Patents by Inventor Charles A. Krajewski

Charles A. Krajewski 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).

  • Method and apparatus for calibrating personal air samplers
    Patent number: 6363769
    Abstract: A method for calibrating a personal air sampler. A desired flow rate is set, the actual rate measured and recorded through a plurality of runs, the results are automatically averaged and compared to the desired flow and the pump is automatically adjusted accordingly. The process may be repeated for a plurality of selected flow rates, and a best-fit curve computed to cover the entire range. Stability is tested by a series of sets of runs to determine erratic behavior, and an overall calibration is conducted by performing such a series of runs at each of several set point flows.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: April 2, 2002
    Assignee: SKC, Inc.
    Inventors: Charles A. Krajewski, Peter M. Hall
  • Method and apparatus for calibrating personal air samplers
    Publication number: 20010004842
    Abstract: A method for calibrating a personal air sampler. A desired flow rate is set, the actual rate measured and recorded through a plurality of runs, the results are automatically averaged and compared to the desired flow and the pump is automatically adjusted accordingly. The process may be repeated for a plurality of selected flow rates, and a best-fit curve computed to cover the entire range. Stability is tested by a series of sets of runs to determine erratic behavior, and an overall calibration is conducted by performing such a series of runs at each of several set point flows.
    Type: Application
    Filed: January 9, 2001
    Publication date: June 28, 2001
    Inventors: Charles A. Krajewski, Peter M. Hall
  • Method and apparatus for calibrating gas samplers
    Patent number: 6227031
    Abstract: A method for calibrating a personal air sampler. A desired flow rate is set, the actual rate measured and recorded through a plurality of runs, the results are automatically averaged and compared to the desired flow and the pump is automatically adjusted accordingly. The process may be repeated for a plurality of selected flow rates, and a best-fit curve computed to cover the entire range. Stability is tested by a series of sets of runs to determine erratic behavior, and an overall calibration is conducted by performing such a series of runs at each of several set point flows.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: May 8, 2001
    Assignee: SKC, Inc.
    Inventors: Charles A. Krajewski, Peter M. Hall