Patents Assigned to Rochumer Eisenhuette Heintzmann GmbH & Co. KG
  • Hydraulic prop
    Patent number: 4572480
    Abstract: An hydraulic prop utilized for barricades in blasting operations that affords simplified mounting and dismantling and will have minimal functional inefficiency if deformed by the impact of rocks; and it can be made out of unworked pipe of minimal standards. Two specific guide regions disposed on the piston are spaced large enough from each other that comparatively wide tolerances can be achieved between the piston and the cylinder.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: February 25, 1986
    Assignee: Rochumer Eisenhuette Heintzmann GmbH & Co. KG
    Inventors: Peter Heintzmann, Manfred Koppers, Friedel Amling, Karlheinz Bohnes