Patents Assigned to Deutsche Forschungs- und Versuchsanstalt fur Luft
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Patent number: 4691695Abstract: In an apparatus for medical treatments, examinations or tests comprising a hamber connectible to a vacuum source and having at its one end side a passage aperture with a flexible sealing member, the chamber is formed of a foldable bellow provided with a support structure adapted to be dismantled. In axial direction of the bellow, the support structure contains a plurality of substantially parallel-mounted peripheral members backing up peripherally the bellow and being mobile relative to each other, as well as mobile longitudinal stiffening elements secured to the peripheral members.Type: GrantFiled: October 4, 1985Date of Patent: September 8, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfart e.V.Inventors: Josef Birk, Friedhelm Baisch, Heinz J. Borger
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Patent number: 4688421Abstract: A rear support balance is utilized for measurement of the six components of he flight mechanics axis system for models mounted in wind tunnels. The balance has a balance body that is inserted between the model and the mounting. The balance body has an action beam 2 and a reaction beam 3 between which piezoelectric measurement pickups are arranged the respective emitted electric charge of which is a measure of the respective component.Type: GrantFiled: October 7, 1985Date of Patent: August 25, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft-und Raumfahrt e.V.Inventor: Hartmut Pzsolla
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Patent number: 4677568Abstract: There is provided a process and system for the memory-saving programming of he motional actions of a robot wherein a reference course is recorded first in the form of samples, which are then stored. For reducing the storage space, the recorded and stored samples are transformed into a Fourier matrix .sub.0 C by means of a Fourier analysis. Said matrix is then filed in a memory. From this Fourier matrix .sub.0 C, it is possible to derive Fourier matrices for courses with the same configuration, but with any desired position and orientation solely by a linear transformation of the coordinates in the form of a Fourier matrix .sub.1 C. With the help of the dynamical model of the robot used, the derived Fourier matrix .sub.1 C can be modified with adjustment to the desired speed, so as to compensate for the dynamical errors in the motional actions of the robot.Type: GrantFiled: May 8, 1985Date of Patent: June 30, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventor: Klaus Arbter
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Patent number: 4675805Abstract: PID characteristics of a closed-loop type controller compensation network for a hydraulic pulsing machine coupled with a test specimen are adjusted by determining the closed-loop stability locus of the network and adjusting PID characteristics until the stability locus is located at a desired position.Type: GrantFiled: August 21, 1984Date of Patent: June 23, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft-und Raumfahrt e.V.Inventor: Raymond Freymann
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Patent number: 4657391Abstract: A ring laser particularly for a ring laser type of gyro in which the ring ser includes three corner mirrors and a separate gas discharge tube arranged in a recess in a block. The gas discharge tube is mounted on the block longitudinally of the beam path by at least one piezo electric drive. The modulation amplitude of the separated beam portion is measured by a control circuit and is converted into a high voltage adjustment signal for the drive as a function of the modulation amplitude. Two drives may be spaced apart in the longitudinal direction of the gas discharge tube and these can be controlled independently of each other. Although the beam path may be displaced as a result of thermal expansion and/or bending of the block, the gas discharge tube may be kept exactly coaxial with the beam which traverses it.Type: GrantFiled: March 29, 1985Date of Patent: April 14, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Rudiger K. Rodloff, Werner W. Jungbluth
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Patent number: 4655392Abstract: A steam-generator control method is proposed for controlling the mass flows f an oxidant and a fuel which are supplied for combustion. In order to control the flows at stoichiometric ratios with a required accuracy, the controlled variables are established by the measurements of the mass flows and their comparison with theoretically predetermined stoichiometric ratios. Measurement errors are defined continuously through a combustion-gas analysis, conducted by means of a probe after the combustion. The errors are used for the correction of the controlled variables. The time constant of the correction is smaller than the time constant of dynamic changes of the errors.Type: GrantFiled: June 28, 1985Date of Patent: April 7, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventor: Karlheinz Wolfmuller
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Patent number: 4652130Abstract: In the inventive interferometers, based on the principle of Michelson, an teration of pathlength is obtained through rotation of a movable mirror, where this mirror is a retroreflector; or an eccentricaly rotating retroreflector laterally deviates a non centric, impinging beam more or less, depending on the angular position of the retroreflector and directs said beam through a fixed wedge of refractive material, whose index of refraction is different from the index of refraction of air. Hence with the inventive interferometers no mechanical back and forth movement of a mirror or wedge is performed. Interferometers of this kind can be used for spectroscopy in a wide region of the electromagnetic spectrum; examples are the spectral analysis in chemistry or the astronomy (for instance in the infrared region).Type: GrantFiled: December 20, 1984Date of Patent: March 24, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventor: Volker Tank
