Rotary power tool including threaded bit attachment
AssigneeMilwaukee Electric Tool Corporation
InventorsMitchell Carlson, Terry L. Timmons
Life of this patent
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Abstract
A rotary power tool comprises a drive mechanism, a spindle rotatable about a rotational axis in response to receiving torque from the drive mechanism, and a first shank coupled for co-rotation with the spindle and having a first diameter. The first shank includes a first threaded portion upon which a first tool bit is receivable. A second shank is coupled for co-rotation with the spindle and extends outwardly from and coaxial with the first shank. The second shank has a second diameter that is smaller than the first diameter and a second threaded portion upon which a second tool bit is receivable.
Claims20
A rotary power tool comprising:
- a drive mechanism;
- a spindle rotatable about a rotational axis in response to receiving torque from the drive mechanism, the spindle including
- a first shoulder,
- a first shank located adjacent and extending outwardly from and coaxial with the first shoulder, the first shank having a first diameter and a first threaded portion upon which a first tool bit is receivable,
- a second shank extending outwardly from and coaxial with the first shank, the first shoulder and the second shank being positioned on opposite sides of the first shank, the second shank having a second diameter that is smaller than the first diameter and a second threaded portion upon which a second tool bit is receivable, the first and second tool bits being used separately for different operations;
- and
- a first collar arranged about the first shank and the first shoulder,
- wherein one of a first notch or a first protrusion is defined on the first shoulder, and wherein the first collar includes the other of the first notch or the first protrusion,
- wherein the first collar is rotatable and axially displaceable relative to the first shoulder and the first shank when removing the first tool bit.
A rotary power tool comprising:
- a drive mechanism;
- a spindle rotatable about a rotational axis in response to receiving torque from the drive mechanism, the spindle including
- a first shank having a first diameter, the first shank including a first threaded portion upon which a first tool bit is receivable,
- a second shank extending outwardly from and coaxial with the first shank, the second shank having a second diameter that is smaller than the first diameter and a second threaded portion upon which a second tool bit is receivable, the first and second tool bits being used separately for different operations;
- a first quick release mechanism for attaching and removing the first tool bit to the first threaded portion, the first quick release mechanism including a first shoulder adjacent the first shank and a first collar arranged about the first shank and the first shoulder, wherein one of a first notch or a first protrusion is defined on the first shoulder and the other of the first notch or first protrusion is included on the first collar, the first collar being axially displaceable and rotatable relative to the first shoulder and the first shank, the first collar being rotatable to move the first protrusion relative to the first notch;
- and
- a second quick release mechanism for attaching and removing the second tool bit to the second threaded portion, the second quick release mechanism including a second shoulder adjacent the second shank and a second collar arranged about the second shank and the second shoulder, wherein one of a second notch or a second protrusion is defined on the second shoulder and the other of the second notch or second protrusion is included on the second collar, the second collar being rotatable relative to the second shoulder and the second shank, the second collar being rotatable to move the second protrusion relative to the second notch.
Dependencies are inferred from the claim text.