Patents by Inventor Rainer H. Andra

Rainer H. Andra 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).

  • Torsion vibration damper
    Patent number: 5388481
    Abstract: A torsional vibration damper has a longitudinal axis of rotation about which an inertial damping mass is disposed. The inertial damping mass, which may be in the form of a ring, surrounds the periphery of a central hub connected to a shaft to be damped. The hub is connected to the damping mass by an elastic ring disposed in the space between the damping mass and hub to connect the damping mass and hub. The elastic ring may be formed of rubber or other suitable elastomeric material, and has a longitudinal profile that varies along the circumferential direction of the elastic ring.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: February 14, 1995
    Assignee: Firma Carl Freudenberg
    Inventor: Rainer H. Andra
  • Torsional vibration damper
    Patent number: 5025681
    Abstract: A torsional vibration damper has a longitudinal axis of rotation about which an inertial damping mass is disposed. The inertial damping mass, which may be in the form of a ring, surrounds the periphery of a central hub connected to a shaft to be damped. The hub is connected to the damping mass by an elastic ring disposed in the space between the damping mass and hub to connect the damping mass and hub. The elastic ring may be formed of rubber or other suitable elastomeric material, and has a longitudinal profile that varies along the circumferential direction of the elastic ring.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: June 25, 1991
    Assignee: Firma Carl Freudenberg
    Inventor: Rainer H. Andra
  • Torsional vibration damper with an undulating damping ring
    Patent number: 5024120
    Abstract: A torsional vibration damper having a longitudinal axis of rotation includes a central hub and a rotatable inertial ring surrounding the central hub that are connected together by a damping element arranged in the clearance space between the hub and inertial ring. The damping element comprises an outer ring, an inner ring and a flange ring disposed therebetween. The outer ring is connected between substantially axially, opposed adhesive surfaces of the inertial ring and the flange ring, respectively. The inner ring is connected between substantially radially opposed, adhesive surfaces of the flange ring and the hub ring. The adhesive surfaces of the hub ring and the flange ring each surround the axis of rotation at a radial distance that continuously varies along the circumferential direction.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: June 18, 1991
    Assignee: Firma Carl Freudenberg
    Inventor: Rainer H. Andra
  • Process for manufacturing a torsional vibration damping device
    Patent number: 4961254
    Abstract: Process for manufacturing a torsional vibration damping device where a vulcanizable rubber mixture is placed in the interspace between a pot-like hub ring and an inertial ring. The hub ring is permanently expanded in radial direction following the vulcanization of the rubber mixture or the inertial ring is compressed towards the inside.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: October 9, 1990
    Assignee: Firma Carl Freudenberg
    Inventors: Rainer H. Andra, Gunter Ullrich