Patents by Inventor Douglas L. Pettit

Douglas L. Pettit 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: 6027053
    Abstract: The spinner spreader machine includes a funnel that is automatically or selectively repositionable and associated with the spinner. The funnel is used to vary the product spreading pattern or maintain a consistent product spreading pattern in combination with a varying product delivery rate as the machine traverses a geographic land area. The machine is used to disperse stored products over a geographic land area and advantageously reduces or eliminates product waste as well as surface and ground contamination that results from inefficient spreading of products.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: February 22, 2000
    Assignee: Ag-Chem Equipment
    Inventors: Dean I. Anderson, Douglas L. Pettit
  • Patent number: 4512789
    Abstract: Apparatus is disclosed for securing a filter bag in hanging suspension through an opening in a baffle plate in a bag housing, including a cover plate having an upwardly extending mouth and a downwardly extending sleeve, a pair of U-shaped clamps constraining the bag against the cover plate, and tensile spring members connected between the U-shaped clamps and over the cover plate.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: April 23, 1985
    Assignee: General Resource Corporation
    Inventors: Douglas L. Pettit, Calvin E. Piilola
  • Patent number: 4432499
    Abstract: Disclosed is a vehicle carrying a grinder-mixer providing a low bin profile and improved mixing through the use of complementing horizontal and vertical circulatory paths of the ground feed, which is produced by a pair of cooperating parallel auger conveyors extending in a horizontal plane along the bottom of the mixing bin in side by side relationship and rotating so as to move the feed in opposite directions, each feeding the other, in cooperation with a pair of vertical cooperating augers spaced axially of the horizontal augers and moving and mixing the ground feed along a circulatory path in vertical planes, the said horizontal and vertical circulatory paths intersecting to thereby greatly increase the mixing action. One of the horizontal augers is connected to a discharging system and is reversible to cooperate with the latter to empty the bin.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: February 21, 1984
    Assignee: Owatonna Manufacturing Company, Inc.
    Inventors: Larry L. Henkensiefken, Douglas L. Pettit, Gerald E. Barry