Patents by Inventor David P. Fritz

David P. Fritz 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: 5463852
    Abstract: A harvester which uses a rotary style cutter bed has a series of rotary cutters extending across the path of travel of the machine and rotatable about individual upright axes. Part of the cutter bed is a flat gear case containing a train of intermeshed spur gears that serve to distribute power between the cutters above the gear train. Each end of the gear case has a hollow, gearless extension welded thereto which supports at least one additional outboard cutter that receives its driving power exteriorally of the gear case. One embodiment uses a mechanical drive to bring power to the upright shaft of the cutter having the first spur gear so that the cutters with gears receive all their power from the driven cutter.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: November 7, 1995
    Assignee: Hay & Forage Industries
    Inventors: Michael L. O'Halloran, Cecil L. Case, Martin E. Pruitt, David P. Fritz
  • Patent number: 5080009
    Abstract: An apparatus for forming large round bales of crop material includes a frame (10) having a pair of side walls (12, 14) and ground engaging wheels (18) mounted on the frame for supporting the apparatus for movement across the ground. A plurality of rollers (24, 26, 28, 30, 32, 34, 36, 38) are mounted for rotatable movement relative to the frame (10) and extend between the side walls (12, 14), and a plurality of endless bale forming belts (46) are trained about the rollers to define a bale forming chamber (16) in which large round bales of crop materials are formed. At least one additional chamber (48) is also defined by the bale forming belts (46) adjacent the bale forming chamber (16). A clean-out assembly (54) is provided for cleaning crop material from the additional chamber.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: January 14, 1992
    Assignee: Hay & Forage Industries
    Inventors: David P. Fritz, Ferol S. Fell, Howard J. Ratzlaff
  • Patent number: 4637201
    Abstract: Standing crops severed by sickle mechanism at the leading edge of the machine are swept upwardly and rearwardly along a platform by a rotating reel to a lower, center-gathering auger and an upper, spaced distributing auger that converge the materials centrally and distribute them evenly across a discharge opening ahead of rearwardly positioned conditioning rolls. As severed materials pass through the machine, the flow is gently and progressively converged vertically due to the distances between the reel and the underlying platform, the two augers, and the conditioning rolls becoming progressively smaller.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: January 20, 1987
    Assignee: Hesston Corporation
    Inventors: Martin E. Pruitt, Cecil L. Case, David P. Fritz
  • Patent number: 4084396
    Abstract: Individual row units on the harvester, each including a crop transfer trough, cutting apparatus at the forward end of the trough, and cooperating conveyors along the trough, are independently swingable relative to one another for changing the distance between the troughs at their forward ends in accordance with the row spacing encountered in a particular field. The spacing at the rear ends of the troughs remains unchanged in all positions of swinging movement of the units so that the dimensions of the discharge zone into which the crops are delivered by the units may remain constant. Individual sets of disc cutters serve as the cutting apparatus for the row units and are driven by the same mechanism that operates the conveyors.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: April 18, 1978
    Assignee: Hesston Corporation
    Inventors: David P. Fritz, Rex O. Weigand, Gary L. Fleming
  • Patent number: D243948
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: April 5, 1977
    Assignee: Hesston Corporation
    Inventors: Cecil L. Case, David P. Fritz
  • Patent number: RE40611
    Abstract: A harvester which uses a rotary style cutter bed has a series of rotary cutters extending across the path of travel of the machine and rotatable about individual upright axes. Part of the cutter bed is a flat gear case containing a train of intermeshed spur gears that serve to distribute power between the cutters above the gear train. Each end of the gear case has a hollow, gearless extension welded thereto which supports at least one additional outboard cutter that receives its driving power exteriorally of the gear case. One embodiment uses a mechanical drive to bring power to the upright shaft of the cutter having the first spur gear so that the cutters with gears receive all their power from the driven cutter.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: December 30, 2008
    Assignee: AGCO Corporation
    Inventors: Michael L. O'Halloran, Cecil L. Case, Martin E. Pruitt, David P. Fritz