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US 10,744,671 B2Granted
Auger
AssigneeMilwaukee Electric Tool Corporation
InventorsMichael J. Zimmermann, Neil A. Lofy
Life of this patent
Estimating the term…
Abstract
An auger includes a body with a first end, a second end opposite the first end, a stem that extends from the first end to the second end and defines an axis of rotation, and a flute helically wrapped around the stem. The auger further includes a shank at the first end of the body configured to be received by a power tool and a cutting head at the second end of the body. The cutting head includes a cutting edge, a spur, and a feed screw with a thread. The thread has a pitch and a nonsymmetrical thread profile. The pitch of the thread is at least 2.5 mm.
Claims25
An auger comprising:
- a body including a first end, a second end opposite the first end, a stem that extends from the first end to the second end and defines an axis of rotation, and a flute helically wrapped around the stem;
- a shank at the first end of the body configured to be received by a power tool;
- and
- a cutting head at the second end of the body, the cutting head including a cutting edge, a spur, and a feed screw with a thread, the thread having a pitch and a nonsymmetrical thread profile;
- wherein the pitch of the thread is at least 2.5 mm;
- and
- wherein the cutting head defines a step at an interface with the body, and wherein the cutting head has a maximum diameter that is greater than a maximum diameter of the body.
4 more elements
An auger comprising:
- a body including a first end, a second end opposite the first end, a stem that extends from the first end to the second end and defines an axis of rotation, and a flute helically wrapped around the stem;
- a shank at the first end of the body configured to be received by a power tool;
- and
- a cutting head at the second end of the body, the cutting head including a cutting edge, a cutting face adjacent the cutting edge, a spur, and a feed screw with a thread, the cutting face including a first surface portion extending from the cutting edge toward the flute and a second surface portion extending from the first surface portion to the flute;
- wherein a secondary angle measured between the second surface portion and a plane defined by the cutting edge and the axis of rotation is greater than a primary angle measured between the first surface portion and the plane,
- wherein the flute has a pitch in a range between 30 mm and 70 mm, and
- wherein the flute has a width measured in a direction parallel to the axis of rotation in a range between 25 mm and 50 mm.
4 more elements
An auger comprising:
- a body including a first end, a second end opposite the first end, a stem that extends from the first end to the second end and defines an axis of rotation, and a flute helically wrapped around the stem;
- a shank at the first end of the body configured to be received by a power tool;
- and
- a cutting head at the second end of the body, the cutting head including a cutting edge formed on an edge of the flute at the second end of the body, a spur extending from the second end of the body on a diametrically opposite side of the axis of rotation from the cutting edge, and a feed screw positioned between the cutting edge and the spur, the feed screw having a base connected to the stem, a tip opposite the base, and a thread, the spur extending from the flute past the base of the feed screw;
- wherein the spur extends axially past the cutting edge a distance equal to half a pitch of the thread of the feed screw;
- and
- wherein the cutting head defines a step at an interface with the body, and wherein the cutting head has a maximum diameter that is greater than a maximum diameter of the body.
4 more elements
An auger comprising:
- a body including a first end, a second end opposite the first end, a stem that extends from the first end to the second end and defines an axis of rotation, and a flute helically wrapped around the stem;
- a shank at the first end of the body configured to be received by a power tool;
- and
- a cutting head at the second end of the body, the cutting head including a cutting edge, a spur, and a feed screw with a thread, the thread having a pitch and a nonsymmetrical thread profile;
- wherein the pitch of the thread is at least 2.5 mm;
- and
- wherein the cutting head includes a cutting face positioned adjacent the cutting edge, wherein the cutting face includes a first surface portion extending from the cutting edge toward the flute and a second surface portion extending from the first surface portion to the flute, and wherein a secondary angle measured between the second surface portion and a plane defined by the cutting edge and the axis of rotation is greater than a primary angle measured between the first surface portion and the plane.
4 more elements
Dependencies are inferred from the claim text.