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Patent number: 4652884Abstract: A system and method for nagivating using satellites for transmitting coded ime signals as well as additional data for the purpose of determining position, locating operations, navigation, etc., which includes, transmitting only a time signal consisting of an identification code from a plurality of orbiting navigational satellites directly to users, and distributing any data required for determining position, locating operations and navigation as well as any data on orbiting satellites and ground stations by transmission from a small number of synchronous satellites positioned in geosynchronous orbit, to users. Data from the synchronous satellites may be transmitted to users, together with a time signal, at precisely the same frequency at which the navigational satellites emit their time signals.Type: GrantFiled: July 15, 1985Date of Patent: March 24, 1987Assignee: Deutsche Forschungs-und Versuchsanstalt fur Luft-und Raumfahrt e.V.Inventor: Siegfried Starker
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Patent number: 4641799Abstract: An arrangement for controlling the air flow past an aerodynamic profile, (such as an aerofoil surface of a wing, tail plane, or fuselage of an aircraft or missile, a propeller, helicopter rotor, or blading of a turbo-engine fan or wind impeller) by providing a number of orifices of small diameter spaced apart in the profile surface in the longitudinal direction of the profile transversely to the direction of air flow over the profile and to the chordwise direction of the profile. Fluid is either discharged or drawn in through the orifices perpendicularly to the air flow in the region of separation of laminar flow. The orifices have a coefficient of flow (i.e., either a discharge or an intake coefficient) C.sub.Q =(V/FV) of up to 10.sup.-4 for a Reynolds Number less than 3.times.10.sup.6, where v=volume flow of the fluid through the discharge orifices, F=profile area and V=velocity of the air stream flowing over the wing or blade.Type: GrantFiled: August 21, 1985Date of Patent: February 10, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Armin W. Quast, Karl H. Horstmann
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Patent number: 4639630Abstract: A piezoceramic servo-drive for producing translational and angular moveme especially for application to ring laser mirrors, and including piezo discs arranged in a column. The discs are polarised in such a way that the direction of extension of the column and the direction of the electrical field lie in parallel. The discs are provided on one side with a complete contact surface and on the other side are divided into electrically separate contact segments which are provided with separate electrical connections.Type: GrantFiled: March 26, 1985Date of Patent: January 27, 1987Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Rudiger K. Rodloff, Werner W. Jungbluth
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Patent number: 4638632Abstract: An exhaust pipe outlet is surrounded by a jacket part having an inlet of ger diameter, permitting air to be drawn into the jacket part to isolate it from contact with the hot exhaust gases. Blocking air may be injected at the downstream end of the jacket part.Type: GrantFiled: February 27, 1985Date of Patent: January 27, 1987Assignee: Deutsche Forschungs-und Versuchsanstalt fur Luft-und Raumfahrt e.V.Inventors: Rudolf Wulf, Wolfgang Stager
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Patent number: 4635198Abstract: Sound heads (SK1 to SK3) are fixed, distributed peripherally, on the part of the body, e.g. an arm or leg. Each of the sound heads is able to transmit ultrasonic signals along a measuring section (MS1 to MS3) leading to another sound head, which signals are received by the other sound head. The sound heads can consist of angularly arranged sound members (14). In this way, all three sides of a polygon formed by the sound heads are measured, from which measurements the surface area of the polygon can be determined.Type: GrantFiled: August 9, 1984Date of Patent: January 6, 1987Assignee: Deutsche Forschungs-und Versuchsanstalt fur Luft-und Raum-fahrt e.V.Inventors: Hans Hohlweck, Gernold Plath, Friedhelm Baisch
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Patent number: 4631398Abstract: Apparatus for receiving electromagnetic radiation at various angles of incidence including an optical element for guiding the radiation upon a radiation detector, and magnetic drive means for adjusting the position of the optical element, characterized by the provision of a shock-resistant suspension for the magnet in the form of a plurality of linear elements in the form of coplanar taut wires or resilient bands that extend radially outwardly from and coplanar with the magnet, together with a plurality of stationary coils arranged circumferentially about the magnet, whereby the magnet can be pivoted about pivot axes, respectively, contained in the plane, and also be displaced in a direction normal to the plane (i.e., in the Z-direction).Type: GrantFiled: September 17, 1985Date of Patent: December 23, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventor: Lothar Liebing
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Patent number: 4631096Abstract: A new high energy chemical complex is provided formed from metastable hel fixed on ammonia (HE.sub.m NH.sub.3), so that the metastable helium electron is captured so as to be held in the "L" layer of the metastable helium atom.The process for producing the He.sub.m NH.sub.3 complex comprises the following steps: excitation of helium to create metastable helium; deposition of metastable helium on NH.sub.3 to form the complex; and accumulation or condensation of the product.The invention finds a particular application as a propellant in the aerospace field.Type: GrantFiled: October 1, 1984Date of Patent: December 23, 1986Assignee: Deutsche Forschungs-und Versuchsanstalt fur Luft-und Raumfahrt E.V.Inventors: Georg Sanger, Gerrit Hietkamp, Walter Peschka
