Patents by Inventor Richard N. Knowles

Richard N. Knowles 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: 8776957
    Abstract: A brake retractor assembly (10) for a vehicle, such as an agricultural vehicle, includes a brake housing (12) and a brake cover (14) defining a friction chamber (16). A brake piston (18) is arranged within the friction chamber (16) and coupled to the brake cover (14) by a bolt (44) including a first end (46) coupled to the brake cover (14) and a second end (48) coupled to the brake piston (18). A portion of the second end (48) passes through the brake piston (18) via a bore (64) defined in the brake piston (18) and is fixedly retained to the brake piston (18). An actuation system (24) is coupled to apply an axial force to the brake piston (18). Activation of the actuation system (24) results in axial movement of the brake piston (18) in a first direction (80). Deactivation of the actuation system (24) results in axial movement of the brake piston in a second direction (82). Axial movement of the brake piston (18) in the second direction (82) is limited by the fixed retention of the bolt to the brake piston.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: July 15, 2014
    Assignee: Deere & Company
    Inventor: Richard N. Knowles
  • Publication number: 20120193176
    Abstract: A brake system is provided, the brake system having a brake valve having a first mode and a second mode. A retractor is in fluid communication with the brake valve, and a brake assembly is in fluid communication with the retractor. When the brake valve is in a first mode, the brake assembly engages, and when the brake valve is in a second mode, the brake retractor disengages the brake assembly via a fluid vacuum.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Inventor: Richard N. Knowles
  • Publication number: 20110303035
    Abstract: A final drive for a work machine includes a housing, a pinion gear, a first idler gear, a second idler gear, and a bull gear. The pinion gear is restrained within the housing. The first idler gear and the second idler gears are rotatably connected to the housing and positioned for engagement with the pinion gear. The bull gear is rotatably connected to the housing and positioned for engagement with the first idler gear and the second idler gear. The housing, the pinion gear, the first idler gear, and the second idler gear are configured to permit the pinion gear to float between the first idler gear, and the second idler to provide even sharing of the load from the pinion gear to the first idler gear and the second idler gear.
    Type: Application
    Filed: July 31, 2008
    Publication date: December 15, 2011
    Inventors: James A. Niebergall, Benjamin L. Borgmann, Muthukumar Vallinayagam, Samantha Hanson, Werner Stettler, Richard N. Knowles
  • Publication number: 20110269593
    Abstract: A differential locking device (10) includes a differential (12) having a differential housing (13) coaxial with a pair of axle shafts (30,32). The differential housing (13) includes a pair of side gears (26, 28) splined to the pair of axle shafts (30, 32) and a plurality of pinion gears (22) which engage the side gears (26,28). A locking collar (44) splined to one of the axle shafts (30) is sildable between an unlocked position and a locked position. A hydraulic piston (54) applies pressure to the locking collar (44) to actuate the locking collar (44) to the locked position, wherein teeth (46) on the locking collar (44) engage corresponding teeth (50) on the differential housing (14) thereby fixing the differential housing (14) for rotation with the locking collar (44) and thus the side gears (26,28). The resulting differential locking device is compact and can be engaged or disengaged quickly.
    Type: Application
    Filed: July 7, 2008
    Publication date: November 3, 2011
    Inventors: Richard N. Knowles, Brian D. Durbin, Chad Vandenberg, Duane F. Meyer
  • Publication number: 20110266099
    Abstract: A brake retractor assembly (10) for a vehicle, such as an agricultural vehicle, includes a brake housing (12) and a brake cover (14) defining a friction chamber (16). A brake piston (18) is arranged within the friction chamber (16) and coupled to the brake cover (14) by a bolt (44) including a first end (46) coupled to the brake cover (14) and a second end (48) coupled to the brake piston (18). A portion of the second end (48) passes through the brake piston (18) via a bore (64) defined in the brake piston (18) and is fixedly retained to the brake piston (18). An actuation system (24) is coupled to apply an axial force to the brake piston (18). Activation of the actuation system (24) results in axial movement of the brake piston (18) in a first direction (80). Deactivation of the actuation system (24) results in axial movement of the brake piston in a second direction (82). Axial movement of the brake piston (18) in the second direction (82) is limited by the fixed retention of the bolt to the brake piston.
    Type: Application
    Filed: July 7, 2008
    Publication date: November 3, 2011
    Inventor: Richard N. Knowles, JR.
  • Patent number: 3937696
    Abstract: After an azonitrile is prepared by coupling an aminonitrile in the presence of a hypochlorite, the reaction mixture is acidified to a pH of 4 or less and an alkali metal, alkaline earth metal or quaternary ammonium nitrite, sulfite, bisulfite or thiosulfate, sulfur dioxide, nitrogen oxide, oxalic acid, formaldehyde or hydroxylamine is added as a reducing agent.
    Type: Grant
    Filed: April 2, 1974
    Date of Patent: February 10, 1976
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Richard N. Knowles, Earl P. Moore, Jr.
  • Patent number: D910086
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 9, 2021
    Assignee: DEERE & COMPANY
    Inventors: Eric Keen, Brian Huenink, Richard N. Knowles, Thomas C Boe, Felix Nagelin, Thorsten Hagner, Michael D Kollath, Charles N Warren, Daniel J DeBoer, William Clayton Martin, John W. Krieger, Volker Durre, Sebastian Himpel
  • Patent number: D928203
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: August 17, 2021
    Assignee: DEERE & COMPANY
    Inventors: Brian Huenink, Richard N. Knowles, Jr., Felix Nagelin, John W Krieger, William Clayton Martin, Thomas C Boe
  • Patent number: D928204
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: August 17, 2021
    Assignee: DEERE & COMPANY
    Inventors: Brian Huenink, Richard N. Knowles, Jr., Felix Nagelin, John W. Krieger, William Clayton Martin, Thomas C. Boe
  • Patent number: D928851
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: August 24, 2021
    Assignee: DEERE & COMPANY
    Inventors: Brian Huenink, Felix Nagelin, John W Krieger, Richard N. Knowles, Jr., William Clayton Martin, Thomas C. Boe, Volker Durre