Patents by Inventor Carl H. Knapke

Carl H. Knapke 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).

  • Capacity modulation for plural compressors
    Patent number: 6672846
    Abstract: A compressor system includes a pair of compressors located in a common shell. A common drive shaft drives both compressors and the drive shaft is powered by a single motor. One or both of the compressors can be equipped with a pulse width modulated capacity control system and a vapor injection system. When one compressor is equipped with these systems, the capacity can be varied between 50% and 110%. When both compressors are equipped with these systems, the capacity can be varied between 0% and 120%.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: January 6, 2004
    Assignee: Copeland Corporation
    Inventors: Rajan Rajendran, John P. Sheridan, Carl H. Knapke
  • Plural compressors
    Publication number: 20020159898
    Abstract: A compressor system includes a pair of compressors located in a common shell. A common drive shaft drives both compressors and the drive shaft is powered by a single motor. One or both of the compressors can be equipped with a pulse width modulated capacity control system and a vapor injection system. When one compressor is equipped with these systems, the capacity can be varied between 50% and 110%. When both compressors are equipped with these systems, the capacity can be varied between 0% and 120%.
    Type: Application
    Filed: April 25, 2001
    Publication date: October 31, 2002
    Inventors: Rajan Rajendran, John P. Sheridan, Carl H. Knapke
  • Capacity modulation for plural compressors
    Patent number: RE41955
    Abstract: A compressor system includes a pair of compressors located in a common shell. A common drive shaft drives both compressors and the drive shaft is powered by a single motor. One or both of the compressors can be equipped with a pulse width modulated capacity control system and a vapor injection system. When one compressor is equipped with these systems, the capacity can be varied between 50% and 110%. When both compressors are equipped with these systems, the capacity can be varied between 0% and 120%.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: November 23, 2010
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Rajan Rajendran, John P. Sheridan, Carl H. Knapke