Patent · US Active

Bone anchor assemblies

US9782204B2 · kind B2 · utility

23Cited by

174References

5Claims

0Family size

Assignee

Medos International Sarl · CH

Inventors

Frank Spratt · Bridgewater, US
Ernest Quintanilha · Norton, US
Thibault Chandanson · Yverdon-les-Bains, CH

Key dates

Filing date	Sep 17, 2013
Grant date	Oct 10, 2017
Priority date	—
Expiry date	Sep 17, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B17/7037
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A bone anchor assembly includes a bone anchor, a receiver member for receiving a spinal fixation element to be coupled to the bone anchor, a compression member positioned within the receiver member, and a closure mechanism including an outer set screw and an inner set screw. The outer set screw delivers a distal force to the compression member to fix the bone anchor relative to the receiver member. The proximal surface of the compression member has a shape configured to restrict deformation of the compression member arms including motion of the compression member arms relative to each other. The distal surface of the outer set screw has a shape that is complementary to the shape of the proximal surface of the compression member.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.