Block Laying Patents (Class 404/99)
  • Publication number: 20140308076
    Abstract: Disclosed may be an intermediate surface for supporting a small paver, wherein the surface can also be used to exchange heat with the pavers. In one embodiment, the apparatus may be a hextray defined by a frame with a hexagonal lattice for supporting pavers. The hextray preferably features a tubing track throughout the lattice to accommodate heat exchange tubing. In operation the hextray may be positioned above a pedestal or directly on a subsurface. In embodiment, the hex tray may be outfitted with insulation and a metal plate so that heat may be exchanged with pedestals via fluid passing through tubing installed throughout the hexagonal lattice. In a preferred embodiment, the hextray features a slot in its corners for receiving a locking disk or locking slider.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 16, 2014
    Inventor: Ramin Tabibnia
  • Patent number: 8747021
    Abstract: A transport apparatus for the engagement, orientation and installation of a unit of paving blocks is comprised of a support frame having a pair of spaced-apart aligned pivot connections. Support arms are pivotally connected to each pivot connection under the support frame. Two or more spaced-apart parallel block engaging arms are displaceably secured by connecting posts to the pair or parallel support arms. A piston simultaneously displaces the parallel support arms and the block engaging arms. The block engaging arms each have two or more suction cups for releasable securement to a top face of respective ones of paving blocks in the unit of paving blocks. When the piston rod of the piston is at a first position all of the suction cups are aligned on transverse parallel axis and when at a predetermined second position they are disposed in alignment on parallel angulated axis. The method of installation is also described.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: June 10, 2014
    Assignee: Techo-Bloc Inc.
    Inventor: Jean-Michel Brassard
  • Patent number: 8591143
    Abstract: A slab jack assembly for raising a fragmented slab from between sections of a concrete slab from which the fragmented slab is cut comprises a planar support positionable on top of the fragmented slab. Jacks are mounted on opposite sides of the planar support to engage an upper surface of the concrete slab. Securement pins mounted on the planar support are insertable into holes bored in the plurality of fragments in the fragmented slab and expandable within the holes to secure the fragments to the planar support. The first and second jacks are then operable to lift the planar support and fragments upward relative to the concrete slab.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: November 26, 2013
    Inventor: Ronald A. Knapp
  • Patent number: 8528153
    Abstract: The present invention is a novel tool which enables a mason or concrete worker to form very beautiful decorative designs into the edge of poured concrete or central surface area of the poured concrete which is used for a driveway, walkway, border of a planter, or other concrete structure having at least a partially flat surface and at least one side edge where the decorative design is formed. Through use of the present invention, any one of a multiplicity of multi-arcuate designs are formed into at least one side edge or outside edge or inside edge or central location of a poured concrete slab to thereby significant beautify a driveway, walkway, planter border, or any other poured concrete structure.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: September 10, 2013
    Inventor: Gerald V. Hogan
  • Publication number: 20120183349
    Abstract: A paving apparatus is arranged to pave a supporting surface by casting individual paving stones on site on a mobile frame and placing the cast paving stones directly onto the supporting surface in an uncured state adjacent previously placed paving stones as the apparatus is displaced along the supporting surface. Molds are supported by a conveying mechanism of the paving apparatus for movement between a casting position in alignment with a hopper dispensing castable material into the molds and a placing position in which the uncured paving stones are dispensed from the mold directly onto the supporting surface to be paved.
    Type: Application
    Filed: November 7, 2011
    Publication date: July 19, 2012
    Inventor: Radovan Kropacek
  • Publication number: 20120121328
    Abstract: The paver installation system includes a grid having a plurality of mounting holes for selective installation of spacers, a flexible edging and a screed guide rail. The screed guide rail may be selectively installed on the grid via mounting pegs mounted in select mounting holes for screeding an intermediate layer of aggregate material between the grid and the pavers to be laid thereon. The flexible edging is attached to the grid in order to set the edges of the pavement to be laid, and the flexibility thereof easily accommodates curved edges by bending to conform to the curves. The spacers are laid onto user selected mounting holes in the grid in order to serve as guides for laying pavers in a desired pavement pattern and to maintain spacing between adjacent pavers.
