Patents by Inventor Marlene M. Helling

Marlene M. Helling 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: 4663796
    Abstract: A surface-working tool assembly having a surface-working tool connected by a quick releasable coupling to an elongate handle member. One portion of the coupling is connected to the tool and the other is connected to the handle. The tool portion is connected by a universal joint permitting rotational movement about first and second perpendicular axes. A female portion of the connecting means includes first and second telescopically engaged sleeves, the inner sleeve having a tubular passage and radial openings containing locking elements movable into and out of blocking relationship in the tubular passage.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: May 12, 1987
    Inventors: Loren L. Helling, Marlene M. Helling