Wrench with controlled tightening
US7036407B2 · kind B2 · utility
4Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2004 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Jul 16, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention provides an electronic wrench which includes means for measuring the instantaneous applied torque and means for measuring the instantaneous angle of rotation during tightening. The physical parameters of the screw connection for tightening and a setpoint value for the tightening are initially entered into the wrench via a keypad. During the tightening operation, the processor means calculate the instantaneous traction force on the screw fastener as a function of the measured instantaneous values of torque and angle and as a function of the recorded characteristics of the screw fastener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.