Patents by Inventor Kenneth E. Puff

Kenneth E. Puff 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: 6598856
    Abstract: A portable hydraulic stake puller includes a hydraulic cylinder that extends to raise a jaw assembly. The jaw assembly pivots, while being raised, to grab and trap the stake. A grab hook may alternatively extract similar items not readily removable with the jaw assembly. The jaw or chain tension is controllably released when the control lever is released at any height of the stroke. Squeezing the control lever can again attain grip easily. The gripping action of the jaw is attained by at least friction against the jaw. When the control lever is released, the entire lift assembly returns to the neutral position under a spring tension. The hydraulic stake puller is mounted on wheels and controlled via handles allowing easy maneuvering.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: July 29, 2003
    Inventors: Kenneth E. Puff, Erwin B. Puff, Eric W. Jaslow