Apparatus and method for determining torque and presenting digital torque readout in a torque wrench system
US4791839A · kind A · utility
13Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1986 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | May 30, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/24
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus and a method are presented for determining the torque load applied to a fastening element by a fluid powered wrench, and displaying a digital readout of the torque. The operating pressure of the wrench, after compensation for the temperature of the pressure transducer, is converted to a torque measurement by programmed microprocessor and the torque value is displayed on a digital readout. The system is useable with and adjusts for wrenches of several sizes by an input selector switch connected to the microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.