Torque indicating device
US4091663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1975 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Oct 22, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The torque transmitted through a pair of helical gears mounted on a lay shaft imposes an axial force on the lay shaft which is reflected into fluid pressure to indicate the magnitude of the torque. By journaling the lay shaft within sleeves which are also the inner races of a pair of roller bearings its axial movements are sensitively transmitted to a nonrotating piston rod mounted in ball bearings within the bore of the lay shaft. The piston is displaceable into a cylinder supplied with pressurized lubricating fluid through a valve responsive to the axial displacenent of the piston. The fluid pressure in the cylinder balances the axial force transmitted to the piston and is proportional to the transmitted torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.