Patents by Inventor Bernhard Walter
Bernhard Walter has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20030232206Abstract: A method for coating metal surfaces, excluding lithographic plates, includes either, in the sequence specified, (a) a step involving mechanical and/or chemical roughening of the metal surface to be coated; and a step involving coating of the roughened surface, wherein a layer with a thickness ranging from 100 nm to less than 1 &mgr;m is applied, or introducing a secondary phase as the roughening step at the same time as the coating step, wherein a layer with a thickness ranging from 100 nm to less than 1 &mgr;m is applied. A component produced with the method is also provided.Type: ApplicationFiled: June 19, 2003Publication date: December 18, 2003Inventors: Frank Jordens, Jurgen Salomon, Gerhard Schmidmayer, Bernhard Walter
-
Patent number: 6648781Abstract: An adjustable pulley for use in a continuously variable transmission has two coaxial flanges at least one of which is a composite flange having an annular main section with a conical surface adjacent a reinforcing liner of wear resistant material. The liner is secured to the main section of the composite flange by a one-piece or composite disc-shaped insert one side of which has several portions affixed (such as bonded and/or riveted) to the adjacent side of the liner, and the other side of which has several portions affixed to the conical surface and/or another part of the main section. Those portions of the one side of the insert which are affixed to the liner are out of register with those portions of the other side of the insert which are affixed to the main section to thus enable the liner to move relative to the conical surface in one or more directions other than circumferentially of the main section.Type: GrantFiled: May 17, 2000Date of Patent: November 18, 2003Assignee: K Lamellen und Kupplungsbau Beteiligungs KGInventors: Robert Fischer, Bernhard Walter, Christian Bauer, Oswald Friedmann
-
Patent number: 6585613Abstract: An infinitely variable transmission has a pair of driving conical flanges arranged on a first shaft and a pair of driven conical flanges arranged on a second shaft. Each pair has one axially movable conical flange and one axially fixed conical flange. The transmission is equipped with a locking device which when necessary can frictionally lock at least one driving conical flange to a driven conical flange.Type: GrantFiled: November 17, 2000Date of Patent: July 1, 2003Assignee: LuK Getriebe-Systeme GmbHInventors: Bernhard Walter, Kurt Graef, Rainer Eidloth
-
Patent number: 6576182Abstract: A process for producing a composite, containing at least one shrinkage-matched ceramic layer, wherein a starting material for the ceramic layer(s) has shrinkage behavior on sintering which is matched to remaining layer(s), and which is selected such that the ceramic-forming constituent of the same contains at least one ceramic powder of a specific size, and which process entails joining the layers of the composite by sintering.Type: GrantFiled: September 30, 1997Date of Patent: June 10, 2003Assignee: Institut Fuer Neue Materialien gemeinnuetzige GmbHInventors: Alberto Ravagni, Rüdiger Nass, Helmut Schmidt, Bernhard Walter
-
Patent number: 6506136Abstract: A continuously variable transmission wherein each of two parallel shafts carries a pulley having a fixed flange and a second flange movable axially of the shaft toward and away from the respective fixed flange. An endless torque transmitting chain or belt is trained over the two pulleys. At least one flange of at least one of the pulleys is assembled of two or more parts which consist of sheet metal and are welded and/or otherwise affixed to each other.Type: GrantFiled: May 7, 2001Date of Patent: January 14, 2003Assignee: LuK Geriebe-Systeme GmbHInventors: Jochen Schmid, Rainer Eidloth, Carsten Weinhold, Roland Hölz, Bernhard Walter
-
Publication number: 20030005772Abstract: A chamber in the interior of a housing communicates with the environment of the housing by means of a gas esxchange path, wherein a filter element with a hydrophobic and/or hydrophobicized, nanoporous material is placed in the gas exchange path. The chamber serves, e.g. to accomodate electronic circuitry, or it is chamed as a reference pressure chamber of a relative pressure sensor. The relative pressure sensor according to the present invention for capturing a measured pressure with respect to a reference pressure comprises a reference pressure path 23 which extends between a surface which can be exposed to the reference pressure and an opening in a reference pressure chamber 22, a filter element 30 which is arranged in the reference pressure path comprising a hydrophobic or hydrophobicized, nanoporous material. The filter element allows pressure compensation on account of its permeability to N2 and O2, while water molecules are selectively blocked.Type: ApplicationFiled: May 6, 2002Publication date: January 9, 2003Inventors: Frank Hegner, Andreas Rossberg, Elke Schmidt, Ulfert Drewes, Michael Kirst, Bernhard Walter
-
Publication number: 20020046629Abstract: A method of making a drill comprising a tip (16), a shank (10) and a flute area having chip spaces (12, 14) formed therein, the drill being substantially completely coated with a hard material, and is characterized by applying an abrasive material to merely the tip (16) before coating the drill with the hard material. The drill may more particularly be a solid carbide drill.Type: ApplicationFiled: August 10, 2001Publication date: April 25, 2002Inventors: Bernhard Walter Borschert, Dieter Hermann Muhlfriedel, Karl-Heinz Wendt
