Patents Assigned to Rosenthal Technik AG
  • Patent number: 4531908
    Abstract: A ceramic burner head in which the burner mouth is formed from a unitary porous ceramic body with parallel slits defining fuel-permeable walls between and which is bonded to upper, lower and lateral ceramic plates forming the burner body. The ceramic piece is bonded to the plates in a gas-tight manner.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: July 30, 1985
    Assignees: Kernforschungsanlage Julich GmbH, Rosenthal Technik AG
    Inventors: Siegfried Forster, Stefan R. Schindler, Hartmut Keller
  • Patent number: 4481056
    Abstract: A process for continuous production of shaped bodies of synthetic resin reinforced with axially parallel fibers wherein a plurality of continuous fibers are drawn through spaced apertures in a perforated guide plate and then through an alternating series of impregnating baths and shaping nozzles and finally through a hardening zone. The impregnating baths, shaping nozzles, and drying zone are disposed in a vertical arrangement, the shaped body withdrawn from one shaping nozzle is passed with a further group of fibers through the next resin impregnating bath and shaping nozzle, the impregnating resin on the surface of the shaped body is still liquid as it enters the next impregnating bath and all of the impregnating baths and the drying zone are maintained at the same temperature. The resulting fiber-reinforced shaped synthetic resin bodies are particularly suitable as electrical insulators which also exhibit good mechanical strength and which are especially useful in high voltage installations.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: November 6, 1984
    Assignee: Rosenthal Technik AG
    Inventor: Martin Kuhl
  • Patent number: 4440113
    Abstract: Ceramic components of a burner-heat exchanger or like types, in which two fluids are passed in indirect heat exchange along opposite sides of ceramic walls through respective passages in a ceramic body defining these walls and passages, are interconnected by extending the outer plates within which the ceramic body is enclosed at each end of each pair of components to be joined so that the extensions can be connected together, e.g. with a sleeve and between the ceramic bodies, chambers can be formed.
    Type: Grant
    Filed: December 22, 1981
    Date of Patent: April 3, 1984
    Assignees: Kernforschungsanlage Julich GmbH, Rosenthal Technik AG
    Inventors: Siegfried Forster, Stefan R. Schindler, Hans-Jurgen Pohlmann
  • Patent number: 4384751
    Abstract: A shelving unit comprises a pair of ladder-like members each formed from two vertical elements connected by a plurality of horizontal elements. Several interchangeable generally rectangular shelves rest upon respective opposed pairs of the horizontal elements. Each of the shelves presents a recessed area along three of its edges which receives an adjacent edge of a U-shaped wall element. At least one, and preferably the front two, of the vertical elements provides a lighting tube for allowing illumination of displayed goods. The shelves can be rearranged without altering the electrical installation for the lighting tube. A series of the shelving units can be formed as a display cabinet, which can itself be formed as an enclosure to which access is gained through a covered entrance way constituting an information region.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: May 24, 1983
    Assignee: Rosenthal Technik AG
    Inventors: Rita Guntermann, Hermann Siekmann
  • Patent number: 4332913
    Abstract: Disclosed is an alumina porcelain composition, suitable for use after firing to form electric insulators, comprising from about 40 to 65% by weight of calcined alumina, from about 15 to 40% by weight of plastic kaolinite-montmorillonite constituents, and from about 20 to 26% by weight of a flux combination which contains alkali-aluminum silicates and from about 0.1 to 5% by weight of one or more alkaline earth oxides, preferably in the form of alkaline earth compounds. The flux combination preferably comprises about 22 to 24% by weight of potassium-aluminum silicates and from about 0.2 to 2.5% by weight of barium oxide in the form of barium compounds, thus avoiding the disadvantages associated with the use of TiO.sub.2 and MnO.sub.2.
