Patents by Inventor David E. Kirk

David E. Kirk 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: 6365214
    Abstract: An apparatus for absorbing, containing, immobilizing, transporting and disposing of quantities of used cooking oil and/or other oils and hydrocarbons, comprising decomposed organic matter and/or inorganic matter.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: April 2, 2002
    Inventor: David E. Kirk
  • Patent number: 6109637
    Abstract: A bicycle frame uses an existing frame member--a seat stay--as a spring, and absorbs high frequency, low amplitude vibration with effective damping. The spring force constant can be adjusted for rider weight, riding style, road or terrain conditions, or the like, and the system is lightweight. Each seat stay is connected at a top end to the seat tube, and pivotally connected at the bottom end to the rear drop out, and has a circular arcuate curvature adjacent the bottom end with a radius of between about 11-16 inches and subtending an angle of between about 20-60 degrees. A damping/spring constant increasing element, comprising a metal strip bonded to elastomeric material (such as silicone) having a durometer between about 20-70 Shore A, is bolted to the seat stay convex arcuate portion, and can be replaced with a unit having a different durometer.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: August 29, 2000
    Assignee: Great American Bicycle Co., LLC
    Inventor: David E. Kirk