-
Patent number: 6375233Abstract: A transmission for use in the power train of a motor vehicle has a rotary first component (such as a shaft), a second component which may but need not be rotatable, a fluid-conveying conduit having a first end portion extending into a first socket provided in the first component and a second end portion extending into a socket of the second component, a split-ring piston packing located in an external groove of the first end portion, and an O-ring received in an external groove of the second end portion. The O-ring prevents the conduit and the second component from rotating relative to each other.Type: GrantFiled: May 18, 2000Date of Patent: April 23, 2002Assignee: LuK Getriebe-Systems GmbHInventors: Oswald Friedmann, Bernhard Walter, Manfred Homm, Michael Reuschel
-
Patent number: 6361470Abstract: An adjustable pulley for use in a continuous variable transmission in the power train of a motor vehicle has an axially fixed first conical flange and an axially movable second conical flange. The hydraulic control system which moves the second flange relative to the first flange is provided with at least one first plenum chamber which receives pressurized fluid when the second flange is to move toward the first flange, and with an additional plenum chamber which receives pressurized fluid when the second flange is to move away from the first flange. The admission of pressurized fluid into the additional chamber is regulated in dependency upon the RPM of the flanges. Rapid evacuation of pressurized fluid from the additional chamber can take place by way of a relief valve which opens when the pressure of fluid in the additional chamber rises to a preselected value. This renders it possible to rapidly shift between overdrive and underdrive.Type: GrantFiled: May 25, 2000Date of Patent: March 26, 2002Assignee: LüK Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Bernhard Walter
-
Patent number: 6361456Abstract: An infinitely variable transmission including a torque sensor, wherein torque is transmitted from a rotary input shaft to a rotary output shaft. The transmission includes adjustable sheaves for axial movement on the input and output shafts of the transmission and that are controlled by hydraulic piston and cylinder units. The torque sensor shifts the adjustable sheaves, which are urged towards each other by a force dependent upon the transmitted torque, into frictional engagement with an endless flexible element that drives the output shaft of the transmission. Retaining elements retain the hydraulic piston and cylinder units and adjustable sheaves on the input and output shafts of the transmission in a predetermined axial position when pressure is applied in a first direction during operation of the transmission, and permit the components to be shifted axially in the opposite direction to simplify assembly/disassembly procedures of the transmission and to reduce manufacturing costs.Type: GrantFiled: November 15, 1999Date of Patent: March 26, 2002Assignee: Luk Getriebe-Systeme GmbHInventor: Bernhard Walter
-
Patent number: 6342024Abstract: A continuously variable belt-drive transmission for a motor vehicle with two pairs of conical discs (11, 21) has a compact layout arrangement where the torque flows from a prime mover through an input shaft (2), start-up element (4), torque sensor (10), first conical-disc pair (11), chain-belt (25), second conical-disc pair (21), direction-reversing element (28), and output shaft (3) to the wheels of the vehicle.Type: GrantFiled: May 8, 2000Date of Patent: January 29, 2002Assignee: LuK Lamellen und Kupplungsbau GmbHInventors: Bernhard Walter, Anton Fritzer, Rainer Eidloth, Carsten Weinhold, Franz Bitzer
-
Patent number: 6336878Abstract: A continuously variable transmission for use in the power train of a motor vehicle has parallel input and output shafts, an adjustable pulley on each shaft, an endless torque transmitting chain or belt trained over the pulleys, and a torque sensor which transmits variable torque from the engine of the motor vehicle to the pulley on the input shaft. The torque sensor also serves to initiate and regulate the adjustments of the pulleys.Type: GrantFiled: May 18, 1999Date of Patent: January 8, 2002Assignee: LuK Getriebe-Systeme GmbHInventors: Matthias Ehrlich, Bernhard Walter
-
Publication number: 20010031678Abstract: A continuously variable transmission wherein each of two parallel shafts carries a pulley having a fixed flage and a second flange movable axially of the shaft toward and away from the respective fixed flange. An endless torque transmitting chain or belt is trained over the two pulleys. At least one flange of at least one of the pulleys is assembled of two or more parts which consist of sheet metal and are welded and/or otherwise affixed to each other.Type: ApplicationFiled: May 7, 2001Publication date: October 18, 2001Applicant: LUK GETRIEBE-SYSTEME GMBHInventors: Jochen Schmid, Rainer Eidloth, Carsten Weinhold, Roland Holz, Bernhard Walter
-
