4AS

The principle of coupling polygon shaped rubber element with vulcanized in metal parts.

The important innovation is that screws connecting the rubber element with the hubs are alternately arranged axially and radially.

The radial screws connecting the rubber element to the hub and producing a preload by radial compression of the rubber column.

Coupling has 4-way flexibility:

1. Torsional elasticity
2. Radial flexibility
3. Axial flexibility
4. Angular flexibilty