    Type: Application
    Filed: November 11, 2010
    Publication date: May 17, 2012
    Inventor: CHARLES R. WHITE
  • Publication number: 20110274488
    Abstract: A porous pavement system and a method of maintaining the porous pavement system are disclosed. A combination of porous and non-porous pavers are laid out to create a porous pavement. A receptacle or retainer for receiving a tool is in incorporated into the porous pavers, to facilitate lifting the pavers by means of the tool. A cradle may be used to hold multiple pavers.
    Type: Application
    Filed: June 4, 2010
    Publication date: November 10, 2011
    Applicant: Porous Technologies, LLC
    Inventors: Gregg Novick, Gary Verril
  • Patent number: 7960042
    Abstract: Paving blocks for photocatalytic paving comprising at least a base layer in cementitious material and a surface layer based on a cementitious composition comprising: at least a hydraulic binder, a photocatalyst capable of oxidizing organic and inorganic polluting substances present in the environment in the presence of environmental light, air and humidity, at least an aggregate, water and, optionally, a water reducing additive.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: June 14, 2011
    Assignee: Italcementi S.p.A.
    Inventors: Luigi Cassar, Roberto Cucitore, Carmine Pepe
  • Patent number: 7823530
    Abstract: The present invention discloses an adjustable film applicator which comprises an applicator body, a first knife, a second knife, a first fixing apparatus, a second fixing apparatus, a pair of first adjusting screws, and a pair of second adjusting screws. The first and second knife are adjusted to a first and second height by adjusting the first and second adjusting screws, wherein the second height is greater than the first height.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: November 2, 2010
    Assignee: Chung Yuan Christian University
    Inventors: Kueir-Rarn Lee, Juin-Yih Lai, Se-Tsung Kao
  • Publication number: 20100260545
    Abstract: Paving system for mechanically paving with irregular paving stones, the paving system comprising a pre-ordering part (3; 10) for pre-ordering a set of irregular paving stones in an ordered configuration suitable for laying and a transferring part (5; 11) for transferring the set of irregular paving stones in the ordered configuration onto a foundation bed (7). The pre-ordering part and/or the transferring part is provided with a plurality of auxiliary guide rails (2; 18) provided for being accommodated in oblong recesses which are provided in the bottom sides of the stones from one lateral side up to another lateral side for overcoming differences in the thickness of the stones. The auxiliary guide rails extend at regular distances from each other, chosen to correspond with the spacing between the recesses, and have a predetermined shape, chosen to be complementary to that of the recesses.
    Type: Application
    Filed: September 10, 2008
    Publication date: October 14, 2010
    Inventor: Guido L. P. Van Camp
  • Publication number: 20090136296
    Abstract: A cobblestone mat usable for covering roads, sidewalks, patios, outside/inside walls, etc., is disclosed, comprising a plurality of predeterminedly shaped cobblestones disposed at a certain distance to each other and a binding net internally imparted into and joining the cobblestones. A method is provided for assembling concrete cobblestones and the net, comprising the steps of providing a mold for forming the mat, predeterminedly placing the net into the mold, pouring liquid concrete into therein, hardening the concrete, forming the mat, and extracting the mat from the mold. An automated device for making the mat is proposed. There are also described preferable shapes and sizes of the cobblestones and cobblestone mats. The invention permits achieving high quality covering even by low-experienced workers, expediting the covering, minimizing dust and noise at work site since it avoids cutting the cobblestones, decorating surfaces with imitation of natural stone appearance and various colors and designs.
