Patents by Inventor Dwight L. Green

Dwight L. Green 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).

  • Handheld cordless hair dryer
    Patent number: 4903416
    Abstract: A handheld cordless hair dryer utilizes a battery powered fan for directing a flow of air through a nozzle body portion within which a heat exchanger is disposed in heat exchange relationship with respect to both the airflow and heat generated by a gas combustion device. To provide a highly efficient transference of heat from the gas combustion device to the airflow, while avoiding high temperature conditions in exhaust gases discharged or at the peripheral wall of the nozzle body portion, the heat exchanger is comprised of a heat conductive inner duct and an outer duct between which conductive vanes extend, the outer duct being in spaced relationship with respect to an inner surface of the peripheral wall of the nozzle body portion and the inner duct serving as both a combustion tube and an exhaust duct for the gas combustion device.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: February 27, 1990
    Inventors: Mark R. Levin, William M. Nalley, Dwight L. Green
  • Handheld cordless hair dryer
    Patent number: 4800654
    Abstract: A handheld cordless hair dryer utilizes a battery powered fan for directing a flow of air through a nozzle body portion within which a heat exchanger is disposed in heat exchange relationship with respect to both the airflow and heat generated by a gas combustion device. To provide a highly efficient transference of heat from the gas combustion device to the airflow, while avoiding high temperature conditions in exhaust gases discharged or at the peripheral wall of the nozzle body portion, the heat exchanger is comprised of a heat conductive inner duct and an outer duct between which conductive vanes extend, the outer duct being in spaced relationship with respect to an inner surface of the peripheral wall of the nozzle body portion and the inner duct serving as both a combustion tube and an exhaust duct for the gas combustion device.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: January 31, 1989
    Assignee: Mark R. Levin
    Inventors: Mark R. Levin, William M. Nalley, Dwight L. Green