Patent ID: 7569055

Claim:
An osteosynthetic aid for tubular bones, comprising a locking nail which has a longitudinally extending shank with first and second ends and defining an outer bone contacting surface, at least one cross-bore extending along an axis transverse to a longitudinal axis of the shank and a locking screw having a head for extending through said cross-bore and a biasing sleeve which extends adjacent the locking screw along the transverse axis and resiliently axially deforms in the direction along the transverse axis between the head of the locking screw and an outer shank surface surrounding the cross-bore in the locking nail shank wherein the sleeve has a radial flange at a first end against which the head of the locking screw comes to bear and the sleeve has a second end opposite the first end, the second end having a lower surface that bears against the outer bone contacting surface of the locking nail shank and is held axially in position by engagement with the nail shank outer surface surrounding the bore wherein the locking screw has a threaded portion which interengages with a thread of a cross-bore.