Patents by Inventor Charles R. Onsrud

Charles R. Onsrud 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: 4537234
    Abstract: A slide and actuator mechanism for the vertical travel of the cutting tool on an Inverted pin routing machine. A slide that provides a rigid support for the cutting spindle and is durable, unaffected by wood dust, adjustable for exact alignment with top mounted guide pin, and inexpensive to manufacture. The actuator lever that moves said slide vertically by applying lifting pressure at the balance point so that the cantilevered motor mount will not cock or bind on the shaft that it rides and thus allows for gravity retract of the motorized cutting tool. Conventional shaft and bushing slides of this type use two shafts with two to four bushings riding on both shafts requiring the shafts to be in absolute perfect alignment to avoid tight spots and binding over the entire travel of the slide. Otherwise expensive alignment devices on the shafts are incorporated or extremely accurate machining methods are required, both of which would put the product price out of the range of the intended market.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: August 27, 1985
    Inventor: Charles R. Onsrud
  • Patent number: 4030402
    Abstract: A rotary profile cutting machine is provided which includes supports for the workpiece and a slender cutting tool wherein a workpiece can be moved into the bite of the rotating tool. The tool is held at opposite ends in tension so as to minimize torsional and bending loads on the tool.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: June 21, 1977
    Inventor: Charles R. Onsrud