US Patent 11193556 Transmission for tensioning device

A power transmission for tensioners such as load binders and turnbuckles includes a driving gear and a driven gear mounted on or part of a driven shaft. The driving gear includes an axially protruding support boss which is received within a groove in the driven shaft. In a preferred embodiment the driving gear includes a lubricant reservoir and a lubricant passage communicating to the end face of the support boss in contact with the floor of the groove. The sidewalls of the groove constrain the support boss against longitudinal movement with respect to the axis of the driven shaft.