Patents by Inventor Alexis M. R. De Bruijn

Alexis M. R. De Bruijn 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).

  • Hydraulic twin-pipe shock absorber
    Patent number: 4673068
    Abstract: A hydraulic twin-pipe shock absorber for horizontal use and which is particularly suitable for use with rail vehicles. The shock absorber includes a cylindrical housing with a fluid-filled working cylinder provided inside the housing. A piston is displaceable in the working cylinder and is connected to a clearance between the housing and the working cylinder. The construction of the shock absorber removes air and foam from the working cylinder so that pressure builds up evenly and uniformly.
    Type: Grant
    Filed: January 16, 1986
    Date of Patent: June 16, 1987
    Assignee: Koni B. V.
    Inventor: Alexis M. R. De Bruijn