Robert Boschgmbh

Robert Bosch Tool Corporation

Javier Ibarra Sandoval

Hagen Walter Dost

Patrick Michael McAuliffe

Kenneth C Osberg

Creighton Wade Nachtigall

A spade bit includes a shaft defining an axis about which the spade bit is configured to be rotated. The space bit also includes a blade attached to the shaft and having a first paddle portion and a second paddle portion. In addition, the spade bit includes a tip portion attached to the blade and aligned with the axis. The first paddle portion includes (i) a first leading end portion positioned on a first side of the axis and configured to define a first cutting edge portion, and (ii) a first lateral extension portion configured to define a first sloping surface. The first paddle portion defines a first relief space positioned adjacent to both the first sloping portion and the first leading end portion. The second paddle portion includes (i) a second leading end portion positioned on an opposite second side of the axis and configured to define a second cutting edge portion, and (ii) a second lateral extension portion configured to define a second sloping surface. The second paddle portion defines a second relief space positioned adjacent to both the second sloping portion and the second leading end portion.

Spade bit having reamer feature

A bit including a shaft defining an axis about which the bit is configured to be rotated. The bit further includes a blade having a first end attached to the shaft and an opposite second end, the blade further having (i) a first blade portion including a first shoulder defining a first cutting edge portion at the second end of the blade, and (ii) a second blade portion including a second shoulder defining a second cutting edge portion at the second end of the blade. The bit additionally includes a frusto-conically-shaped tip portion having an apex and being attached to the second end of the blade. The frusto-conically-shaped tip portion includes threads extending from the apex to a location adjacent to the first cutting edge portion and the second cutting edge portion.

Spade bit having threaded conical tip portion

A spade bit includes a shaft defining an axis, and a blade attached to the shaft and having a first blade portion and a second blade portion. The first blade portion defines a first leading face portion, and the second blade portion defines a second leading face portion. The first blade portion defines a first cutting edge portion, and the second blade portion defines a second cutting edge portion. The first cutting edge portion lies on a first border portion of the first leading face portion, and the second cutting edge portion lies on a second border portion of the second leading face portion. The first cutting edge portion and the second cutting edge portion both lie in a plane P. An area Ais bound by the plane Pand the first leading face portion when the first blade portion is viewed in a first cross section taken along a plane Pwhich is parallel to and spaced apart from the axis by a distance D, and the area Aincreases as the distance Dincreases. The area Ais bound by the plane Pand the second leading face portion when the second blade portion is viewed in a second cross section taken along a plane Pwhich is parallel to and spaced apart from the axis by a distance D, and the area Aincreases as the distance Dincreases.

Growing community of inventors

Schaumburg, IL, United States of America

Javier Ibarra Sandoval