Patents by Inventor Donovan Evenstad

Donovan Evenstad 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).

  • Dust collector and filter bags therefor
    Patent number: 4336035
    Abstract: A multiple filter bag assembly wherein top access is had for removal and replacement of the filter bags through openings in the cell plate subdividing the filter housing into an upper clean gas plenum chamber and a lower baghouse, wherein use is made of tapered filter bags and a cage for easing the passage of the filter bags through the openings in the cell plate during installation and removal.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: June 22, 1982
    Assignee: Wheelabrator-Frye Inc.
    Inventors: Donovan Evenstad, Cecil Lander