Power tool

Patent metadata

Field	Value
Publication number	US-11292118-B2
Application number	US-201916261488-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Jan 30, 2018
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A hydraulic tool includes a tool head and a moveable piston coupled to the tool head. The hydraulic tool head includes a plurality of jaws, which are operable to open and close for performing work on a workpiece. The hydraulic tool also includes a motor operable to drive the moveable piston to close the plurality of jaws to a closed position at which the work on the workpiece is completed. The hydraulic tool further includes a position sensor configured to detect when the plurality of jaws are at the closed position and responsively generate a sensor signal indicating that the plurality of jaws are at the closed position. Additionally, the hydraulic tool includes a controller configured to receive the sensor signal from the position sensor. The controller is configured to operate the motor based on the sensor signal that the controller receives from the position sensor.

First claim

We claim:

1. A hydraulic tool comprising:
a tool head comprising a plurality of jaws, which are operable to open and close for performing work on a workpiece;
a moveable piston coupled to the tool head;
a motor operable to drive the moveable piston to close the plurality of jaws to a closed position at which the work on the workpiece is completed;
a position sensor including a first sensor portion and a second sensor portion, the position sensor configured to detect when the plurality of jaws are at the closed position based on a consistent position of the first sensor portion relative to the second sensor portion in the closed position and responsively generate a sensor signal indicating that the plurality of jaws are at the closed position;
a controller configured to receive the sensor signal from the position sensor,
wherein the controller is configured to run the motor until the jaws are at the closed position.

2. The hydraulic tool of claim 1 , wherein the tool head is a cutting head,
wherein the plurality of jaws comprise a first blade and a second blade, and
wherein, in the closed position, the plurality of jaws complete a cut of the workpiece.

3. The hydraulic tool of claim 1 , wherein the tool head is a crimping head,
wherein the plurality of jaws comprise a first crimping die and a second crimping die, and
wherein, in the closed position, the plurality of jaws complete a crimp of the workpiece.

4. The hydraulic tool of claim 1 ,
wherein a first part of the hydraulic tool comprises the first sensor portion and a second part of the hydraulic tool comprises the second sensor portion,
wherein the first part of the hydraulic tool is configured to move relative to the second part of the hydraulic tool while the plurality of jaws open and close,
wherein the first part of the hydraulic tool is at a predetermined location relative to the second part of the hydraulic tool when the plurality of jaws are in the closed position, and
wherein the first sensor portion is configured to actuate the second sensor portion responsive to the first part of the hydraulic tool reaching the predetermined location relative to the second part of the hydraulic tool.

5. The hydraulic tool of claim 4 , wherein the plurality of jaws comprises a first jaw and a second jaw, and
wherein the first part of the hydraulic tool comprises the first jaw and the second part of the hydraulic tool comprises the second jaw.

6. The hydraulic tool of claim 4 , wherein the first part of the hydraulic tool comprises one of the plurality of jaws and the second part of the hydraulic tool comprises a frame of the tool head.

7. The hydraulic tool of claim 1 , wherein the first sensor portion comprises a contact switch, which is actuated responsive to second sensor portion physically contacting the first sensor portion.

8. The hydraulic tool of claim 1 , wherein first sensor portion comprises a Hall-Effect sensor and the second sensor portion comprises a magnetic element configured to actuate the Hall-Effect sensor.

9. The hydraulic tool of claim 1 , wherein the first sensor portion comprises a reed switch and the second sensor portion comprises a magnetic element configured to actuate the reed switch.

10. The hydraulic tool of claim 1 , further comprising:
a remote controller in communication with the controller,
wherein the remote controller comprises an input device, which is configured to provide a trigger signal to the controller to cause the motor to move the moveable piston,
wherein the controller is configured to provide a signal to the remote controller, and
wherein the remote controller comprises an output device configured to, responsive to the sensor signal received from the position sensor, provide at least one of an audio indication or a visual indication to a user that the work was completed.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Skinner Luke J
• Kanack Kris J
• Ballard James G
• Bauer David R
• Marks Troy A
• D'Antuono Marc S
• Bovard Paige L
• Norquist Eric

Classifications

• F15B21/08 Primary

  Servomotor systems incorporating electrically operated control means (F15B21/02, {F15B21/065} take precedence) · CPC title

• F15B19/00

  Testing; {Calibrating; Fault detection or monitoring; Simulation or modelling of} fluid-pressure systems or apparatus not otherwise provided for · CPC title

• B21F11/00

  Cutting wire · CPC title

• B21F1/002

  by means of manually operated devices, e.g. pliers · CPC title

• B21D11/10

  Bending specially adapted to produce specific articles, e.g. leaf springs {(making or bending leaf springs B21D53/886)} · CPC title