Patents Assigned to Bauakademie d. Deutschen Dem. Republik
  • Hydraulic lifting cylinder-piston unit
    Patent number: 4930402
    Abstract: A hydraulic cylinder-piston unit comprises primary cylinder-piston unit with an integrated position regulation and with a primary cylinder and a primary piston movable in the primary cylinder, two displacement chambers in the primary cylinder and including two displacement pistons, a displacement piston rod connecting the displacement pistons with one another, and a separating wall, and differential cylinder-piston unit formed by the primary piston and having a differential cylinder provided with working chambers.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: June 5, 1990
    Assignee: Bauakademie d. Deutschen Dem. Republik
    Inventors: Hans Forchheim, Matthias Schlieder