Patents by Inventor Robert Samuel George Sparke

Robert Samuel George Sparke 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).

  • Respirator exhalation unit
    Patent number: 7866319
    Abstract: A respirator exhalation unit (10) comprises a negative pressure valve (120) and a selectively actuable positive pressure valve assembly (130). The position of the positive pressure valve assembly (130) is selectively adjustable to convert the exhalation unit (10) for use in multiple operating modes, such as a negative pressure mode, a powered air mode, and a self-contained breathing apparatus mode (SCBA). Additionally, a closed circuit breathing apparatus (CCBA) adapter assembly (200) can be attached to the exhalation unit for conversion to a CCBA operating mode. Further, the negative pressure valve (120) divides the interior of the exhalation unit into two chambers, one of which functions as a dead space that protects the user from exposure to any harmful contaminants at the end of exhalation.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: January 11, 2011
    Assignee: Avon Protection Systems, Inc.
    Inventors: John R. Penton, John M. Richards, Robert Samuel George Sparke
  • Respirator Exhalation Unit
    Publication number: 20080257352
    Abstract: A respirator exhalation unit (10) comprises a negative pressure valve (120) and a selectively actuable positive pressure valve assembly (130). The position of the positive pressure valve assembly (130) is selectively adjustable to convert the exhalation unit (10) for use in multiple operating modes, such as a negative pressure mode, a powered air mode, and a self-contained breathing apparatus mode (SCBA). Additionally, a closed circuit breathing apparatus (CCBA) adapter assembly (200) can be attached to the exhalation unit for conversion to a CCBA operating mode. Further, the negative pressure valve (120) divides the interior of the exhalation unit into two chambers, one of which functions as a dead space that protects the user from exposure to any harmful contaminants at the end of exhalation.
    Type: Application
    Filed: September 26, 2005
    Publication date: October 23, 2008
    Applicant: AVON P0ROTECTION SYSTEMS, INC.
    Inventors: John R. Penton, John M. Richards, Robert Samuel George Sparke