Patents by Inventor Richard A. Hallet

Richard A. Hallet 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).

  • Disc filter assembly for machine tool coolant
    Patent number: 5820756
    Abstract: Filter apparatus for filtering contaminants from a fluid, such as machine tool coolant, are disclosed. One filter apparatus includes a filter drum unit having a generally cylindrical open perforated support sheet with a cylindrical screen element mounted thereabout. Circumference varying mechanisms, such as turnbuckles, are connected relative to the support plate to vary the circumference of the support plate and the tautness of the screen element. A disc filter assembly having a mandrel and fluidly attached annular disc filter elements is also described. Each annular disc filter element has an inner structure with concentric ribs forming concentric grooves therebetween which are connected to radially extending grooves. A screen element is supported by the ribs so that the microscreen will not tear while allowing filtering of fluid into the grooves which are in fluid communication with the mandrel.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: October 13, 1998
    Inventors: Stephen N. McEwen, Jay M. Creps, Scott M. McEwen, Richard A. Hallet, Robert F. Benschoter, Barry Benschoter
  • Immersible filter drum unit and method for assembling thereof
    Patent number: 5637213
    Abstract: Filter apparatus for filtering contaminants from a fluid, such as machine tool coolant, are disclosed. One filter apparatus includes a filter drum unit having a generally cylindrical open perforated support sheet with a cylindrical screen element mounted thereabout. Circumference varying mechanisms, such as turnbuckles, are connected relative to the support plate to vary the circumference of the support plate and the tautness of the screen element. A disc filter assembly having a mandrel and fluidly attached annular disc filter elements is also described. Each annular disc filter element has an inner structure with concentric ribs forming concentric grooves therebetween which are connected to radially extending grooves. A screen element is supported by the ribs so that the microscreen will not tear while allowing filtering of fluid into the grooves which are in fluid communication with the mandrel.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: June 10, 1997
    Assignee: Henry Filters, Inc.
    Inventors: Stephen N. McEwen, Jay M. Creps, Scott M. McEwen, Richard A. Hallet, Robert F. Benschoter, Barry Benschoter