Patents by Inventor Stewart W. Vreeland

Stewart W. Vreeland 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).

  • Battery charger
    Patent number: 4607208
    Abstract: A battery charger analyzer utilizing a down pulse configuration employs a mber of power switching transistors driven from a pulse-width modulator in a control section which monitors and analyzes the battery temperature, charge condition, current provided, and length of time in the charge cycle, all of which affect the operation of the pulsewidth modulator and thereby the charge supplied to the battery. The charger analyzer supplies 95% of the battery charge at either of two selected charging rates.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: August 19, 1986
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Stewart W. Vreeland