    Type: Grant
    Filed: July 30, 1980
    Date of Patent: June 1, 1982
    Assignee: Rosenthal Technik AG
    Inventor: Peter Bock
  • Patent number: 4321964
    Abstract: The invention relates to a recuperative heat exchanger comprising an elongate rotationally symmetric body of ceramic material having radially outwardly extending, flow channels of slot like cross-section extending along the axis of the body. Alternate flow channels extend further toward the surface of the body and further toward the axis of the body, respectively. Inlet and outlet openings are provided for the flow channels about at the ends of the body. The invention also comprises a process for making such a heat exchanger, including extruding ceramic material through an extrusion nozzle with a free cross-section in which core bodies are shaped and positioned for generating the flow channels and inner and outer cover walls defining the flow channels. The invention further comprises the extrusion nozzle in which the process is performed.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: March 30, 1982
    Assignee: Kernforschungsanlage Julich Gesellschaft mit Berschrankter Haftung, Rosenthal Technik AG
    Inventors: Siegfried Forster, Axel Krauth, Horst R. Maier, Hans J. Pohlmann
  • Patent number: 4298059
    Abstract: Disclosed is a recuperative heat exchanger, comprising a body of ceramic material having a plurality of generally parallel flow channels arranged adjacently to one another generally axially with respect to the body, with adjacent flow channels having a common partition wall. The plurality of flow channels include a plurality of first flow channels for carrying a first heat transfer medium and a plurality of second flow channels, alternatingly arranged with respect to the first flow channels, for carrying a second heat exchange medium. Each of the first channels has an inlet positioned on one lateral side of the body near a first longitudinal end of the body and an outlet positioned in the opposite, second longitudinal end of the body, and each of the second flow channels has an inlet positioned on one lateral side of the body near the second longitudinal end of the body and an outlet in the first longitudinal end of the body.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: November 3, 1981
    Assignees: Rosenthal Technik AG, Kernforschungsanlage Juelich GmbH
    Inventors: Axel Krauth, Horst R. Maier, Hans-Juergen Phlmann, Siegfried Foerster, Manfred Kleeman
  • Patent number: 4277539
    Abstract: Refractory products such as foundry articles and composite metal-ceramic articles are prepared from a sepiolite (2 MgO.3SiO.sub.2.2H.sub.2 O) and silicate containing aluminum titanate.
    Type: Grant
    Filed: May 2, 1980
    Date of Patent: July 7, 1981
    Assignee: Rosenthal Technik AG
    Inventors: Hartmut Keller, Axel Krauth, Horst R. Maier, Horst Nink, Hans J. Pohlmann, Horst Reddig, Johann Siebels
  • Patent number: 4268919
    Abstract: A joint endoprosthesis including a pivot body with a radially extending hole; a pin press fit in the hole; a recess extending into the pin from its end in the hole; wedging means for spreading the pin from its end in the hole; wedging means for spreading the pin end in the hole in the body to securely hold the pin.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: May 26, 1981
    Assignee: Rosenthal Technik AG
    Inventor: Anton Zeibig
  • Patent number: 4265302
    Abstract: A heat exchanger of a ceramic body, or the like, having a plurality of elongate flow passages in parallel relationship with the placement of the passages staggered with respect to the opposite end cover walls of the ceramic body, transversely extending parts of both cover walls being absent to expose those staggered passages that pass closer to the respective cover wall, thereby to permit access for fluid media to the flow passages; particular characteristic features of the passages are disclosed.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: May 5, 1981
    Assignees: Rosenthal Technik AG, Kernforschungsanlage Julich GmbH
    Inventors: Siegfried Forster, Manfred Kleemann, Axel Krauth, Horst R. Maier, Hans-Jurgen Pohlmann
  • Patent number: 4246696
    Abstract: Open-air compound insulators are made treating a prefabricated glass-filter rod with silane, extruding a rubber layer on the rod, strengthening the rubber layer and bonding prefabricated screens to the rubber layer by vulcanization.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: January 27, 1981
    Assignee: Rosenthal Technik AG
    Inventors: Ewald Bauer, Martin Kuhl
  • Patent number: 4225981
    Abstract: In a bone joint endoprosthesis, the spigot of the metal shank is externally threaded to mate with a thread inside the ceramic head of the prosthesis; the thread on the spigot has greater depth in the radial direction, with flat sides, and the depth of the thread in the head is more shallow.
