Patent ID: 6971719

Claim:
A clutch actuator for an ergonomic support assembly having a load comprising: a housing; a load bearing element disposed within said housing to be attachable to the load; means for adjusting force to a portion of said load bearing element relative to the load; a stop assembly having a retainer fixed within said housing, said retainer retaining a stopper between a portion of said load bearing element and a portion of said force adjusting means, said stopper being dimensioned relative to said retainer and to said load bearing element to stop movement of said load bearing element relative to said retainer in the absence of a force application, and said stopper being dimensioned relative to said retainer and to said load bearing element to allow movement of said load bearing element relative to said retainer when said force adjusting means applies said force against the load and releases said force toward the load; wherein at least one surface of said retainer, said stopper and said portion of said load bearing element is textured to include at lease one groove; and a traction linkage in operative engagement with said load bearing element and said housing at a first end, and said traction linkage having a second end in operative engagement with the ergonomic support assembly.