Patents by Inventor Carroll E. Sherwin

Carroll E. Sherwin 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: 5535852
    Abstract: A lift apparatus is provided for raising or lowering objects through an opening in a ceiling which has associated ceiling supports, such as ceiling joists. The lift apparatus includes a frame, mounted to and supported by the ceiling supports, having first and second frame members, and a third frame member which extends between and is fixedly connected to the first and second frame members. A receptacle, for holding the objects and sized to fit through the ceiling opening, is fixedly connected to a movable guide mechanism slidably cooperating with at least one of the first or second frame members to allow substantially vertical movement of the receptacle between a retracted position, substantially above ceiling level, and an extended position substantially below ceiling level.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: July 16, 1996
    Inventors: David J. Bishop, Carroll E. Sherwin