Patents Assigned to Atlas Copco Aktiebolag AB
  • Patent number: 5042363
    Abstract: The invention aims at bringing about a device for remote controlling of, for example, directional valves, which likewise allows a manual direct controlling, using a hand lever, for example. The control device includes a hydraulic cylinder (37) with ports (31,32) for feeding and evacuating, respectively, of hydraulic fluid, a piston (14) arranged in the cylinder (37), as well as a piston rod (13), for accomplishing the controlling function. The piston rod (13) is arranged to be slideably supported in the piston (14), allowing a limited movement of the piston rod (13) relative to the piston (14) independent of the pressure and load conditions in the cylinder (37), the movement possibility of the piston rod (13) being limited in at least one direction by a stop (17) arranged on the piston rod.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: August 27, 1991
    Assignee: Atlas Copco Aktiebolag AB
    Inventors: Lars P. Eriksson, Bengt-Goran Persson