Patent ID: 11897110
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 17:
18. A rotary power tool comprising:
a housing including a motor housing portion and a handle portion extending therefrom;
an electric motor positioned within the motor housing portion, the electric motor defining a longitudinal axis extending through the motor housing portion;
a trigger switch configured to activate and deactivate the motor;
a bit retainer operatively coupled to the electric motor;
a circuit board positioned in the motor housing portion, the circuit board positioned axially between the electric motor and the bit retainer relative to the longitudinal axis, the circuit board oriented perpendicular to the longitudinal axis;
a non-contact speed selector switch positioned in the motor housing portion, the non-contact speed selector switch configured to adjust a rotational speed of the motor, and wherein the circuit board includes a portion of the non-contact speed selector switch; and
a multi-stage planetary transmission coupled to the motor, wherein the non-contact speed selector switch includes an adjustable mechanical switch portion for adjusting the transmission,
wherein the non-contact speed selector switch is configured to indicate to an electronic controller a speed setting of the transmission,
wherein the non-contact speed selector switch includes a Hall-effect sensor and a magnet,
wherein the magnet is positioned on the mechanical switch portion,
wherein the circuit board is spaced from the magnet,
wherein the circuit board includes an axially-facing surface relative to the longitudinal axis, and
wherein the Hall-effect sensor is positioned on the axially-facing surface of the circuit board.