    Type: Application
    Filed: November 27, 2007
    Publication date: May 28, 2009
    Inventor: Etrem Usdenski
  • Patent number: 7468406
    Abstract: A durable colored article having fluorescent properties comprises a substantially solventless polyvinyl chloride matrix, a thioxanthene fluorescent dye, and a secondary or tertiary hindered amine light stabilizer having a molecular weight less than about 1000 grams/mole. The invention has the advantage in that it provides a flexible polyvinyl chloride film that exhibits durable fluorescent colors.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: December 23, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kenneth M. White, Lee A. Pavelka, Vera L. Lightle, James C. Coderre
  • Publication number: 20080205985
    Abstract: Inflatable members for forming fascines for filling ditches or smoothing other discontinuities in or on the ground to facilitate the passage of vehicles across the discontinuity are normally carried uninflated in a package at one side of a vehicle such as a tank. The package can be moved from that stowed position to an operational position at the front of the vehicle, for example by swinging around a pivot located at the front corner of the vehicle, from which position the fascine members can be released and inflated. In this way there is no need for the vehicle to turn side on to the discontinuity in order to deploy the fascine.
    Type: Application
    Filed: June 19, 2006
    Publication date: August 28, 2008
    Inventors: Stephen James Roffey, Lloyd Morris Wye
  • Patent number: 7090586
    Abstract: An apparatus for an a method of closing a fixed gap in an activity surface such as a turfed race-track is described. The apparatus comprises a movable turf tray having an upper surface with the same characteristics as the activity surface and means for guiding the tray into the gap so as to wedge the tray releasably in the gap and thereby to provide a substantially continuous activity surface. The apparatus can be used to provide a reconfigurable racetrack crossing with the permanent road gap in the racetrack being closeable by means of the movable turf tray. Overlapping edges of the turf tray provide a weight wedging action which provides reliable pressure joins. This also has application for creating reconfigurable turfed activity surfaces such as are used in sports stadia and the like.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: August 15, 2006
    Assignee: Ascot Racecourse Limited
    Inventors: Robert Everett, Stephen Morley, Andrew Whitworth, Paul Morton
  • Publication number: 20040159667
    Abstract: Apparatus and method for applying temporary raised pavement markers (TRPM) to roadway surfaces comprises a conveyor upon a wheeled vehicle wherein an upstream end portion of the conveyor is able to extend, for example, over the rear bed portion of a roadwork vehicle so as to permit an operator, stationed upon the bed portion of the roadwork vehicle, to deposit pavement markers upon the conveyor. A pair of wheel applicators are used for applying the temporary raised pavement markers (TRPMs) onto the roadway surface. A hitch mechanism is also used to provide hinged movement between the tow bar of the towed wheeled vehicle and the mounting bar of the towing roadwork vehicle so as to permit independent elevational movement of the towed wheeled vehicle relative to the towing roadwork vehicle.
    Type: Application
    Filed: November 12, 2003
    Publication date: August 19, 2004
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventors: Jeffrey Rogers, Brad Anderson, Chad Orthaus, Jeffrey Arnold Wilkens
  • Patent number: 6752568
    Abstract: A device for placing individual road markers in desired configurations along a road surface comprises an application wheel having at least one aperture connected to a frame by an axle. The frame and application wheel are then connected to a trailer that is pulled along behind a pulling device. The apertures of the application wheel are dimensioned to receive a part of the road marker in a position tangential to the surface of the application wheel. As the application wheel rolls over the surface, the base portion of the marker contacts the road surface. An adhesive portion of the marker causes the base of the marker to become adhered to the road surface. As the application wheel continues to roll, the standing reflective portion of the marker is withdrawn from its position within aperture of the application wheel, and remains in a desired location upon the road surface.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: June 22, 2004
    Inventor: Mary Anna Jane Stone
  • Patent number: 6712548
    Abstract: Apparatus and method for applying temporary raised pavement markers (TRPM) to roadway surfaces comprises a conveyor upon a wheeled vehicle wherein an upstream end portion of the conveyor is able to extend, for example, over the rear bed portion of a roadwork vehicle so as to permit an operator, stationed upon the bed portion of the roadwork vehicle, to deposit pavement markers upon the conveyor. A pair of wheel applicators are used for applying the temporary raised pavement markers (TRPMs) onto the roadway surface. A hitch mechanism is also used to provide hinged movement between the tow bar of the towed wheeled vehicle and the mounting bar of the towing roadwork vehicle so as to permit independent elevational movement of the towed wheeled vehicle relative to the towing roadwork vehicle.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: March 30, 2004
    Assignee: Illinois Tool Works Inc.
