Jon L Howell

US Patent:

8622665, Jan 7, 2014

Filed:

Feb 10, 2011

Appl. No.:

13/024884

Inventors:

Javier Ibarra - Schaumburg IL, US
Patrick McAuliffe - Chicago IL, US
Wade Nachtigall - Chicago IL, US
Christoph Flury - Solothurn, CH
Jon Howell - Agoura Hills CA, US

Assignee:

Robert Bosch GmbH - Stuttgart

International Classification:

B23B 51/05

US Classification:

408206

Abstract:

A rotary tool accessory in one embodiment includes a base, a circular wall extending upwardly from the base about a central axis, the circular wall including an inner face, an outer face and a circular rim, a first cutting group including a first inwardly extending tooth extending from a location directly above the circular wall to a location closer to the central axis than the inner face, a first outwardly extending tooth extending from a location directly above the circular wall to a location farther from the central axis than the outer face, and a first gullet extending downwardly from the rim toward the base, a second cutting group including a second inwardly extending tooth, a second outwardly extending tooth, and a second gullet, and a toothless expanse of the rim extending between the first cutting group and the second cutting group.