Patents by Inventor Norman O. Aamodt

Norman O. Aamodt 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: 4506568
    Abstract: A strap wrench especially designed for removing oil filters. Both ends of the strap are retained in the wrench body and this forms a loop of the strap which passes around the oil filter. By applying a twisting action to the wrench body, the oil filter can be loosened with a minimum of torque applied to the wrench. The strap wrench comprises a strap structure which has its two ends formed into a loop structure. The two ends of the strap pass through both parts of a two-part holder structure. The two-part holder structure has one part inside the second part. Rotation of the inside part of the holder will lock the ends of the strap to the holder and further rotation of the holder then causes the strap to rotate the oil filter held in the loop of the strap.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: March 26, 1985
    Inventor: Norman O. Aamodt
  • Patent number: 4345494
    Abstract: A strap wrench especially designed for removing oil filters. The strap is retained at the end of the wrench by a retainer structure so that the strap is readily tightened on the oil filter and can be used to loosen the oil filter with minimum torque applied to the handle of the wrench.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: August 24, 1982
    Inventor: Norman O. Aamodt