Patents by Inventor Harry L. Hackworth

Harry L. Hackworth 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: 4782962
    Abstract: A portable, backpackable crane lift involving a retractable boom, boom cable, winch and winch cable mounted to a wheeled frame with extendable axles all which fold into a compact unit. A shoulder harness apparatus which attaches to the folded unit for carrying converts to a ballast carrying extension of the frame during operation. Such a lift is readily carried up a ladder for use on flat roofs to raise and place air conditioning heat exchangers and the like.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: November 8, 1988
    Inventors: Harry L. Hackworth, Gerald D. Mitchell