    Inventors: Jeffrey Rogers, Brad Anderson, Chad Orthaus, Jeffrey Arnold Wilkens
  • Publication number: 20040057796
    Abstract: Apparatus and method for applying temporary raised pavement markers (TRPM) to roadway surfaces comprises primary and auxiliary conveyors wherein an upstream end portion of the primary conveyor is able to extend, for example, over the rear bed portion of a roadwork truck so as to permit an operator, stationed upon the bed portion of the truck, to deposit pavement markers upon the primary conveyor. In accordance with a first embodiment of the invention, a slide mechanism is disposed adjacent to a downstream end portion of the primary conveyor and adjacent to an upstream end portion of the auxiliary conveyor for transferring pavement markers from the primary conveyor to the auxiliary conveyor when the absence of a pavement marker upon the auxiliary conveyor is detected. When pavement markers are present upon both conveyors, the pavement markers are conducted to applicator mechanisms for application to the roadway surface.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 25, 2004
    Inventors: Jeffrey Rogers, Michael Christensen, John Kirckof, Jeffrey Arnold Wilkens, Brad Anderson
  • Patent number: 6595718
    Abstract: A system and method for removing and replacing rigid pavement sections in highways, bridge decks, airport runways, and various other similar structures are provided. The system typically includes a lifting frame which attaches to a damaged slab and is removed with the slab as a unit in a single operation. The frame may also be used to reinstall a replacement slab or panel while acting as external reinforcement. The frame may also serve to align the replacement panel in the void left by the removed section while under-bedding material is installed and cured under the new panel. The system may also utilize a unique saw cutting method and joint splicing method which accomplish a completed removal and replacement process which is faster, cheaper, and stronger than prior art methods. The system reduces the downtime required for replacement of transportation system facilities using rigid pavement, which are in need of repair by replacement.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: July 22, 2003
    Assignee: Works R&D, Inc.
    Inventor: William Bruce Smith
  • Patent number: 5867965
    Abstract: A fully portable, self-contained tile setting machine has a battery driven vibrator and a manually actuable suction pad with which the tile is secured. Out-rigger arms provide visual datum by which the tile in-process can be set level with two adjoining, previously set tiles or other reference surfaces, and a manual release of the suction pad permitting unimpeded removal of the setting machine from the just-set tile. The degree of vibration of the machine is adjustable, to permit modulation of the extent of vibration imparted to the tile, in setting it.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: February 9, 1999
    Inventors: Jack Pilz, Dario Sanchez
  • Patent number: 5507592
    Abstract: This is a cement applicator which lays a course of cement or mortar on a cement block without losing any of the cement in the apertures of the block. It comprises a semicircular trough having a handle centrally positioned on it external surface and which is charged with cement and then inverted over the area on which the operator wishes to lay a course of cement.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: April 16, 1996
    Inventor: Joseph E. McConnell
  • Patent number: 5037236
    Abstract: A stone-laying machine is provided have laying tongs fixed to a boom arm which can be controlled from the driver's cab. The front and rear wheels of the machine are rotatable about points of rotation lying on a longitudinal center line behind the front axle and in front of the rear axle, respectively. In order to prevent overturning of the machine when the front and rear axles are swivelled in relation to one another, the center of gravity of the machine is altered with respect to conventional stone-laying machines by relocating the boom arm relative to the front axle.
