Patents by Inventor Dennis A. Diggle

Dennis A. Diggle 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: 4499954
    Abstract: Apparatus and method for lubricating a string of hollow rods connected to a cone penetrometer within a probe hole, as used in geotechnical "in situ" testing. The rods have aligned bores to receive a drilling or lubricating fluid which passes along the rods to a perforated lubricating apparatus extending between an inner end of the string of rods and the cone penetrometer. Preferably a major portion of an outer surface of the lubricating apparatus is within a maximum cross-section of the cone penetrometer. A longitudinal bore within the lubricating apparatus communicates with a plurality of lubricating openings in the outer surface of the lubricating apparatus body. Thus lubricating fluid within the string of rods passes in to the longitudinal bore of the body and is dispersed through the plurality of the lubricating openings to the outer surface of the body, so as to stabilize side wall of the probe hole and to lubricate the string of drill rods within the probe hole.
    Type: Grant
    Filed: July 12, 1983
    Date of Patent: February 19, 1985
    Inventor: Dennis A. Diggle