Patents by Inventor Patrick D. Holverson

Patrick D. Holverson 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).

  • Closed granular chemical handling system
    Patent number: 5379812
    Abstract: A closed granular chemical handling system comprising a dispensing valve and a receiving valve. The dispensing valve and the receiving valve are automatically opened when the valves are coupled together, and are automatically closed when the valves are uncoupled from one another. The valves are configured so that the receiving valve always is the first to open and the last to close. The valves are driven together by a camming structure having a neutral portion that acts as a delay between the opening and closing of both valves so as to allow granular material to flow from between the valves through the receiving valve.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: January 10, 1995
    Assignees: Deere & Company, American Cyanamid
    Inventors: Myron L. McCunn, Donald K. Landphair, Richard M. Neysinck, Richard A. DePauw, William R. Lundie, Douglas P. Brown, Jeffrey A. Hoffman, Frank D. Tenne, Patrick D. Holverson, Keith Woodruff
  • Closed granular chemical handling system
    Patent number: 5224527
    Abstract: A closed granular chemical handling system comprising a dispensing valve and a receiving valve. The dispensing valve and the receiving valve are automatically opened when the valves are coupled together, and are automatically closed when the valves are uncoupled from one another. The valves are configured so that the receiving valve always is the first to open and the last to close. The valves are driven together by a camming structure having a neutral portion that acts as a delay between the opening and closing of both valves so as to allow granular material to flow from between the valves through the receiving valve.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: July 6, 1993
    Assignees: Deere & Company, American Cyanamid
    Inventors: Myron L. McCunn, Donald K. Landphair, Richard M. Neyrinck, Richard A. DePauw, William R. Lundie, Douglas P. Brown, Jeffrey A. Hoffman, Frank D. Tenne, Patrick D. Holverson, Keith Woodruff
  • Closed granular chemical handling system
    Patent number: 5125438
    Abstract: A closed granular chemical handling system comprising a dispensing valve and a receiving valve. The dispensing valve and the receiving valve are automatically opened when the valves are coupled together, and are automatically closed when the valves are uncoupled from one another. The valves are configured so that the receiving valve always is the first to open and the last to close. The valves are driven together by a camming structure having a neutral portion that acts as a delay between the opening and closing of both valves so as to allow granular material to flow from between the valves through the receiving valve.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: June 30, 1992
    Assignees: Deere & Company, American Cyanamid Corp.
    Inventors: Myron L. McCunn, Donald K. Landphair, Richard M. Neyrinck, Richard A. DePauw, William R. Lundie, Douglas P. Brown, Jeffrey A. Hoffman, Frank D. Tenne, Patrick D. Holverson, Keith Woodruff
  • Container for supplying agricultural treatment agents in a closed application system
    Patent number: 5119972
    Abstract: The present invention provides a container for use in a closed application system for liquid or granular agricultural treatment agents. The agent is introduced into the container through an inlet opening on the upper surface of the container. Thereafter, a valve is removably mounted to seal the inlet opening and prevent inadvertant discharge of the liquid from the container. Hand grips are provided to manipulate the container, and the container is configured so that it nested or stacked on other similar containers having valves extending from the respective inlet openings when the containers are transported in an upright position. The handgrips are also employed to mount the containers in an inverted position in agricultural application equipment.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: June 9, 1992
    Assignee: American Cyanamid Company
    Inventors: David Reed, Frank D. Tenne, Patrick D. Holverson, Jeffrey A. Hoffman
  • Closed granular chemical handling system
    Patent number: 5060701
    Abstract: A closed granular chemical handling system comprising a dispensing valve and a receiving valve. The dispensing valve and the receiving valve are automatically opened when the valves are coupled together, and are automatically closed when the valves are uncoupled from one another. The valves are configured so that the receiving valve always is the first to open and the last to close. The valves are driven together by a camming structure having a neutral portion that acts as a delay between the opening and closing of both values so as to allow granular material to flow from between the valves through the receiving valve.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: October 29, 1991
    Assignee: Deere & Company
    Inventors: Myron L. McCunn, Donald K. Landphair, Richard M. Neyrinck, Richard A. DePauw, William R. Lundie, Douglas P. Brown, Jeffrey A. Hoffman, Frank D. Tenne, Patrick D. Holverson, Keith Woodruff
  • Closed granular chemical handling system
    Patent number: 5029624
    Abstract: A closed granular chemical handling system comprising a dispensing valve and a receiving valve. The dispensing valve and the receiving valve are automatically opened when the valves are coupled together, and are automatically closed when the valves are uncoupled from one another. The valves are configured so that the receiving valve always is the first to open and the last to close. The valves are driven together by a camming structure having a neutral portion that acts as a delay between the opening and closing of both valves so as to allow granular material to flow from between the valves through the receiving valve.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: July 9, 1991
    Assignee: Deere & Company
    Inventors: Myron L. McCunn, Donald K. Landphair, Richard M. Neyrinck, Richard A. DePauw, William R. Lundie, Douglas P. Brown, Jeffrey A. Hoffman, Frank D. Tenne, Patrick D. Holverson, Keith Woodruff