    Type: Grant
    Filed: August 22, 1978
    Date of Patent: October 7, 1980
    Assignee: Rosenthal Technik AG
    Inventor: Anton Zeibig
  • Patent number: 4217466
    Abstract: An elongated electrical insulator has a supporting rod and barriers or screens spaced along the rod; an intermediate layer of material between the rod and the barriers or screens serves to exclude atmospheric moisture and other materials enhancing the electrical insulating characteristics of the insulator. The rod comprises a non-saponifiable resin reinforced with fiber glass of low alkali content. The barriers or screens comprise a non-saponifiable moisture-repellent polymer containing a filler. The intermediate layer comprises a moisture-repellent non-saponifiable polymer.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: August 12, 1980
    Assignee: Rosenthal Technik AG
    Inventor: Martin Kuhl
  • Patent number: 4198711
    Abstract: A joint endoprosthesis including a pivot body with a radially extending hole; a pin press fit in the hole; a recess extending into the pin from its end in the hole; wedging means for spreading the pin from its end in the hole; wedging means for spreading the pin end in the hole in the body to securely hold the pin.
    Type: Grant
    Filed: June 21, 1977
    Date of Patent: April 22, 1980
    Assignee: Rosenthal Technik AG
    Inventor: Anton Zeibig
  • Patent number: 4170794
    Abstract: A bone joint endoprosthesis comprises a spherical body of the joint with hole in it for receiving a shaft spigot; a shaft is embedded in bone; the shaft has a spigot which is received in the hole; a spreader, comprised of a material that swells when it is wetted, is wrapped over the spigot in the hole or is inside the spigot and the spreader expands radially in the hole or inside the spigot to secure the joint; shaping and profiling of the spigot and the wall of the hole for effective retention of the spreader are disclosed.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: October 16, 1979
    Assignee: Rosenthal Technik AG
    Inventors: Anton Zeibig, John T. Scales
  • Patent number: 4127741
    Abstract: For fixing metal sheaths on glass fiber reinforced plastic rods, which rods are used, for example, in composite insulators: the sheath is in a number of sections in a longitudinal array; there is an abutment inside the sheath at each sheath section, there is a shoulder piece on the outside of the rod inside each sheath section; the abutment in a sheath section is at one longitudinal side of the respective shoulder piece in that sheath section; elastic and compliant buffer means, such as springs, or the like, are placed between the abutment and its shoulder piece; the compliance of the buffer means increases toward one end of the arrangement to compensate for the different rates of expansion of the sheath and the rod; other embodiments all have appropriate buffer means in each sheath section, which buffer means increase in compliance moving toward the end of the sheath through which the rod exits.
    Type: Grant
    Filed: March 31, 1977
    Date of Patent: November 28, 1978
    Assignee: Rosenthal Technik AG
    Inventors: Ewald Bauer, Martin Kreuzer
  • Patent number: 4005495
    Abstract: Endoprosthesis for bone joint, or the like, in the form of a spherical cap having a frusto-conical opening into it; the end of the bone is shaped to matingly fit into the opening into the cap; a thrust plate passes through the bone into the cap opening to transfer thrust away from the end of the bone; grooves in the cap to promote adhesion to the bone.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: February 1, 1977
    Assignee: Rosenthal Technik AG
    Inventors: Helmut Locke, Martin Salzer
  • Patent number: 4001491
    Abstract: Composite insulator having a plurality of umbrella-shaped sections on a trunk; each section is comprised of a mould filled with a hardenable material which adheres to the mould and the trunk; shaping the mould to receive the hardenable material.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: January 4, 1977
    Assignee: Rosenthal Technik AG
    Inventor: Ewald Bauer
  • Patent number: 3979779
    Abstract: A ceramic implant having at least one component for permanently connecting resected live bone stumps without the use of bone cement or the insertion of an endoprostheses portion into the intramedullar or marrow space of the bone, the implant including at least one cylindrical sleeve having a truncated conical interior recess with rounded grooves helically formed therein for closely engaging a cooperatively formed live bond stump. The ceramic sleeve may be held to the bone stump by use of surgical screws or by a sleeve clamp, to provide a high degree of strength to the resected bone end, as compared to the natural bone strength, immediately after the implanatation operation and to reduce the cortical periphery encased by the implant to promote maximum natural bone growth with minimal inflammation and damage to the marrow space.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: September 14, 1976
    Assignee: Rosenthal Technik AG
    Inventors: Anton Zeibig, Helmut Locke