Patents by Inventor Edward L. Koehnen

Edward L. Koehnen 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: 4030625
    Abstract: Hydraulically activated, spaced apart, front end loader support arms extend from a tractor. A loader attachment includes a vertically extending frame pivotally attached to the support arms forwardly of the tractor. This vertical frame includes a main horizontal frame support bar pivotally mounted in outer ends of the support arms, and a pair of open vertical guides which extend downwardly from the frame support bar. A horizontal hook support bar extends through the vertical guides and pivotally supports central portions of the two jaw-forming hooks at each end thereof. Upper ends of each of these hooks are pivotally connected to links which are pivotally connected to the frame support bar. A vertical hook support bar lifting strap extends integrally up from the hook support bar and is in sliding relationship with respect to the frame support bar. To load, means is provided to raise the lifting strap with respect to the main frame, thus to cause the jaws to be opened.
    Type: Grant
    Filed: August 26, 1976
    Date of Patent: June 21, 1977
    Inventor: Edward L. Koehnen
  • Patent number: RE29805
    Abstract: Hydraulically activated, spaced apart, front end loader support arms extend from a tractor. A loader attachment includes a vertically extending frame pivotally attached to the support arms forwardly of the tractor. This vertical frame includes a main horizontal frame support bar pivotally mounted in outer ends of the support arms and a a pair of open vertical guides which extend downwardly from the frame support bar. A horizontal hook support bar extends through the vertical guides and pivotally supports central portions of the two jaw-forming hooks at each end thereof. Upper ends of each of these hooks are pivotally connected to links which are pivotally connected to the frame support bar. A vertical hook support bar lifting strap extends integrally up from the hook support bar and is in sliding relationship with respect to the frame support bar. To load, means is provided to raise the lifting strap with respect to the main frame, thus to cause the jaws to be opened.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: October 17, 1978
    Inventor: Edward L. Koehnen