Patent ID: 8328855

Claim:
An osteosynthesis device comprising a plate ( 10 ) that can extend along a piece of bone and fixing means for holding a pin ( 20 ) through said plate, said pin ( 20 ) being screwable into said piece of bone, said plate ( 10 ) having at least two recesses ( 12 ) made in its thickness to accept said fixing means, each of said recesses defining a closed inner edge ( 22 ), said fixing means comprising a ring ( 14 ) intended to accept said pin ( 20 ), said ring ( 14 ) being designed to engage with said inner edge ( 22 ) and said fixing means further comprising screwable locking means ( 32 ) to lock said pin ( 20 ) in a fixed position with respect to said plate ( 10 ); characterized in that said plate ( 10 ) has at least one threaded opening ( 26 ) made at the margins of each of said recesses ( 12 ) so as to exhibit an axial aperture ( 30 , 31 ) opening into said inner edge ( 22 ), while said ring ( 14 ) is radially split so as to be diametrically compressible; and in that said screwable locking means comprise a screw ( 32 ) intended to be screwed through said threaded opening ( 26 ) to press against said ring ( 14 ) through said axial aperture ( 30 , 32 ) and cause both said ring ( 14 ) to be pressed forcibly against a portion of said inner edge ( 22 ) diametrically opposite said threaded opening ( 26 ), and said ring ( 14 ) to tighten onto said pin ( 20 ), by virtue of which said pin ( 20 ) is held in a fixed position with respect to said plate ( 10 ).