Impact-driven rotating device
US6371218B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Aug 16, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/1405
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact-driven rotating device includes an output shaft, a hammer for rotating the output shaft by imparting an impact to the output shaft, a rotation driver for rotating the hammer, an impact detector for detecting the impact imparted by the hammer, a rotation angle detector for detecting a rotation angle of the output shaft, a rotation speed detector for detecting a rotation speed of the output shaft from the rotation angle detected by the rotation angle detector, an energy calculator for calculating energy imparted to the output shaft from the rotation speed detected by the rotation speed detector, a between-impacts rotation angle calculator for calculating a rotation angle of the output shaft rotated from when the impact detector detected the impact to when the impact detector detects an subsequent impact from the rotation angle detected by the rotation angle detector, a tightening torque calculator for calculating a tightening torque by dividing the energy calculated by the energy calculator by the rotation angle calculated by the between-impacts rotation angle calculator, and a controller for stopping the rotation driver when the tightening torque calculated by the tighteni…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.