Patents by Inventor Michael G. Lehti

Michael G. Lehti 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).

  • Combined air cleaner-resonator
    Patent number: 5865863
    Abstract: A combined air cleaner and noise attenuating resonator device including a hollow cylindrical air cleaner element pressed to a fitting on a hose, the fitting latched to the housing in a position holding the air cleaner filter element within a cavity in a housing. An expansion chamber and a Helmholtz resonator chamber are both defined in part in the housing and by an insert piece within the housing which also forms an air flow passage in fluid communication with each chamber.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: February 2, 1999
    Assignee: Siemens Electric Limited
    Inventors: Joseph DeSousa, Michael G. Lehti