Patent ID: 6886216

Claim:
The combination comprising a tubular leg; a threaded stud disposed concentrically in said leg; a shank threaded onto said stud and extending coaxially of and through said leg; a collar mounted concentrically of said shank in non-rotatable longitudinally movable relation thereto and within said leg, said collar having an externally threaded annular portion extending through said leg; at least one element of resiliently deformable material positioned between said collar and said leg; and a locking nut threaded onto said threaded annular portion of said collar externally of said leg for abutting against said leg whereby threading of said nut relative to said collar and against said leg draws said collar in a direction out of said leg to resiliently deform said element into frictional engagement with said collar and said leg to lock said collar against rotation relative to said leg.