Patents by Inventor John R. Hamann

John R. Hamann 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).

  • Drivetrain control for a motor-assisted vehicle
    Patent number: 10232736
    Abstract: An apparatus for controlling an electric motor in a motor-assisted, pedaled or hand-cranked vehicle includes a processor adapted to calculate a value for the net opposing force acting on the vehicle; a vehicle speed sensor, an accelerometer to measure a component of vehicle acceleration in a direction of travel of the vehicle, an air pressure sensor measuring air pressure in the direction of travel, a sensor that measures the power output of the electric motor, and a power assist processor that calculates an amount of power to be supplied by an electric motor according to measured values for speed, acceleration, air pressure, and power provided by a person riding the vehicle.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: March 19, 2019
    Assignee: Velocomp LLC
    Inventor: John R. Hamann
  • DRIVETRAIN CONTROL FOR A MOTOR-ASSISTED VEHICLE
    Publication number: 20180056812
    Abstract: An apparatus for controlling an electric motor in a motor-assisted, pedaled or hand-cranked vehicle includes a processor adapted to calculate a value for the net opposing force acting on the vehicle; a vehicle speed sensor, an accelerometer to measure a component of vehicle acceleration in a direction of travel of the vehicle, an air pressure sensor measuring air pressure in the direction of travel, a sensor that measures the power output of the electric motor, and a power assist processor that calculates an amount of power to be supplied by an electric motor according to measured values for speed, acceleration, air pressure, and power provided by a person riding the vehicle.
    Type: Application
    Filed: August 24, 2017
    Publication date: March 1, 2018
    Inventor: John R. Hamann
  • Protective circuit for zinc oxide varistors
    Patent number: 4259704
    Abstract: The invention provides an improved circuit for determining rates of rise of energy in metal oxide varistor devices. A high voltage transformer is employed to trigger a protective air gap for bypassing the metal oxide varistor device. One application for the invention is for use within a series capacitor protective circuit.
    Type: Grant
    Filed: April 20, 1979
    Date of Patent: March 31, 1981
    Assignee: General Electric Company
    Inventor: John R. Hamann
  • Protective circuit for zinc oxide varistors
    Patent number: 4174529
    Abstract: The invention provides a circuit for determining excessive energy magnitudes or rates of rise of energy in metal oxide varistor devices. The circuit further provides a series of low voltage control pulses for energizing a high voltage pulse generator. The output of the high voltage pulse generator triggers a protective air gap for bypassing the metal oxide varistor device. One application for the invention is for use within a series capacitor protective circuit.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: November 13, 1979
    Assignee: General Electric Company
    Inventor: John R. Hamann
  • Bicycle computer enclosure
    Patent number: D528451
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: September 19, 2006
    Assignee: Velocomp, LLP
    Inventors: Glen B. Cunningham, John R. Hamann, Jo Anne Lala