Patents by Inventor Michael D. Holmgren

Michael D. Holmgren 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: 5676437
    Abstract: This invention concerns the improvements in a studless traction assembly for a vehicle track, including a stud, the vehicle track having an inner surface, an outer surface for contacting a support surface and an aperture extending from the inner surface to the outer surface. The improvements comprise a hollowed-out T-shaped nut. The hollowed-out T-shaped nut has a first end and a second end. An inner plate is located at the first end of the hollowed-out T-shaped nut and the inner plate has an undersurface for contacting the inner surface of the vehicle track. The improvement further comprises an outer washer. The outer washer has a center portion operably engageable with the second end of the hollowed-out T-shaped nut and the outer washer and the inner plate are adapted to contact a portion of the vehicle track therebetween upon operable engagement of the hollowed-out T-shaped nut and the outer washer with each other and the vehicle track.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: October 14, 1997
    Inventors: Michael D. Holmgren, Christopher J. Angelo