    Type: Grant
    Filed: August 10, 1989
    Date of Patent: August 6, 1991
    Inventor: Martin Probst
  • Patent number: 4893451
    Abstract: The disclosure describes an apparatus for laying tiles or the like on a surface. The apparatus holds the tile over a surface portion which is covered with an adhesive material and on which the tile is intended to be laid, and allows it to contact the adhesive. A vibration is produced so that when the tile is in contact with the surface portion covered with the adhesive material, it becomes embedded therein thereby being fixed on the surface portion. Thereafter, the tile is released. The apparatus advantageously replaces the common practice of laying tiles by hand.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: January 16, 1990
    Assignee: Antonietta Investments Ltd.
    Inventor: Pietro Valente
  • Patent number: 4846601
    Abstract: A method and apparatus for laying bricks in a herringbone pattern, in the preferred embodiment by a tongs motion, and for packeting bricks in a herringbone pattern.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: July 11, 1989
    Assignee: Luijten Holding B.V.
    Inventor: Arend Luijten
  • Patent number: 4740102
    Abstract: A carrier machine for laying sidewalk curbs or paving stones combines pallet transportation forks with a lifting device mounted on an orientable horizontal distribution apparatus, with a prehensive member for grasping the items to be laid and a control to be operated by the laying operator. The control is placed on the prehensive member.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: April 26, 1988
    Inventors: Jean-Marie G. R. Koehl, Alain J. Koehl, Francois A. Koehl
  • Patent number: 4583879
    Abstract: A paving method and a grab for carrying out the method. A group or unit of paving stones or bricks, arranged in a selected pattern, is clamped, picked up, and laid on a prepared sand bed, in contiguity with paving components already laid, by releasing the clamping and pressing against said paving components. Tilting or jamming of stones or bricks is prevented by the exercise of a downward force on at least the border stones or bricks or border rows bordering the paving components referred to at least at the moment when the clamping is released.
    Type: Grant
    Filed: January 17, 1984
    Date of Patent: April 22, 1986
    Assignee: Aannemingsbedrijf Luymes & Bal en van der Straaten B.V.
    Inventor: Hendrik Hofman
  • Patent number: 4479739
    Abstract: A road construction machine for paving road surfaces with road stones or the like is disclosed which moves over the paved surface which has already been laid, without the use of guide rails. The machine carries a supply of road stones supported on a lift table. Each uppermost road stone slab is removed from the supply stack and inserted into a semi-circularly shaped transfer chute positioned at the forward end of the paving machine. The road stones are conducted through the chute and deposited onto the subgrade surface so as to be pressed sequentially against a previously laid pavement stone. As the road construction machine moves forwardly along the paved surface in the direction of the paving operation, hydraulic ram means serve to firmly press and flatten the laid stones into paving condition on the subgrade surface, utilizing the weight of the slab stack carried in the machine.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: October 30, 1984
    Inventor: Otfried W. Schweikert
  • Patent number: 4322177
    Abstract: Method for forming a retro reflective traffic regulating road surface marking and roadable areas produced therewith.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: March 30, 1982
    Inventor: Ludwig Eigenmann
  • Patent number: 4320985
    Abstract: Apparatus for the setting of paving blocks includes a movable chassis, an outrigger arm mounted on the chassis for heightwise adjustment, and grab tong devices suspended from the outrigger arm, the grab tong devices each being operable to grip a group of paving blocks laterally. Each of the grab tong devices has opposed jaws, one of which is fixedly mounted and the other of which is movably mounted, and linkage means are provided to operably mount the movable jaw such that upon suspension of the grab tong device from the outrigger arm with paving blocks disposed between the opposed jaws, the linkage means is operable to effect a clamping action on the paving blocks to thereby provide for lifting of the paving blocks with the clamping force being proportional to the weight being lifted.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: March 23, 1982
    Assignee: Optimas Bauelemente und Baugerate GmbH
    Inventor: Harald Kleinemas
  • Patent number: 4277201
    Abstract: A transportable roadway which can be folded layer upon layer on a flat bed ransporter/launcher vehicle and be easily deployed in a swampy or marshy area to provide a temporary roadway during military operations. The roadway comprises a plurality of sections each including an array of edge to edge planks bonded to a flexible membrane or fabric, with adjoining sections being connected by hinges connecting the end planks of each section in such a way that the roadway can be folded for transport and easily deployed from said transporter/launcher, either from the front or rear thereof.
