Powered threaded rod cutter
AssigneeMilwaukee Electric Tool Corporation
InventorsSimon M. Gall, Terry L. Timmons
Life of this patent
Estimating the term…
Abstract
A powered threaded rod cutter includes first and second cutting dies, an electric motor, a planetary transmission positioned downstream of the motor, a drivetrain for converting a rotational output of the transmission to a pivoting movement of the first cutting die, and a clutch mechanism for redirecting torque from the motor away from a drivetrain and the first cutting die in response to the first cutting die seizing during a rod-cutting operation. The clutch mechanism includes a ring gear in the planetary transmission, and a spring that rotationally affixes the ring gear below a predetermined threshold of reaction torque through the drivetrain and permits rotation of the ring gear above the threshold.
Claims16
A powered threaded rod cutter comprising:
- first and second cutting dies;
- an electric motor;
- a planetary transmission positioned downstream of the motor;
- a drivetrain for converting a rotational output of the transmission to a pivoting movement of the first cutting die;
- and
- a clutch mechanism for redirecting torque from the motor away from the drivetrain and the first cutting die in response to the first cutting die seizing during a rod-cutting operation, wherein the clutch mechanism includes
- a ring gear in the planetary transmission, and
- a spring that rotationally affixes the ring gear relative to a transmission housing below a predetermined threshold of reaction torque through the drivetrain and permits rotation of the ring gear above the threshold.
A powered threaded rod cutter comprising:
- an electric motor;
- a trigger operable by a user to activate the motor;
- a cam that receives torque from the electric motor when the motor is activated, causing the cam to rotate;
- a follower having a moveable cutting die attached thereto that is pivoted in response to being driven by the cam to perform rod-cutting operations;
- a drivetrain positioned between the motor and the cam, the drivetrain including a rotational member;
- a Hall-effect sensor configured to detect a rotational position of the rotational member or a rotational position of the cam for deactivating the motor after completion of one cycle of a rod-cutting operation;
- a magnet attached to the rotational member, wherein the Hall-effect sensor detects the rotational position of the cam via the rotational member, and wherein the motor is deactivated in response to the Hall-effect sensor detecting the magnet after one revolution of the rotational member;
- and
- a clutch mechanism for redirecting torque from the electric motor away from the cam in response to the moveable die seizing during a rod-cutting operation.
A powered threaded rod cutter comprising:
- an electric motor;
- a planetary transmission positioned downstream of the motor;
- a drivetrain for converting a rotational output of the transmission to a pivoting movement of a moveable die, wherein the drivetrain includes
- a cam that receives torque from the electric motor causing the cam to rotate,
- a follower having the moveable die attached thereto that is pivoted in response to being driven by the cam to perform rod-cutting operations, and
- a sensor configured to detect a rotational position of the cam for deactivating the motor after completion of one cycle of a rod-cutting operation;
- and
- a clutch mechanism for redirecting torque from the electric motor away from the drivetrain in response to the moveable die seizing during a rod-cutting operation, wherein the clutch mechanism includes
- a ring gear in the planetary transmission, and
- a spring that rotationally affixes the ring gear relative to a transmission housing below a predetermined threshold of reaction torque through the drivetrain and permits rotation of the ring gear above the threshold.
Dependencies are inferred from the claim text.