Patents by Inventor Mark Z. Christensen

Mark Z. Christensen 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: 5454625
    Abstract: A portable ice cart provides both elevation adjustment and tilt adjustment for the ice hopper. The ice cart includes a support frame that allows the ice hopper to be tilted to any of a plurality of orientations about a horizontal axis, and a scissors linkage for supporting the support frame at an adjustable elevation above the base of the cart. A retractable spring-loaded pin is used to lock the ice hopper in place after the desired orientation has been reached. The elevation of the ice hopper can be raised by pumping a foot pedal that pressurizes a hydraulic cylinder and extends the scissors linkage.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: October 3, 1995
    Assignee: Kloppenburg & Co.
    Inventors: Mark Z. Christensen, Ralph E. Williams