Patents by Inventor Douglas Ray Treffer

Douglas Ray Treffer 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: 9648809
    Abstract: A pull-type mower conditioner includes a crop cutting assembly that severs crop material from the ground and a lift mechanism configured to raise and lower the crop cutting assembly to a desired height having at least one lift cylinder and a hydraulic lift circuit supplying hydraulic fluid to the at least one lift cylinder. The mower conditioner also includes a conditioning mechanism receiving the severed crop material from the crop cutting assembly. The conditioning mechanism includes a pair of counter-rotating conditioning rolls to condition the crop material and a tensioning assembly that urges the conditioning rolls relatively toward one another and resists their separation. The tensioning assembly includes a pair of hydraulic tension cylinders and a hydraulic conditioner circuit configured to supply hydraulic fluid to the tension cylinders. The hydraulic tension circuit has a supply line leading to a supply valve, wherein the supply line connects to the lift circuit.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: May 16, 2017
    Assignee: AGCO Corporation
    Inventors: Martin E. Pruitt, Douglas Ray Treffer, Shane A. Bollinger
  • Publication number: 20170079209
    Abstract: A pull-type mower conditioner includes a crop cutting assembly that severs crop material from the ground and a lift mechanism configured to raise and lower the crop cutting assembly to a desired height having at least one lift cylinder and a hydraulic lift circuit supplying hydraulic fluid to the at least one lift cylinder. The mower conditioner also includes a conditioning mechanism receiving the severed crop material from the crop cutting assembly. The conditioning mechanism includes a pair of counter-rotating conditioning rolls to condition the crop material and a tensioning assembly that urges the conditioning rolls relatively toward one another and resists their separation. The tensioning assembly includes a pair of hydraulic tension cylinders and a hydraulic conditioner circuit configured to supply hydraulic fluid to the tension cylinders. The hydraulic tension circuit has a supply line leading to a supply valve, wherein the supply line connects to the lift circuit.
    Type: Application
    Filed: May 11, 2015
    Publication date: March 23, 2017
    Inventors: Martin E. PRUITT, Douglas Ray Treffer, Shane A. Bollinger