amount of pivotal movement between the link 28 and the end plate 30 is accordingly greater than would be possible than by applying compressive forces to the same thickness of elastomeric filler the curved surfaces allow greater pivotal motion than would be possible between generally planar surfaces by ensuring that the amount of deformation near the edges of the elastomer is similar to that at the centre use of the elastomeric filler 38 to transmit force to and from the links 28 of the flexible element 26 also eliminates clearance which would give rise to free play because of the thin layers of elastomer used more torque can be transmitted by the coupling design of the present invention than would be possible were the entire links 28 made of an elastomeric material the resistance to flexion of the coupling of the present invention can be increased by compressing the elastomeric material 38 between the end plate 30 and the link 28 various means can be used to effect such compression such as placing a circumferential band around the assembled coupling prior to its installation and tightening the band this forces the wedges radially inward and accordingly forces the end plates 30 toward the links 28 of the flexible elements 26 by deforming the elastomeric filler 38 thus putting the coupling in radial compression in the uncompressed state the engagement points on the wedges 12 which can for example be bolt holes 48 as shown in fig1 are at an effective radial distance from the axis of symmetry 44 upon compression the distance between the engagement points and the axis of symmetry 44 will be less than that effective radial distance in order to maintain the coupling in its compressed state the perpendicular distance between the rotational.