Patent ID: 8328217

Claim:
A control device for a machine having a first part and a second part mounted for swiveling movement about an axis relative to the first part, said control device comprising: a first mechanical linkage acting between a first linkage controlling mechanism fixed relative to a first part of a machine and a first linkage controlled mechanism fixed relative to a second part of the machine, said first mechanical linkage comprising a first linkage bearing having at least two parts relatively rotatable about an axis and connected respectively to said first linkage controlling and first linkage controlled mechanisms; and a second mechanical linkage acting between a second linkage controlling mechanism fixed relative to said first part of said machine and a second linkage controlled mechanism fixed relative to said second part of said machine, said second mechanical linkage comprising a second linkage bearing located radially outward of said first linkage bearing and having at least two parts relatively rotatable about said axis and connected respectively to said second linkage controlling and controlled mechanisms; wherein said first linkage bearing and said second linkage bearing being arranged, one within another, so that said first linkage and second linkage bearings do not occupy an excessive dimension in an axial direction.