Patents by Inventor Andrew F. Groh

Andrew F. Groh 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).

  • Compact dust filter system
    Patent number: 4007026
    Abstract: An industrial sweeper has a filter unit in the debris hopper with the filter unit comprising rows of cartridges having pleated paper filter elements that are cyclically cleaned by reverse jet pulses of air without interrupting the filtering action by the main blower.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: February 8, 1977
    Assignee: FMC Corporation
    Inventor: Andrew F. Groh