during the friction stir welding procedure.
Abstract: In a method of determining hydrographic parameters describing a sea swell field from analog signal sequences supplied by radar devices, wherein a sequence of digitized signal in spatial coordinates is generated from the analog signal sequences and, by Fourier transformation, a three-dimensional complex value frequency wave number spectrum is determined therefrom, which is filtered on the basis of the dispersion relation principle that inter-links the wave numbers and the frequencies of the sea swell for a localization of the sea swell-specific parameters by separating the signals from the noise and determining the signal to noise ratio and from the ratio the height of the waves and, by localizing the signal coordinates in the surface area defined by the dispersion relationship, parameters describing the surface currents of the sea swell field in a three-dimensional spectral space and the water depth, from the phase information concerning the waves monitored in the sea swell field the parameters of the sea swe
Type:
Grant
Filed:
January 21, 2003
Date of Patent:
August 10, 2004
Assignee:
GKSS-Forschungszentrum Geesthacht GmbH
Inventors:
Jörg Seemann, Christian M. Senet, Friedwart Ziemer
Abstract: In a metalliferous storage material for hydrogen a metal oxide is provided in or on the surface of the metalliferous materialas a catalyst for the hydrogenation or dehydrogenation of the metalliferous storage material.
Type:
Grant
Filed:
September 25, 2001
Date of Patent:
June 22, 2004
Assignee:
GKSS-Forschungszentrum Geesthacht GmbH
Inventors:
Thomas Klassen, Rüdiger Bormann, Wolfgang Oelerich, Volker Güther, Andreas Otto
Abstract: In a method and apparatus for joining at least two adjoining workpieces by friction welding, a rotatable shaft is provided at its front end with a friction welding tool which is biased toward the workpieces to plasticize an area of the workpiece into which the tool enters while the plasticized material is displaced and stored in, or around, the tool. Upon passing through the top workpiece and entering the lowermost work piece, the tool is removed and the stored plasticized material is returned to the void provided by the tool upon removal thereof from the workpieces for joining the workpieces.
Abstract: In a device and a method for the analysis of atomic and molecular elements by way of wavelength dispersive x-ray spectrometric structures including at least one mirror or focussing device having a multi-layer structure onto which fluorescent radiation generated by primary x-ray or electrons beams from a sample to be examined is directed and the reflected fluorescence radiation is supplied to a measuring device for determining the nature of impurities contained in the sample, the multi-layer structure consists of at least a lanthanum layer and a boron carbide layer.
Abstract: In a device for joining, by friction stir welding, at least two workpieces, a support structure is provided with a head portion which includes drive means and a shaft which is rotatable by the drive means and has a pin-like projection projecting toward a support member of the support structure for supporting workpieces to be joined by friction stir welding and wherein guide means are provided for moving the rotating pin-like projection into contact with, and into, the workpieces while plasticizing the workpieces in the contact area to form thereby a spot weld by friction stir welding.