Patents by Inventor David E. Beckham

David E. Beckham 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: 4257493
    Abstract: A hoisting system for use in elevating personnel or other materials preferably within a mine, or other low level installations, incorporating a capsule which is suspended by a singular cable that is fed out from a winding drum, a tension weight suspended below and in alignment with the capsule, being supported by the same cable, and a jib-crane assembly located at the upper reaches of the hoisting assembly to provide for feed out of the cable through its sheave assembly to furnish, at least initially, a lowering of the tension weight to its lowermost extent for coming to rest upon a base, while thereafter the continued unwinding or rewinding of the cable provides respectively for the lowering or raising of the capsule between various levels for effecting transfer of personnel and materials along the shaft heighth.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: March 24, 1981
    Assignee: Unidynamics/St. Louis, Inc.
    Inventor: David E. Beckham