    Type: Grant
    Filed: January 25, 1980
    Date of Patent: July 7, 1981
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: William R. Abell
  • Patent number: 4264232
    Abstract: A method and device for collecting a layer of concrete paving bricks forming a brick disk in the form of a stretcher bond which may be used as one setting unit, is characterized in that the layer of the paving bricks is clamped together laterally with a collecting clamp with respect to their longitudinal axes for aligning purposes and, after releasing the collecting clamps, each row of bricks is individually clamped to their respective position at their head ends with clamps. The clamps with the clamped rows of bricks are then displaced with respect to each other in a parallel direction to achieve the desired setting arrangement and the collecting clamp is again engaged.
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: April 28, 1981
    Assignee: Firma Axel Holger Lehnen, Vermietung-Verpachtung-Leasing
    Inventor: Egon Schnier
  • Patent number: 4249358
    Abstract: Method and apparatus for forming and laying paving blocks in which interchangeable grids are provided of dissimilar configuration comprising a plurality of mould cavities each enclosing one or more fixed centers of the modules of the pattern, whatever is in the conformation of the said grids. The modular and transformable ramming assembly comprises a plurality of fixed securing points distributed to correspond to the fixed centers of the modules of the mould pattern and intended for the removable fitting of ramming plates of forms and dimensions analogous with those of the underlying cavities of the selected grid. The changing of forms and/or dimensions of the moulded paving stones or slabs is effected by replacing one grid by another differently conformed grid and by fixing new removable ramming plates corresponding to the forms and/or dimensions of the cavities of the new grid, by means of the said fixing points.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: February 10, 1981
    Assignee: "P.B.I." Procedes et Brevets Industriels
    Inventor: Luc Thieffry
  • Patent number: 4227834
    Abstract: A machine for assisting in the laying of courses of blocks to form a ground covering layer in erosion control systems has a flexible apron on which the blocks are laid, a frame attached to one side of the apron, and two spaced and independently actuable pusher bar assemblies, which can act between the frame and the blocks to position the blocks, steer the machine, and withdraw the apron from beneath the blocks.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: October 14, 1980
    Assignee: Terrafix Erosion Control Products, Inc.
    Inventor: Robert E. Crowe
  • Patent number: 4194853
    Abstract: A method of producing a ground covering from individual paving stones by arranging a group of individual paving stones in the form of a section of the ground covering to be produced, grasping the group by means of a lateral compressive force from two opposed sides leaving out the lower range of the paving stones in laid condition, hoisting and moving the group thus grasped to the place of laying, and depositing the group there. The vertical distribution of the compressive force is so selected that it is greater in the lower range of grasp than in the upper range of grasp.An apparatus for carrying out this method includes a laying vehicle which carries a gripping tongs, the gripping faces of which are movable at least vertically by a means of the laying vehicle and are formed by linings diverging from the bottom to the top.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: March 25, 1980
    Inventors: Gunter Barth, Fritz von Langsdorff, Kurt Rossmann
  • Patent number: 4168130
    Abstract: Apparatus for taking paving elements from a store of such elements, moving them over a placing position and placing them successively onto the subsoil. In one preferred form the apparatus comprises a fork-lift truck having a mast, a jib carried by that mast, swivel means permitting the jib to be swivelled about an upright swivelling axis, a trolley adapted to run along the jib, elevator means for raising and lowering the load carrier, and the arrangement being such that the load carrier can take the paving elements from the store irrespective of the swivelling position of the jib. In a second preferred form the arrangement is such that the load carrier having a plurality of suction apertures to engage respective paving elements can take the paving elements as they have passed an aligning device for a simultaneous alignment of a plurality of roughly aligned paving elements.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: September 18, 1979
    Assignees: Dr. Barth KG, F. von Langsdorff Bauverfahren GmbH
    Inventors: Gunter Barth, Fritz VON Langsdorff