Patents by Inventor Nathan Ulrich

Nathan Ulrich 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).

  • Power assist vehicle
    Patent number: 6807465
    Abstract: A power-assist vehicle such as a wheelchair senses driving torque/force applied by a user through a transmission. The detected force/torque is utilized in a control system with a control map defining a desired dynamic of the vehicle and programmed with the desired mass and drag parameter.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: October 19, 2004
    Inventors: Nathan Ulrich, Dana R. Yoerger
  • Power assist vehicle
    Publication number: 20030018417
    Abstract: A power-assist vehicle such as a wheelchair senses driving torque/force applied by a user through a transmission. The detected force/torque is utilized in a control system with a control map defining a desired dynamic of the vehicle and programmed with the desired mass and drag parameter.
    Type: Application
    Filed: September 24, 2002
    Publication date: January 23, 2003
    Inventors: Nathan Ulrich, Dana R. Yoerger
  • Power assist vehicle
    Patent number: 6459962
    Abstract: A power-assist vehicle such as a wheelchair senses driving torque/force applied by a user through a transmission. The detected force/torque is utilized in a control system with a control map defining a desired dynamic of the vehicle and programmed with the desired mass and drag parameter.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: October 1, 2002
    Assignee: DeltaGlide, Inc.
    Inventors: Nathan Ulrich, Dana R. Yoerger
  • Power assist vehicle
    Publication number: 20020019686
    Abstract: A power-assist vehicle such as a wheelchair senses driving torque/force applied by a user through a transmission. The detected force/torque is utilized in a control system with a control map defining a desired dynamic of the vehicle and programmed with the desired mass and drag parameter.
    Type: Application
    Filed: June 21, 2001
    Publication date: February 14, 2002
    Inventors: Nathan Ulrich, Dana R. Yoerger
  • Exercise apparatus
    Patent number: 5755645
    Abstract: A passive exercise apparatus includes an interface member for coupling to a user's limb. An arm member is coupled to the interface member by a wrist joint. The wrist joint has rotational motion about three axes. A first link is coupled to the arm member by a sliding joint. The sliding joint allows translational motion of the arm member relative to the first link. A second link is rotatably coupled to the first link by a first rotary joint. A third link is rotatably coupled to the second link by a second rotary joint. A first brake is coupled to the first rotary joint for resisting movement of the first rotary joint. A second brake is coupled to the second rotary joint for resisting movement of the second rotary joint. A third brake is coupled to the arm member for resisting movement of the arm member. The user is capable of interfacing with the apparatus to exercise a six degree of freedom motion.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: May 26, 1998
    Assignee: Boston Biomotion, Inc.
    Inventors: Larry C. Miller, Nathan Ulrich, William T. Townsend, Dana Yoerger, Yoky Matsuoka, Brandon D. Larocque
  • Robotic wrist
    Patent number: D352050
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: November 1, 1994
    Assignee: Barrett Technology Inc.
    Inventors: Nathan Ulrich, William T. Townsend