Patents by Inventor Rolf Keller

Rolf Keller 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).

  • Patent number: 9200376
    Abstract: A device for simultaneous coating of a plurality of workpieces is described, the plurality of workpieces being situated in a shared flow shaft through which an electrolyte flows, and each workpiece being connected electrically conducting to at least one component electrode and being electrically insulated in relation to at least one bath electrode, and a plurality of flow channels and a flow distributor for distributing the electrolyte stream to the plurality of flow channels further being situated in the flow shaft, the at least one bath electrode being situated in one of the flow channels.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: December 1, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Rolf Keller, Michael Lingner, Harald Bauer
  • Patent number: 8656591
    Abstract: A fuel injector for fuel injection systems of internal combustion engines includes a solenoid coil; an armature acted upon in a closing direction by a restoring spring; and a valve needle, which is connected to the armature in force-locking manner and on which a valve-closure member is formed, which forms a sealing seat together with a valve seat surface. The armature strikes against a stop face of an inner pole of the solenoid coil by way of a stop face, and the armature stop face is provided with a coating. The coating has a surface structure.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: February 25, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Manfred Roessler, Achim Degel, Rolf Keller, Markus Gesk, Guido Pilgram, Bernd Einwiller, Norbert Keim, Michael Lingner
  • Publication number: 20120175260
    Abstract: A device for simultaneous coating of a plurality of workpieces is described, the plurality of workpieces being situated in a shared flow shaft through which an electrolyte flows, and each workpiece being connected electrically conducting to at least one component electrode and being electrically insulated in relation to at least one bath electrode, and a plurality of flow channels and a flow distributor for distributing the electrolyte stream to the plurality of flow channels further being situated in the flow shaft, the at least one bath electrode being situated in one of the flow channels.
    Type: Application
    Filed: May 11, 2010
    Publication date: July 12, 2012
    Inventors: Rolf Keller, Harald Bauer, Michael Lingner
  • Publication number: 20110305823
    Abstract: A fuel injector for fuel injection systems of internal combustion engines includes a solenoid coil; an armature acted upon in a closing direction by a restoring spring; and a valve needle, which is connected to the armature in force-locking manner and on which a valve-closure member is formed, which forms a sealing seat together with a valve seat surface. The armature strikes against a stop face of an inner pole of the solenoid coil by way of a stop face, and the armature stop face is provided with a coating. The coating has a surface structure.
    Type: Application
    Filed: August 25, 2011
    Publication date: December 15, 2011
    Inventors: Manfred ROESSLER, Achim DEGEL, Rolf KELLER, Markus GESK, Guido PILGRAM, Bernd EINWILLER, Norbert KEIM, Michael LINGNER
  • Patent number: 8020789
    Abstract: A fuel injector for fuel injection systems of internal combustion engines includes a solenoid coil; an armature acted upon in a closing direction by a restoring spring; and a valve needle, which is connected to the armature in force-locking manner and on which a valve-closure member is formed, which forms a sealing seat together with a valve seat surface. The armature strikes against a stop face of an inner pole of the solenoid coil by way of a stop face, and the armature stop face is provided with a coating. The coating has a surface structure.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: September 20, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Manfred Roessler, Achim Degel, Rolf Keller, Markus Gesk, Guido Pilgram, Bernd Einwiller, Norbert Keim, Michael Lingner
  • Publication number: 20100032291
    Abstract: A device for surface treatment, in particular galvanic surface treatment, of workpieces, including at least one reactor housing, having at least one process chamber and being coverable by a cover, and a screen element which is spatially connected to the process chamber, and which has at least one receptacle for a workpiece to be treated, a fixing element having a smaller thermal expansion coefficient being situated between the reactor housing and the screen element, which defines their relationship relative to each other.
    Type: Application
    Filed: October 18, 2006
    Publication date: February 11, 2010
    Inventors: Rolf Keller, Harald Maus, Michael Lingner
  • Publication number: 20060151639
    Abstract: A fuel injector for fuel injection systems of internal combustion engines includes a solenoid coil; an armature acted upon in a closing direction by a restoring spring; and a valve needle, which is connected to the armature in force-locking manner and on which a valve-closure member is formed, which forms a sealing seat together with a valve seat surface. The armature strikes against a stop face of an inner pole of the solenoid coil by way of a stop face, and the armature stop face is provided with a coating. The coating has a surface structure.
    Type: Application
    Filed: July 2, 2003
    Publication date: July 13, 2006
    Inventors: Manfred Roessler, Achim Degel, Rolf Keller, Markus Gesk, Giudo Pilgram, Bernd Einwiller, Norbert Keim, Michael Lingner
  • Patent number: 4281539
    Abstract: A measuring apparatus for measuring forces acting upon a bearing, particularly the radial forces, effective at a roller bearing. The measuring apparatus essentially comprises two rings, typically formed of metal, which are concentrically interconnected by means of a web. The roller bearing transmits the force to be measured to one of the rings, whereas the other ring is fixed. The one ring rocks or moves in relation to the fixed ring and the deformation prevailing at the web is electrically measured and indicated in a display or indicator device. The measuring apparatus serves for measuring the tension in belts, bands, and the like.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: August 4, 1981
    Assignee: SRO-Kugellagerwerke J. Schmid-Roost AG
    Inventor: Rolf Keller
  • Patent number: 4099426
    Abstract: A transmission for locomotives, earthmoving vehicles or analogous conveyances has two closely adjacent parallel adjustable starting torque converters, one in the forward and the other in the reverse drive train, a common first gear train which connects the primary shafts of the starting converters with each other and with the input shaft, a second gear train which connects the secondary shafts of the starting converters with each other and with the output shaft, a cruising converter which is coaxial with the starting converter of the forward drive train and has a discrete secondary shaft coaxial with the secondary shaft of the respective starting converter and connected with the output shaft by a third gear train, a hydraulic brake whose rotor is driven by the secondary shaft of the starting converter of the reverse drive train and is effective only when the output shaft rotates in the forward direction, a first control unit which engages the brake and causes evacuation of working fluid from the working circu
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: July 11, 1978
    Assignee: Voith Getriebe KG
    Inventors: Rolf Keller, Erich Polzer