Patents by Inventor Richard J. Wolthuis

Richard J. Wolthuis 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: 5146731
    Abstract: An apparatus for bagging produce or other articles susceptible to damage upon impact. The apparatus includes a bag receiver and transfer assembly adapted to receive, hold upright, and gently transfer an open topped bag of articles, such as from an automatic bagger, to a bag closer and optional conveyor.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: September 15, 1992
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Dale E. Marshall, Galen K. Brown, Richard J. Wolthuis
  • Patent number: 5105605
    Abstract: An apparatus for bagging produce or other articles which minimizes the impact received by the articles as they are put into bags. The apparatus includes a bag support which may be positioned at a reduced angle to the horizontal to decrease the height of fall of the produce into the bag, but which also eliminates the problem of the formation of a single layer of the articles in the bag. The bag support may be used in conjunction with other produce bagging devices conventional in the art for automated or semi-automated bagging of produce or other articles.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: April 21, 1992
    Assignees: The United States of America as represented by the Secretary of Agriculture, Michigan State University
    Inventors: Dale E. Marshall, Patrick V. Gilliland, Richard J. Wolthuis, Galen K. Brown
  • Patent number: 5095686
    Abstract: An apparatus for the mechanical bagging or packaging of produce or other articles susceptible to damage upon impact. The apparatus includes a tiltable support for temporarily holding a quantity of produce and having an end portion for discharging the produce or articles when tilted. A bag positioning assembly is provided to position a bag around the support such that the end portion of the support is nearly adjacent the closed end of the bag. When the support is tilted, the produce or articles will settle towards the closed end of the bag. Because the bag is positioned around the support, the impact and damage to the produce or articles is minimized.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: March 17, 1992
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Dale E. Marshall, Galen K. Brown, Richard J. Wolthuis, Clyde L. Burton
  • Patent number: 4776156
    Abstract: Means to control imbalance of an eccentric mass connected to a rotating shaft in a shaker housing wherein the eccentric mass is adjacent to but is not fixedly connected to the shaft, wherein a first end of the mass is connected to a mass moving means which can move one end of the mass to a plurality of different distances from the rotating shaft, and is able to hold that end of the mass at each of these distances during rotation; wherein a second end of the mass is restrained from centrifugal movement during rotation of the shaft.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: October 11, 1988
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Galen K. Brown, Henry A. Affeldt, Jr., Thomas A. Esch, Richard J. Wolthuis
  • Patent number: 4320995
    Abstract: A novel flume hopper is employed in combination with a vacuum-operated hydraulic conveyor in a field or storage handling system for efficiently transferring produce to a holding tank without inflicting damage.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: March 23, 1982
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Bernard R. Tennes, Richard J. Wolthuis, Clyde L. Burton