Patents Assigned to Friedhelm Steinhilber
  • Hydraulic telescopic damper
    Patent number: 5131512
    Abstract: In a hydraulic telescopic damper with a cylinder (10) and a piston (12) which has a check valve (O-ring 18) and a narrow opening (22), a valve member (30) is mounted on the side of piston (12) away from the pressure side. Valve member (30) is urged by the force of a spring (36) in a locking position of piston (12) and keeps opening (22) closed. The telescopic damper thereby locks automatically. Exerting an additional manual force on the piston rod can release the self-locking action once more.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: July 21, 1992
    Assignee: Friedhelm Steinhilber
    Inventors: Friedhelm Steinhilber, Ludwig Bantle, Heinz Frochte