Thompson coupling

The Thompson coupling is a type of universal joint that, unlike traditional universal joints, has true constant velocity between the drive and driven shaft. It consists essentially of two universal joints assembled coaxially and therefore also incorporates an advantage of the universal joint, no load bearing sliding surfaces. The Thomson coupling is the first constant-velocity coupling to have this property. The elimination of sliding surfaces is claimed to reduce energy losses, and improve longevity compared to constant-velocity joints. According to its inventor, Glenn Thompson, the coupling uses about 8 per cent less energy then an equivalent system.

The coupling has earned its inventor the Australian Society for Engineering in Agriculture Engineering Award.

External links

• Thompson Couplings Limited - Explanation of the Thompson coupling