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Patent number: 4630523Abstract: Electrohydraulic regulating device, particularly for aircraft controls, iuding a regulating cylinder having a regulating piston therein capable of being loaded at either end thereof for the positioning of which necessary volumes of operating fluid can be supplied separately to either end space of the cylinder by means of magnetically-operable valves; a computer by which switch pulses of variable duration to be fed to the magnetically-operable valves are determined in dependence on the specified adjustment distance of the regulating piston; restrictors which determine the throughput of operating fluid through the magnetically-operable valves and sensors which after the switching of a respective magnetically-operable valve generate electrical signals which are fed back to the computer purely as a confirmation of operation. The restrictors are so arranged in an operating fluid circuit that, on movement of the piston, operating fluid flows through only one of the restrictors.Type: GrantFiled: February 27, 1985Date of Patent: December 23, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventor: Johannes Tersteegen
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Patent number: 4629414Abstract: The invention relates to a hot-gas generating burner comprising a nozzle charging a fuel jet which then enters a mixing tube, and an orifice plate surrounding the outlet of the nozzle. The casing of the burner is divided by the orifice plate into an upstream-disposed precombustion chamber which includes the nozzle, and a downstream combustion chamber which contains the mixing tube. The orifice has a central passage for the fuel jet which is discharged from the nozzle and a number of openings surrounding the passage. In order to reduce the noise concomitant with the operation of the burner, the spacing between the peripheries of the neighboring openings equals at least 50% of the diameter of the openings, and/or the openings in the orifice plate are associated with at least one air duct in the direction of flow.Type: GrantFiled: August 8, 1985Date of Patent: December 16, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Winfried Buschulte, Erich Adis, Manfred Bader
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Patent number: 4628515Abstract: A ring laser, especially for a ring laser type of gyro, comprising a block roduced from a thermally and mechanically highly-stable ceramic glass and three corner mirrors. At least one of the mirrors can be tilted about an axis by a servo-drive and one of the mirrors is a semi-transparent separating mirror, behind which is arranged a photo-detector in the beam path of the separated beam portion of one of the rotating wave trains. The photo-detector may at least be one photo-diode which is arranged in such a way that it gives an output signal proportional to the position of the beam, as a function of which an adjustment signal is formed for the servo-drive of the tiltable mirror. Two photo-diodes can be provided alongside or on top of each other in the plane of the beam. The photo-diodes are in the form of a differential photo-diode. In order to eliminate errors, one of the corner mirrors is tiltable about an axis perpendicular to the plane of the beam path.Type: GrantFiled: March 26, 1985Date of Patent: December 9, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Rudiger K. Rodloff, Werner W. Jungbluth
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Patent number: 4624874Abstract: A removable core for use in the production of tubular structures from fibre einforced resin materials. The body of the core is composed of a foam material which softens or collapses under the action of heat sufficient to cure the resin material but is hard and cross-sectionally dimensionally stable under less heat than that. The core is provided on the outside with a heat shrunk plastic tube or hose which closely embraces the foam body and serves as a coating therefor, thereby enhancing the rigidity and stability of shape of the core and imparting thereto a smooth surface.Type: GrantFiled: July 24, 1985Date of Patent: November 25, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e. V.Inventor: Rainer Schutze
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Patent number: 4610623Abstract: A gas burner capable of heating a gas to a high temperature and pressure is isclosed. The burner utilizes a mixing canal to mix the fuel and oxidiser gases and a conically enlarging recess at the exit of the mixing canal. In the recess are both several intake openings for the gas to be heated which openings extend from feeder canals that are parallel to the mixing canal and a side canal leading to an ignition mechanism. The intake openings provide a gas-dynamic blockage of the fuel and oxidiser gas mixture.Type: GrantFiled: February 25, 1985Date of Patent: September 9, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventor: Heinrich Lambrecht
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Patent number: 4608830Abstract: In order to achieve efficient refueling with a method and an apparatus for the automatic refilling of a liquid hydrogen tank in a motor vehicle in which the tank is connected to a liquid hydrogen supply line as well as a hydrogen gas return line, it is proposed that prior to commencement of refilling the liquid hydrogen tank the liquid hydrogen supply line in the vehicle be connected to the hydrogen gas return line and that liquid hydrogen be passed through said lines in order to cool them whereby only after they have been cooled is the liquid hydrogen supply line connected to the liquid hydrogen tank. For this purpose, a bypass line connecting the liquid hydrogen supply line to the hydrogen gas return line is provided in the motor vehicle, and electrically operable closing valves are provided in the liquid hydrogen supply line downstream of where the bypass line branches as well as in the bypass line.Type: GrantFiled: November 29, 1984Date of Patent: September 2, 1986Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.Inventors: Walter Peschka, Gottfried Schneider, Willi Nieratschker