Torque stick for a rotary impact tool
US11986932B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2021 |
| Grant date | May 21, 2024 |
| Priority date | — |
| Expiry date | Feb 16, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0021
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotary impact tool including a motor having a motor shaft that produces a rotational output to drive a gear assembly and a drive assembly driven by the gear assembly. The drive assembly including a hammer coupled to the motor shaft and an anvil configured to receive an impact from the hammer. The rotary impact tool includes a torque stick coupled to the anvil and configured to limit the amount of deliverable torque to a workpiece in accordance with a torsional stiffness of the torque stick, a position sensor to detect angular displacement of the anvil, and a controller in electrical communication with the position sensor. The controller calculates torque delivered to the workpiece from the impact by multiplying the torsional stiffness of the torque stick and the signal from the position sensor, and control the motor based on the torque delivered to the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.