Patents by Inventor Richard Kent Frantz

Richard Kent Frantz 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).

  • Oxygen concentrator with beds' duty cycle control and self-test
    Patent number: 5858063
    Abstract: A method of controlling an oxygen concentrator having a first sieve bed operated over successive control periods according to a duty cycle for alternately pressurizing and flushing the first sieve bed and a second sieve bed operated over the successive control periods according to a reciprocal of the duty cycle is disclosed. The duty cycle and the reciprocal duty cycle are adjusted during every second one of the successive control periods to change the pressurizing relative to the flushing of the first sieve bed and to change the flushing relative to the pressurizing of the second sieve bed, for reducing concentration of oxygen produced. The duty cycle and the reciprocal duty cycle are adjusted during remaining control periods to change the flushing relative to the pressurizing of the first sieve bed and to change the pressurizing relative to the flushing of the second sieve bed, such that water vapor is purged from the first and second sieve beds after pressurizing thereof.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: January 12, 1999
    Assignee: Litton Systems, Inc.
    Inventors: Tuan Quoc Cao, Russell Frank Hart, William David Molis, Richard Kent Frantz, Charles Bradley Hager, Victor Paul Crome