Patent number: 6263793Abstract: In a cylinder arrangement for a rotary printing press, the backlashes caused by traction of the drive gears must be compensated for. This is accomplished by using a cylinder that is able to compensate for the backlash and positioning the cylinder at a determinable rotational angle differential with respect to another cylinder in the cylinder arrangement.Type: GrantFiled: October 18, 1999Date of Patent: July 24, 2001Assignee: Koenig & Bauer AktiengesellschaftInventor: Bernhard Walter Wolfgang Muth
-
Patent number: 6241635Abstract: A continuously variable transmission wherein each of two parallel shafts carries a pulley having a fixed flange and a second flange movable axially of the shaft toward and away from the respective fixed flange. An endless torque transmitting chain or belt is trained over the two pulleys. At least one flange of at least one of the pulleys is assembled of two or more parts which consist of sheet metal and are welded and/or otherwise affixed to each other.Type: GrantFiled: March 9, 1999Date of Patent: June 5, 2001Assignee: LuK Getriebe-Systeme GmbHInventors: Jochen Schmid, Rainer Eidloth, Carsten Weinhold, Roland Hölz, Bernhard Walter
-
Patent number: 6234925Abstract: A continuously variable speed transmission with a first adjustable pulley on an input shaft, a second adjustable pulley on an output shaft, and an endless chain or belt trained over the pulleys employs at least one coil spring which biases one flange of one of the pulleys axially of the respective shaft. The coil spring has larger-diameter end convolutions and smaller-diameter intermediate convolutions. A plenum chamber of a torque sensor or of at least one of several piston-cylinder units—which serve to adjust the axially movable flanges of the pulleys—is bounded in part by a check valve in the form of a composite seal having a rigid annular element and an elastic annular element. One of the annular elements surrounds the other element.Type: GrantFiled: December 18, 1998Date of Patent: May 22, 2001Assignee: LuK Getriebe-Systeme GmbHInventor: Bernhard Walter
-
Patent number: 6190274Abstract: In a pair of conical disks (pulley halves) of an infinitely variable cone-pulley transmission, in the case where the conical disks are spaced apart, a pressure compartment through channels formed in a shaft A connects to a pressure chamber that serves to move one of the conical disks. The pressure compartment is on one side delimited by a piston-like part serving to modulate the pressure inside the compartment dependent on the torque acting on the pair of conical disks. By switching on the connection to the pressure compartment, the system pressure can be modulated not only dependent on the torque but also dependent on the transmission ratio. Advantageous designs of the valve arrangement for switching the pressure compartment on and off are described.Type: GrantFiled: May 18, 1999Date of Patent: February 20, 2001Assignee: LuK Getriebe-Systeme GmbHInventor: Bernhard Walter
-
Patent number: 6186917Abstract: A continuously variable speed transmission with two adjustable sheaves and an endless chain trained over the sheaves has a torque transmitting and monitoring unit which is installed between a prime mover, such as the engine of a motor vehicle, and an axially movable flange of one of the sheaves. The monitoring unit has two annular plenum chambers which are sealed from each other while the ratio of the transmission is within a first range, and which communicate with each other when the ratio is within a second range. A check valve between the two chambers can employ a resilient annular seal having a U-shaped cross-sectional outline. A radially outer annular portion of the seal has a lip which normally bears against the internal surface of an annular member of the valve.Type: GrantFiled: November 24, 1998Date of Patent: February 13, 2001Assignee: LuK Getriebe-Systeme GmbHInventors: Oswald Friedmann, Bernhard Walter
-
Patent number: 6174253Abstract: An infinitely variable transmission has a first pair of conical flanges arranged on a first shaft and a second pair of conical flanges arranged on a second shaft, where each pair has an axially movable flange and an axially fixed flange. A torque-transmitting means is disposed between the pairs of conical flanges. Piston/cylinder units and plenum chambers comprising circular ring-shaped elements serve to apply pressure to and effect axial movement of the movable conical flanges. The ring-shaped elements have radially inner portions with openings to receive the shafts. The radially inner portion of at least one of the ring-shaped elements has a welded seam connecting the ring-shaped element to the shaft received by its opening.Type: GrantFiled: December 18, 1998Date of Patent: January 16, 2001Assignee: LuK Getriebe-Systeme GmbHInventors: Bernhard Walter, Kurt Graef, Rainer Eidloth
-
Patent number: 6129188Abstract: A transmission for use in the power train of a motor vehicle has a rotary first component (such as a shaft), a second component which may but need not be rotatable, a fluid-conveying conduit having a first end portion extending into a first socket provided in the first component and a second end portion extending into a socket of the second component, a split-ring piston packing located in an external groove of the first end portion, and an O-ring received in an external groove of the second end portion. The O-ring prevents the conduit and the second component from rotating relative to each other.Type: GrantFiled: June 23, 1998Date of Patent: October 10, 2000Assignee: LuK Getriebe-Systeme GmbHInventors: Oswald Friedmann, Bernhard Walter, Manfred Homm, Michael Reuschel