Patents by Inventor Larry Van Fossen

Larry Van Fossen 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: 5551167
    Abstract: A continuous-flow grain steeping and slow grain cooling process and apparatus. The continuous charging of hot, partially dried grain from a heated-air dryer into the top of a grain container in a layer of approximately uniform thickness is accomplished by use of grain spreading equipment. The downward flow of grain through the grain container is regulated by thermostatically controlled sweep and discharge augers located in the bottom of the bin. The grain flows at a rate that allows the grain to remain in a top steeping zone for a predetermined period of time, typically from four to twelve hours. After the initially charged grain is held at the steeping temperature for a predetermined steeping time, a continuous upward flow of ambient air is provided by a fan to cool the grain in a bottom cooling zone. The air flow is controlled by a thermostat to provide air flow at a rate that allows grain to remain in the cooling zone for a predetermined cooling time which is dependent on the airflow rate in cfm/bu.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: September 3, 1996
    Assignee: Iowa State University Research Foundation, Inc.
    Inventor: Larry van Fossen
  • Patent number: 5551168
    Abstract: A continuous-flow, slow grain cooling process including the charging of hot, partially dried grain from a heated-air grain dryer into the top of a grain container in an even layer. The downward flow of grain through the grain container is regulated at a rate that allows the grain to remain in a top steeping zone for from four to twelve hours. After the initially charged grain is held at the steeping temperature for a predetermined steeping time, a controlled upward flow of ambient air is provided to cool the grain in a bottom cooling zone. The air flow is provided at a rate that allows grain to remain in the cooling zone until it is cooled close to the ambient air temperature, but the upward flow is controlled such that it will not cool any grain until it has been properly steeped. Cooled dry grain from a layer near the bottom is then discharged from the bottom of the grain container.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: September 3, 1996
    Assignee: Iowa State University Research Foundation, Inc.
    Inventor: Larry Van Fossen
  • Patent number: 5468122
    Abstract: A process for uniformly removing wet grain in a layer of relatively uniform thickness from a wet grain container. Wet grain charged into the grain container is supported on an perforated or air-pervious floor supported above the bottom of the grain container. A continuous upward flow of ambient air travels in a path through the air-pervious floor and upwardly through the wet grain mass. A layer of wet grain of relatively uniform thickness is removed from the area immediately above the floor and discharged from the grain container for further processing such as heated-air drying.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: November 21, 1995
    Assignee: Iowa State University Research Foundation, Inc.
    Inventor: Larry Van Fossen