Patents by Inventor Hans P. Andra

Hans P. Andra 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).

  • Patent number: 5466068
    Abstract: An articulated bearing for the articulated transfer of heavy loads, e.g., from a bridge superstructure to a bearing pad, includes a pot connected to the bearing pad and a cover connected to the bridge. The cover extends vertically into the pot to form a sealed space vertically therebetween. A deformable, non-compressible cushioning medium (e.g., liquid or plastic) occupies the space and is loaded by the cover. Horizontal forces are withstood by a journal formed on the cover (or on the pot) and extending into a recess formed in the pot (or in the cover). The journal extends within the recess for less than the recess height to form a gap which is also occupied by the deformable medium to maximize the supporting area of that medium. A channel communicates the gap and space to equalize the pressure of the medium.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: November 14, 1995
    Inventors: Hans P. Andra, Wolfhart Andra