Patents by Inventor Donald C. Callas

Donald C. Callas 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).

  • 3-Wheeled levered trailing beam landing gear
    Patent number: 4412665
    Abstract: A three wheeled, generally in line, articulated landing gear with the lever trailing the lever hinge axis, applied in a pair. Each shock strut, axle, and rolling assembly counter twist 90.degree. upon retraction about a laterally offset post to present the smallest frontal area or pod size. The twisting mechanism, the door links and the over center down lock are all tied mechanically to the gear so that no other sequencing is required during gear retraction or extension.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: November 1, 1983
    Assignee: McDonnell Douglas Corporation
    Inventors: Louis T. Kramer, Franklin H. Butler, Donald C. Callas