Patents by Inventor Harlin Trefz

Harlin Trefz 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: 9560800
    Abstract: A quick change rotary mower blade assembly includes a mower blade attached to a blade assembly pin that is inserted into an internal bore in a spindle extending through a housing under the mower deck. A blade retainer on the lower end of the spindle has a pair of notches holding and locking the mower blade in place.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: February 7, 2017
    Assignee: DEERE & COMPANY
    Inventors: Ronald L. Reichen, Harlin Trefz
  • Publication number: 20150289447
    Abstract: A quick change rotary mower blade assembly includes a mower blade attached to a blade assembly pin that is inserted into an internal bore in a spindle extending through a housing under the mower deck. A blade retainer on the lower end of the spindle has a pair of notches holding and locking the mower blade in place.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 15, 2015
    Applicant: DEERE & COMPANY
    Inventors: Ronald L. REICHEN, Harlin TREFZ
  • Publication number: 20070256400
    Abstract: An electric implement lift system for mower cutting units may include an electric motor having a rotatable output shaft with a pivot bracket mounted thereto, a lift link or a pair of lift links, each lift link having a first end connected to the pivot bracket and a second end connected to a lift arm, the output shaft rotatable in a first direction to raise the mower cutting unit and in a second direction to lower the mower cutting unit. The output shaft may be rotatable in the first direction to move the cutting unit to a top/center position and rotatable further in the first direction to move the cutting unit to a raised/transport position.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 8, 2007
    Inventors: Robert Henson, Harlin Trefz, Thomas Bartlett
  • Publication number: 20070074496
    Abstract: Transport brackets are welded onto the top surface of the mower deck, each transport bracket having vertical plates with holes extending transversely through the plates. Pins extend through at least one hole in the plates and are secured to a rear mounted hitch of a tractor. The mower deck may be lifted and transported in a raised position behind the tractor, and also may be pivoted to a position for servicing.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 5, 2007
    Inventors: John Sundberg, Christopher Thorman, Robert Fox, Harlin Trefz
  • Publication number: 20070028577
    Abstract: A drive over mower deck has a top surface with downwardly depending surfaces defining a front edge, a back edge, and left and right side edges, at least one belt shield over the top surface, a first pair of gauge wheels mounted adjacent the front edge the deck, and a second pair of gauge wheels mounted adjacent the back edge of the deck. Each pair of gauge wheels is movable vertically to at least one position above the ground surface such that the mower deck is supported by the front edge, back edge, and left and right side edge. Each gauge wheel being releasably lockable at a plurality of different positions.
    Type: Application
    Filed: July 21, 2005
    Publication date: February 8, 2007
    Inventors: Brian Clement, Thomas Deves, Robert Fox, Harlin Trefz
  • Publication number: 20060096264
    Abstract: A reverse implement option for a tractor or mowing vehicle is activated by moving the reverse foot pedal to an intermediate position. An arm linked to the reverse foot pedal pivots in response to movement of the reverse foot pedal to the intermediate position to actuate a reverse sensing switch. The reverse sensing switch is actuated before a transmission control rod, which links the reverse foot pedal to a hydrostatic transmission swash plate, enables reverse travel of the tractor or vehicle. The PTO operates during reverse travel of the tractor if both the hand operated bypass switch and the reverse sensing switch are actuated.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 11, 2006
    Inventor: Harlin Trefz
  • Publication number: 20060055140
    Abstract: A quick attaching coupler is mounted to a tractor three point hitch, with a first actuator linked to latches on both sides of the hitch. The first actuator may be moved by a seated operator between a first position wherein both latches are unlatched and a second position wherein both latches are latched. A quick PTO coupler is mounted to the quick attaching coupler, and has a sleeve carrying a first end of a tractor PTO shaft. The sleeve pivots independently of the latches between a first PTO disengaged position and a second PTO engaged position. A second actuator linked to the sleeve may be moved by the seated operator between a first position wherein the PTO is disengaged and a second position wherein the PTO is engaged.
    Type: Application
    Filed: September 15, 2004
    Publication date: March 16, 2006
    Inventors: Harlin Trefz, David Ross, Brian Clement, Kenneth Hunt