Driver for a bone screw
AssigneePioneer Surgical Technology, Inc.
InventorScott J. Perrow
Life of this patent
Estimating the term…
Abstract
In accordance to one aspect of the present disclosure, a driver for a bone screw is provided that includes an inner shaft and a distal drive head of the inner shaft. The drive head is configured to fit in a drive recess of a bone screw to form a mating connection therewith. The driver further includes at least one outer, resilient locking member shiftable along the inner shaft from a proximal, unlocked position to a distal, locked position. The resilient locking member has a locking portion that contacts and is urged outwardly by a proximal ramp surface of the drive head as the locking member shifts distally from the unlocked position to the locked position to secure the bone screw onto the drive head.
Claims11
A bone screw driving system comprising:
- a bone screw having a drive recess and a seating surface of the drive recess;
- a driver including an elongate shaft assembly having a proximal end portion, a distal end portion configured to connect to the bone screw, and a longitudinal axis extending therebetween;
- an inner drive member of the distal end portion of the driver elongate shaft assembly configured to extend into the drive recess of the bone screw;
- a distal surface of the inner drive member configured to seat against the seating surface of the drive recess;
- an outer expansion locking member of the distal end portion of the driver elongate shaft assembly shiftable along the longitudinal axis relative to the inner drive member;
- the outer expansion locking member having an initial configuration wherein the outer expansion locking member is proximal of the inner drive member distal surface and the inner drive member protrudes distally of the outer expansion locking member which permits the inner drive member to be advanced into the drive recess of the bone screw;
- the outer expansion locking member configured to be advanced into the drive recess with the outer expansion locking member in the initial configuration thereof and the inner drive member protruding distally of the outer expansion locking member;
- and
- the outer expansion locking member having an expanded configuration wherein the outer expansion member is shifted distally from the initial configuration while remaining proximal of the inner drive distal surface and the inner drive member protrudes distally of the outer expansion locking member, the outer expansion locking member in the expanded configuration thereof extending laterally outward of the inner drive member to engage the bone screw and fix the bone screw to the distal end portion of the driver elongate shaft assembly.
Dependencies are inferred from the claim text.