Patents by Inventor Roland Krapp

Roland Krapp 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: 7565890
    Abstract: A rail used as a torsional stop for the valve train of an internal combustion engine is disclosed. The rail includes spaces (10) which are arranged in a row spaced apart at a distance from one another within the rail (8) and accommodate inserted valve lifters provided as roller tappets (9). Two parallel torsional stop areas (15) are configured on the outer surface of each roller tappet (9) in the form of planar flattened zones in order to secure the roller tappet (9) against rotation about the central longitudinal axis thereof. The torsional stop areas (15) rest against guide areas of the rail (8), which are located inside the associated accommodating space (10).
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: July 28, 2009
    Assignee: Schaeffler KG
    Inventors: Hermann Keller, Roland Krapp
  • Patent number: 7431001
    Abstract: A rail used as a torsional stop for the valve train of an internal combustion engine is disclosed. The rail includes spaces (10) which are arranged in a row spaced apart at a distance from one another within the rail (8) and accommodate inserted valve lifters provided as roller tappets (9). Two parallel torsional stop areas (15) are configured on the outer surface of each roller tappet (9) in the form of planar flattened zones in order to secure the roller tappet (9) against rotation about the central longitudinal axis thereof. The torsional stop areas (15) rest against guide areas of the rail (8), which are located inside the associated accommodating space (10).
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: October 7, 2008
    Assignee: Schaeffler KG
    Inventors: Hermann Keller, Roland Krapp
  • Publication number: 20080149870
    Abstract: A distributing valve, in particular a hydraulic 3/2 path distributing valve is provided, having an actuating unit (1) and a valve unit (2) interacting therewith, wherein the actuating unit (1) includes at least one coil (3) and a movable armature (4), the valve unit (2) includes a valve element interacting with the armature (4), controlling connections between the valve unit (2) channels for directing a pressure medium and is provided with sealing bodies (13, 15) corresponding to valve seats (8, 9) pressed against the valve unit (2) housing, and a valve body (11) interacting with the armature (4), guided in the valve unit (2) housing (tubular body (6)) of the valve unit (2) and is connect to the sealing bodies (13,15).
    Type: Application
    Filed: November 15, 2005
    Publication date: June 26, 2008
    Applicant: SCHAEFFLER KG
    Inventors: Armin Braun, Gunther Swarat, Roland Krapp
  • Publication number: 20080011252
    Abstract: A rail used as a torsional stop for the valve train of an internal combustion engine is disclosed. The rail includes spaces (10) which are arranged in a row spaced apart at a distance from one another within the rail (8) and accommodate inserted valve lifters provided as roller tappets (9). Two parallel torsional stop areas (15) are configured on the outer surface of each roller tappet (9) in the form of planar flattened zones in order to secure the roller tappet (9) against rotation about the central longitudinal axis thereof. The torsional stop areas (15) rest against guide areas of the rail (8), which are located inside the associated accommodating space (10).
    Type: Application
    Filed: July 2, 2007
    Publication date: January 17, 2008
    Applicant: SCHAEFFLER KG
    Inventors: Hermann Keller, Roland Krapp
  • Publication number: 20070283910
    Abstract: A rail used as a torsional stop for the valve train of an internal combustion engine is disclosed. The rail includes spaces (10) which are arranged in a row spaced apart at a distance from one another within the rail (8) and accommodate inserted valve lifters provided as roller tappets (9). Two parallel torsional stop areas (15) are configured on the outer surface of each roller tappet (9) in the form of planar flattened zones in order to secure the roller tappet (9) against rotation about the central longitudinal axis thereof. The torsional stop areas (15) rest against guide areas of the rail (8), which are located inside the associated accommodating space (10).
    Type: Application
    Filed: July 2, 2007
    Publication date: December 13, 2007
    Applicant: SCHAEFFLER KG
    Inventors: Hermann Keller, Roland Krapp
  • Patent number: 7275507
    Abstract: A rail used as a torsional stop for the valve train of an internal combustion engine is disclosed. The rail includes spaces (10) which are arranged in a row spaced apart at a distance from one another within the rail (8) and accommodate inserted valve lifters provided as roller tappets (9). Two parallel torsional stop areas (15) are configured on the outer surface of each roller tappet (9) in the form of planar flattened zones in order to secure the roller tappet (9) against rotation about the central longitudinal axis thereof. The torsional stop areas (15) rest against guide areas of the rail (8), which are located inside the associated accommodating space (10).
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: October 2, 2007
    Assignee: Schaeffler KG
    Inventors: Hermann Keller, Roland Krapp
  • Patent number: 7159553
    Abstract: The invention provides a valve train for an internal combustion engine, comprising an elongate anti-rotation bridge (16) acting as a retention device and a mounting aid and comprising receptions (18) for valve lash adjusters arranged spaced behind one another. A valve adjuster configured as a roller tappet (17) is arranged in each reception (18) while being directed through a tappet roller (22) toward a cam of a camshaft. The roller tappet (17) is retained for longitudinal displacement in the reception (18) and is secured against rotation through flat key surfaces arranged on its outer peripheral surface that bear against corresponding inner surfaces of the anti-rotation bridge (16).
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: January 9, 2007
    Assignee: Schaeffler KG
    Inventors: Roland Krapp, Peter Sailer
  • Publication number: 20060207528
    Abstract: The invention provides a valve train for an internal combustion engine, comprising an elongate anti-rotation bridge (16) acting as a retention device and a mounting aid and comprising receptions (18) for valve lash adjusters arranged spaced behind one another. A valve adjuster configured as a roller tappet (17) is arranged in each reception (18) while being directed through a tappet roller (22) toward a cam of a camshaft. The roller tappet (17) is retained for longitudinal displacement in the reception (18) and is secured against rotation through flat key surfaces arranged on its outer peripheral surface that bear against corresponding inner surfaces of the anti-rotation bridge (16).
    Type: Application
    Filed: December 21, 2005
    Publication date: September 21, 2006
    Inventors: Roland Krapp, Peter Sailer
  • Publication number: 20060169227
    Abstract: A rail used as a torsional stop for the valve train of an internal combustion engine is disclosed. The rail includes spaces (10) which are arranged in a row spaced apart at a distance from one another within the rail (8) and accommodate inserted valve lifters provided as roller tappets (9). Two parallel torsional stop areas (15) are configured on the outer surface of each roller tappet (9) in the form of planar flattened zones in order to secure the roller tappet (9) against rotation about the central longitudinal axis thereof. The torsional stop areas (15) rest against guide areas of the rail (8), which are located inside the associated accommodating space (10).
    Type: Application
    Filed: December 16, 2003
    Publication date: August 3, 2006
    Applicant: INA-Schaeffler KG
    Inventors: Hermann Keller, Roland Krapp