Patents by Inventor Hermann Rapp

Hermann Rapp 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).

  • Chain drive for internal-combustion engines
    Patent number: 6336881
    Abstract: A chain drive is used for driving camshafts, secondary shafts or the like, from a crankshaft, in an internal combustion engine. A tensioner blade and a sliding blade rest against the loose end and against the load end of a chain of the chain drive. For compensating component tolerances, the sliding blade and the tensioner blade are each disposed in an articulated manner at a proximal end via a bolt. An adjusting device is applied to a distal end of each of the sliding blade and the tensioner blade, respectively.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: January 8, 2002
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventors: Hermann Rapp, Klaus Groeger
  • Radial shaft sealing ring
    Patent number: 4911454
    Abstract: A radial shaft sealing ring comprises a stiffening ring as well as a sealing lip and an annular seal which are integrally combined by radial connecting sections running through notches in the stiffening ring. The annular seal is mounted in recesses in the stiffening ring, which have an increasing depth radially toward the driving surface.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: March 27, 1990
    Assignee: Firma Carl Freudenberg
    Inventors: Hermann Rapp, Konrad Mader, Volker Schwarz
  • Lip seal
    Patent number: 4568092
    Abstract: A seal comprises a disk flared to bear on a machine element to be sealed at two zones separated by an axial distance therealong has the machine element. The side of the flared disk along two hydrodynamically-acting back-feed elements which intersect each other.
    Type: Grant
    Filed: April 24, 1984
    Date of Patent: February 4, 1986
    Assignee: Firma Carl Freudenberg
    Inventors: Kunimatsu Hayashida, Hermann Rapp, Dieter Fuchs