Cylindrical elastomeric bearing with large angular deflection

System of cylindrical elastomeric bearings, comprising first and second cylindrical elastomeric bearings with wide angular deflection, formed between an inner sleeve and an outer sleeve, each of said first and second cylindrical elastomeric bearings comprising three coaxial cylindrical torsible elements:

• one central element, and two lateral elements arranged either side of the central element, each torsible cylindrical element having a deformable elastomeric central part, relatively flexible angularly and relatively rigid radially, which is rigidly locked to an inner armature and an outer armature, the outer armature of the central element and the inner armature of each lateral element being rigidly locked together so as to form a single common armature, wherein the inner armature of the central element is mounted on the inner sleeve to which it is rigidly locked, and the outer armature of each lateral element is mounted in the outer sleeve to which it is rigidly locked, the inner sleeve and outer sleeve being coaxially arranged in such as way that the outer sleeve and inner sleeve can rotate in relation to each other about their common axis with virtually no possibility of radial deflection.

Gyroplane rotor head, comprising for each of a plurality of blades, a system of cylindrical elastomeric bearings having first and second cylindrical elastomeric bearings with wide angular deflection, formed between an inner sleeve and an outer sleeve, each of said first and second cylindrical elastomeric bearings comprising three coaxial cylindrical torsible elements:

• one central element, and first and second lateral elements arranged either side of the central element, each torsible cylindrical element having a deformable elastomeric central part, relatively flexible angularly and relatively rigid radially, which is rigidly locked to an inner armature and an outer armature, the outer armature of the central element and the inner armature of each lateral element being rigidly locked together so as to form a single common armature, wherein the inner armature of the central element is mounted on an inner sleeve to which it is rigidly locked, and the outer armature of each lateral element is mounted in an outer sleeve to which it is rigidly locked, the inner sleeve and outer sleeve being coaxially arranged in such a way that the outer sleeve and inner sleeve can rotate in relation to each other about their common axis with virtually no possibility of radial deflection.