Patents by Inventor Duane Harthoorn

Duane Harthoorn 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).

  • Publication number: 20220355397
    Abstract: A rotatable cutter wheel of a material reduction machine, the cutter wheel including a drive plate configured to be mounted on the material reduction machine for rotation in a forward rotation direction about a central axis. The drive plate includes a central driveshaft aperture and an outer peripheral edge. A wear plate is positioned along a first axial side of the drive plate and removably coupled to the drive plate. A cutter is removably coupled for rotation with the drive plate via a fastener. A wear insert is positioned to cover a portion of the outer peripheral edge of the drive plate, the wear insert being mounted to the wear plate and held in spaced relation to the outer peripheral edge of the drive plate.
    Type: Application
    Filed: April 13, 2022
    Publication date: November 10, 2022
    Inventors: Joshua Nossaman, Claudio Verzilli, Duane Harthoorn, Daniel Roorda
  • Patent number: 10086382
    Abstract: The present disclosure relates to a material reducing apparatus adapted to be coupled to a vehicle by a pivot arm or other structure. The material reducing apparatus includes a reducing head with rotary reducing component. The reducing head can be titled about a tilt axis relative to the vehicle and can be raised and lowered relative to a vehicle. The reducing head has a thrown object deflector that automatically moves relative to the rotary reducing component when the reducing head is tilted relative to the vehicle.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: October 2, 2018
    Assignee: Vermeer Manufacturing Company
    Inventors: Duane Harthoorn, Greg Williams, Jim O'Halloran, Jeff Bradley
  • Patent number: 9192964
    Abstract: The present disclosure relates to a material reducing machine including a rotary reducing component positioned at least partially within a reducing chamber. A sizing screen defines a portion of the reducing chamber and extends at least partially around the rotary reducing component. Material catches are disclosed for preventing elongated strips of material from snaking longitudinally through the sizing screen without being adequately reduced in length.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: November 24, 2015
    Assignee: Vermeer Manufacturing Company
    Inventors: Daniel James Vroom, Duane Harthoorn
  • Publication number: 20150251187
    Abstract: The present disclosure relates to a material reducing apparatus adapted to be coupled to a vehicle by a pivot arm or other structure. The material reducing apparatus includes a reducing head with rotary reducing component. The reducing head can be titled about a tilt axis relative to the vehicle and can be raised and lowered relative to a vehicle. The reducing head has a thrown object deflector that automatically moves relative to the rotary reducing component when the reducing head is tilted relative to the vehicle.
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Inventors: Duane Harthoorn, Greg Williams, Jim O'Halloran, Jeff Bradley
  • Publication number: 20130098811
    Abstract: The present disclosure relates to a material reducing machine including a rotary reducing component positioned at least partially within a reducing chamber. A sizing screen defines a portion of the reducing chamber and extends at least partially around the rotary reducing component. Material catches are disclosed for preventing elongated strips of material from snaking longitudinally through the sizing screen without being adequately reduced in length.
