Patents by Inventor Ehrich J. Bräunschweig

Ehrich J. Bräunschweig 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 collection device for sanding tool
    Patent number: 8070862
    Abstract: A dust collection device for a sanding tool comprising a bag having a sidewall and a coupler attached to the bag. The sidewall comprising a first filter layer, a second filter layer, and an outer support layer. The first filter layer comprising a plurality of fibrillated electrostatically charged electret fibers forming a nonwoven web; the first filter layer having a total pressure drop between about 0.1 to about 4.0 mm H2O, and the first filter layer having a total basis weight between about 50 to about 450 gram/m2. The second filter layer comprising a melt blown microfiber nonwoven web; the second filter layer having a total pressure drop between about between about 5.5 to about 20.0 mm H2O, and the second filter layer having a total basis weight between about 15 to about 75 grams/m2.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: December 6, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Edward J. Woo, Seyed A. Angadjivand, Rufus C. Sanders, Jr., Edward L. Manor, Robert A. Harkins, Ehrich J. Bräunschweig, Joseph B. Eckel, Timothy J. Rowell