Patents by Inventor Donald B. Lofquist

Donald B. Lofquist 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: 5269380
    Abstract: A mud scraper assembly includes a scraper blade mounted on the lower end of a scraper arm which in turn has a clamp at its upper end mounted on the sleeve of a depth gauge wheel support arm. No alteration of existing planter structure is required for adapting the mud scraper assembly to a Deere Max-Emerge planter and planters having generally the same structure. An adjustment screw is provided on the clamp for engaging the wheel support arm at a point remote to the shaft axis on which it is mounted to pivot the scraper arm into close proximity with the depth gauge wheels as needed.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: December 14, 1993
    Assignee: Lofquist Welding, Inc.
    Inventors: Donald B. Lofquist, Steven L. Lofquist