    Type: Application
    Filed: August 21, 2012
    Publication date: April 25, 2013
    Applicant: Vermeer Manufacturing Company
    Inventors: Daniel James Vroom, Duane Harthoorn
  • Patent number: 8245961
    Abstract: The present disclosure relates to a material reducing machine including a rotary reducing component positioned at least partially within a reducing chamber. A sizing screen defines a portion of the reducing chamber and extends at least partially around the rotary reducing component. Material catches are disclosed for preventing elongated strips of material from snaking longitudinally through the sizing screen without being adequately reduced in length.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: August 21, 2012
    Assignee: Vermeer Manufacturing Company
    Inventors: Daniel James Vroom, Duane Harthoorn
  • Patent number: 8104701
    Abstract: A grinding machine having a mounting arrangement and an anvil. The grinding machine generally including a feed table and a grinding drum positioned within a mill box. The mounting arrangement being configured to support an end of the feed table and the anvil. The anvil including a wedge-shaped portion and having a length. The length of the anvil being configured to extend beyond sides of the mill box.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: January 31, 2012
    Assignee: Vermeer Manufacturing Company
    Inventors: Brian Smidt, Darin Dux, Scott Eberts, Duane Harthoorn
  • Patent number: 7971818
    Abstract: A grinding machine having an improved anvil mounting arrangement is provided. The mounting arrangement according to the present disclosure is configured to securely support an end of the feed table and an anvil, and also enables easy replacement of the anvil.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: July 5, 2011
    Assignee: Vermeer Manufacturing Company
    Inventors: Brian Smidt, Darin Dux, Scott Eberts, Duane Harthoorn
  • Publication number: 20100308144
    Abstract: The present disclosure relates to a material reducing machine including a rotary reducing component positioned at least partially within a reducing chamber. A sizing screen defines a portion of the reducing chamber and extends at least partially around the rotary reducing component. Material catches are disclosed for preventing elongated strips of material from snaking longitudinally through the sizing screen without being adequately reduced in length.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 9, 2010
    Inventors: Daniel James Vroom, Duane Harthoorn
  • Publication number: 20090242677
    Abstract: A grinding machine having an improved anvil mounting arrangement is provided. The mounting arrangement according to the present disclosure is configured to securely support an end of the feed table and an anvil, and also enables easy replacement of the anvil.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 1, 2009
    Inventors: Brian Smidt, Darin Dux, Scott Eberts, Duane Harthoorn
  • Publication number: 20090072062
    Abstract: A grinding machine having a mounting arrangement and an anvil. The grinding machine generally including a feed table and a grinding drum positioned within a mill box. The mounting arrangement being configured to support an end of the feed table and the anvil. The anvil including a wedge-shaped portion and having a length. The length of the anvil being configured to extend beyond sides of the mill box.
    Type: Application
    Filed: November 19, 2008
    Publication date: March 19, 2009
    Applicant: Vermeer Manufacturing Company
    Inventors: Brian Smidt, Darin Dux, Scott Eberts, Duane Harthoorn
  • Patent number: 7461802
    Abstract: A grinding machine having a mounting arrangement and an anvil. The grinding machine generally including a feed table and a grinding drum positioned within a mill box. The mounting arrangement being configured to support an end of the feed table and the anvil. The anvil including a wedge-shaped portion and having a length. The length of the anvil being configured to extend beyond sides of the mill box.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 9, 2008
    Assignee: Vermeer Manufacturing Company
    Inventors: Brian Smidt, Darin Dux, Scott Eberts, Duane Harthoorn
  • Patent number: 7441719
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: October 28, 2008
    Assignee: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • Publication number: 20060027690
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Application
    Filed: October 4, 2005
    Publication date: February 9, 2006
    Applicant: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick Lucas, Duane Harthoorn
  • Patent number: 6978955
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: December 27, 2005
    Assignee: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • Publication number: 20050184178
    Abstract: A grinding machine having a mounting arrangement and an anvil. The grinding machine generally including a feed table and a grinding drum positioned within a mill box. The mounting arrangement being configured to support an end of the feed table and the anvil. The anvil including a wedge-shaped portion and having a length. The length of the anvil being configured to extend beyond sides of the mill box.
    Type: Application
    Filed: February 20, 2004
    Publication date: August 25, 2005
    Inventors: Brian Smidt, Darin Dux, Scott Eberts, Duane Harthoorn
  • Publication number: 20050098671
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Application
    Filed: December 17, 2004
    Publication date: May 12, 2005
    Applicant: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick Lucas, Duane Harthoorn
  • Patent number: 6843435
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: January 18, 2005
    Assignee: Vermeer Manufacturing Company
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • Publication number: 20040251346
    Abstract: A grinder having a grinding structure and a sizing screen is disclosed herein. A top cover covers the grinding structure. The sizing screen can be removed from the grinder by opening the cover, and lifting the sizing screen through the opening left by the cover.
    Type: Application
    Filed: November 18, 2002
    Publication date: December 16, 2004
    Inventors: Gary Verhoef, Frederick H. Lucas, Duane A. Harthoorn
  • Patent number: D452294
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: December 18, 2001
    Inventors: Duane A. Harthoorn, Fred H. Lucas