Patents by Inventor Walter Krachler

Walter Krachler 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).

  • Measuring apparatus for the determination of the particulates content of exhaust gases
    Patent number: 4406155
    Abstract: The particulates content of exhaust gases is determined by a sampling device connected to the exhaust supply line. The particulates in the exhaust gases are deposited onto a gas-permeable filter material and the particulates determined by light reflected from the filter material. A constant differential exhaust gas pressure is maintained and a predetermined sample volume per time unit is metered to the filter material. The total cross-section of the exhaust-gas flow through the measuring device is maintained constant. The sampling is taken in short consecutive intervals at a rate such that the characteristics of dynamic changes in the particulates content of the exhaust gas can be determined.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: September 27, 1983
    Assignee: Hans List
    Inventors: Walter Krachler, Bruno Schachner